[Kernel-packages] [Bug 1833281]
(In reply to ValdikSS from comment #60) > I'm not sure, but people on Rosa forum blamed BTRFS for this bug. I'm pretty > sure it's not directly tight with BTRFS, but write and read amplification > may explain why lags are more severe with this FS. People here and on ROSA forum blamed BTRFS for the problem that swap is being not used, but not for microfreezes... -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.K0 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B350M MORTAR (MS-7A37) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 4 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version:
[Kernel-packages] [Bug 1833281]
(In reply to ValdikSS from comment #58) > I have an idea why this bug is much worse with BTRFS than with EXT4: BTRFS > has much bigger read/write amplification, up to 10x higher than EXT4. You mean that when e.g. Chromium browser writes its cache, it loads IO "up to 10x higher than EXT4", and, when IO is also loaded by swapping, it causes microfreezes? Are you sure that operations that cause write amplifications are not done in background? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.K0 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B350M MORTAR (MS-7A37) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 4
[Kernel-packages] [Bug 1833281]
(In reply to ValdikSS from comment #53) > Recently, about since kernel 5.2.7, the issue is either gone or present to > much less extent. > Right now I'm running kernel 5.2.11 and finally I can keel Firefox and > VirtualBox running at the same time, with 3G+ in swap, and the system does > not freeze. > > Could anyone affected by this issue try newer kernels? First of all, did you reset all your custom sysctls to default values? 1) One user (ilfat@) reported that: 1.1) on kernels 4.19.57 and Ubuntu kernel 4.15.0-54 his system did not swap correctly: all memory was full but only a small part of the swap was used, that lead to freezes 1.2) on kernels 4.19.67 and Ubuntu kernels 4.15.0-60, 4.15.0-62 systemd swaps in general normally, but he tweaked vm.watermark_scale_factor to make it swap better 1.3) Ilfat had exactly the same problem on both ext4 and btrfs So, something was fixed in upstream, backported to LTS kernel 4.19 and to Ubuntu kernel. I don't know what. And that issue is 100% not in BTRFS but is another problem or another aspect of the problem. 2) I did not see much difference between Ubuntu kernels 54 and 60, 62 in what is described in comment#51. So, that mystereous fix did not help. 3) another user (anreas@) reports the same as in (2): https://forum.rosalinux.ru/viewtopic.php?p=101903=621857320f4d1a566e0cfa6e80ff4a8c#p101903 4) trying to overcome issues from comment#51, I built Ubuntu kernel 4.15.0 with 2 pathes: * https://abf.io/mikhailnov/kernel-desktop-4.15/blob/master/le9-rosa.patch * https://abf.io/mikhailnov/kernel-desktop-4.15/blob/master/Chromium-OS-low-memory-patchset.patch and set kernel options: # https://bugzilla.kernel.org/show_bug.cgi?id=196729#c36 vm.watermark_scale_factor=100 vm.unevictable_activefile_kbytes=10 #vm.swappiness=80 # https://bugs.chromium.org/p/chromium/issues/detail?id=263561#c16 # Disable swap read-ahead vm.page-cluster=0 After that, I _thank_ it became a bit better (I cannot prove it by numbers, just was unbale to make the system become inresponsive, but LA remained the same), but unfortunately the main user of that notebook did not use it for some days and so right now I can't say that according to her feedback the situation has improved and the system does not microfreeze from time to time anymore. Let's wait a bit more. And still that may be a coincidence, not the result of patches and/or tweaked sysctls. I was able to dead lock that system by openning too many tabs in Chromium, but that is not what those patches should have solved. nohang/earlymoon would have probably helped if it was used. > > Mikhail, I have a spare laptop which I can setup for you for tests. Do you > have time and wish to investigate this issue? I don't have ideas how to investigate it. And how to measure the result. Maybe PSI can tell something, I did not try to look at them. And even more, I don't understand what the problem is ;) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues.
[Kernel-packages] [Bug 1833281]
(In reply to howaboutsynergy from comment #55) > On an unrelated note(but since btrfs was thought to be a problem at some > point), I've discovered that btrfs with zstd:5 (or worse zstd:15) can cause > (at least) mouse cursor stuttering(like it was skipping frames), while > zstd:1 doesn't(likely because of the low CPU usage during compression), > regardless of how fast/many writes are happening on the SSD(2-6M/s with > zstd:15, 38-50+M/s with zstd:1), apparently due to high CPU usage during the > compression. (zstd unspecified means zstd:3 aka default) I tried to move Chromium cache from btrfs to tmpfs, nothing became better, seems that Load Average became even a bit bigger in peacks (regrading what is described in comment#51). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019
[Kernel-packages] [Bug 1833281]
(In reply to Mikhail Novosyolov from comment #54) > > So, something was fixed in upstream, backported to LTS kernel 4.19 and to > Ubuntu kernel. I don't know what. And that issue is 100% not in BTRFS but is > another problem or another aspect of the problem. > I can suspect commit 2c012a4ad1a2cd3fb5a0f9307b9d219f84eda1fa "mm: vmscan: scan anonymous pages on file refaults" https://github.com/torvalds/linux/commit/2c012a4ad1a2cd3fb5a0f9307b9d219f84eda1fa It appeared in kernel 5.3 and was backported to 4.19.62 and Ubuntu kernel 4.15.0-59 (In reply to ValdikSS from comment #53) > Recently, about since kernel 5.2.7, the issue is either gone or present to > much less extent. > Right now I'm running kernel 5.2.11 and finally I can keel Firefox and > VirtualBox running at the same time, with 3G+ in swap, and the system does > not freeze. ... and to 5.2.3 But that commit "fixes" commits from the era of kernels 3.8 and 3.9, so probably it is not the one I'm looking for. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no
[Kernel-packages] [Bug 1833281]
Forgot to write, that if I ran $ stress --vm 2 --vm-bytes 1000M --vm-keep swap is eventually used normally -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.K0 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B350M MORTAR (MS-7A37) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 4 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.K0:bd01/22/2019:svnMicro-StarInternationalCo.,Ltd.:pnMS-7A37:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB350MMORTAR(MS-7A37):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct4:cvr1.0: dmi.product.family:
[Kernel-packages] [Bug 1833281]
(In reply to ValdikSS from comment #36) > Those who experience the issue, try to set the following sysctl settings: > > vm.swappiness=100 > vm.watermark_scale_factor=200 > > It greatly helps on my PC. It did not change anything. Still only around ~15 MB are swapped while 3.5 out of 4 GB of RAM is used. This results to high load average (9-15) when loading new tabs in Chromium. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.K0 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B350M MORTAR (MS-7A37) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 4 dmi.chassis.vendor: Micro-Star International Co., Ltd.
[Kernel-packages] [Bug 1833281]
Created attachment 284677 log of read_vmstat when filling RAM with new tabs in Chromium (In reply to Michal Hocko from comment #8) > Created attachment 258067 [details] > read_vmstat.c > > On Tue 22-08-17 15:55:30, Andrew Morton wrote: > > > > (switched to email. Please respond via emailed reply-to-all, not via the > > bugzilla web interface). > > > > On Tue, 22 Aug 2017 11:17:08 + bugzilla-dae...@bugzilla.kernel.org > wrote: > [...] > > Sadly I haven't been able to capture this information > > > fully yet due to said unresponsiveness. > > Please try to collect /proc/vmstat in the bacground and provide the > collected data. Something like > > while true > do > cp /proc/vmstat > vmstat.$(date +%s) > sleep 1s > done > > If the system turns out so busy that it won't be able to fork a process > or write the output (which you will see by checking timestamps of files > and looking for holes) then you can try the attached proggy > ./read_vmstat output_file timeout output_size > > Note you might need to increase the mlock rlimit to lock everything into > memory. I am facing the following issue on this [1] hardware: - when new tabs are openned in Chromium, swap (on SSD) is not used, 0K of swap is used. After about 2.5 GB out of total 4 GB RAM becomes used, about 15-50 MB of swap can be used, sometimes up to ~570 MB, but not more; - this leads to that Load Everage bumps from normal ~0.9 to 9-15 when loading a new tab in Chromium; - so the system in general freezes from time to time when working in the web browser and switching between tabs and/or openning new ones I have run your program read_vmstat (./read_vmstat vmstat.log 5s) and then ran a script that openned many tabs in Chromium, a new tab each 5s; after all tabs were openned, about ~3.5 GB of RAM became used, but only about 15 MB were swapped; then I ctrl+c'ed ./read_vmstat. Collected log is attached. Kernel was 4.15.0-58-generic in Ubuntu. [1] https://linux-hardware.org/?probe=414558f152 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug
[Kernel-packages] [Bug 1833281]
Did anybody try to reproduce it in a virtual environment? It would allow to bibisect the kernel automatically. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.K0 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B350M MORTAR (MS-7A37) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 4 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.K0:bd01/22/2019:svnMicro-StarInternationalCo.,Ltd.:pnMS-7A37:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB350MMORTAR(MS-7A37):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct4:cvr1.0:
[Kernel-packages] [Bug 1833281]
(In reply to Jim Rees from comment #47) > This bug is being discussed on lkml: > https://lkml.org/lkml/2019/8/4/15 > > I'm not going to participate there, but someone should point them to this > bug and point out that everything worked fine until 4.10. Sometimes things > that used to work and then got broken rate a higher priority. I believe it is not relevant. They are discussing problem of memory allocation in general, that behaviour did not change much in recent kernels. But what we are discussing is a regression of using swap in kernels >= 4.10 (or >= 4.11?). In that thread topic starter suggests to swapoff, but what we are discussing is wise a versa not using an enabled swap. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc.
[Kernel-packages] [Bug 1833281]
I encountered the same or a similar bug on BTRFS + HDD 5400 RPM + swap on a separate partition. Unfortunately, that notebook is not mine and is far away from me, what makes it hard to make experiments, kernels 4.15 and 4.18 both did have this problem, which can be reliably reproduced by running # stress --vm 2 --vm-bytes 2000M --vm-keep on that notebook with 4 GB RAM. After running stress Load Average bumps above 11.0 and the whole system freezes. Information about its hardware: https://linux-hardware.org/index.php?probe=af73180d0c (HDD is in bad condition as you may see in smartctl by the URL above, but I still believe it's not the reason why swap is not being used properly). Some other users complain about similar problems here: https://forum.rosalinux.ru/viewtopic.php?t=9387 (in Russian). Andreas17 there also uses BTRFS. I see that here, in my case, in bug#199763 and also in another case of similar problem that I know there are too many people with BTRFS, but this may be a coincidence. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth
[Kernel-packages] [Bug 1833281]
Did anyone try to reproduce it on (open)SUSE, especially with their LTS kernel 4.12? SUSE uses BTRFS by default and develops it, there is a chance that they might have caught and fixed or worked around this problem or maybe their default sheduler/kernel options/etc prevent this. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1833281 Title: System freeze when memory is put on SWAP in Linux >4.10.x Status in Linux: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: I'm reporting this since it's reproduceable the 70% of the time. Summary: In different circumstances, when the systems starts to swap out RAM memory, even small amounts, the system becomes completely unusuable and the screen freezes up, no mouse movement, no TTY access or SSH access can be made, only SYSRQ keys seem to do something (only reboot, so REISUB worked so far though, OOM is useless since the memory/swap is not even full) The I/O Disk led is stuck to 100% in ALL the following cases when this happens. So far: - This happens even when only ZRAM is enabled, and no swap partition is used. - Happens when ZSWAP is used with a swap partition - Happens also when a partition without zram or zswap is used - Maybe it's AMD specific? However, I'm not experiencing this on my laptop using the same tests. My laptop is an Intel one, while my desktop is an AMD Ryzen platform. Here are the specs: CPU: AMD Ryzen 5 1600 no OC GPU: AMD RX 580 8GB SSD: Crucial MX500 500GB MOBO: MSI B350M Grenade RAM: 8GB HyperX Kingston 2667Mhz Ubuntu version: 18.04 LTS, backports repo enabled Kernel version: 4.18.0-18, official ubuntu repo Bios settings: Default Additional info: Maybe I'm not 100% sure, but I noticed when using the 5.0.0-17 generic kernel, the lockups seem to still happen, but they recover eventually. Happened only a few times though... But will always be frozen for at least 30 seconds, differently from my intel laptop where those do occur. The SSD make is the same. I bought two of these, they got also the same amount of RAM. In my laptop those do not occur at all. Swapping memory even huge quantities like 1GB or more, do not produce any issues. Tests made: For testing this behaviour I tried: - Compiling the chromium-browser source code (takes up a lot of system RAM) - Used the "stress" command, using a specific amount of memory to decide how many it will be swapped, and here I noticed that even small quantities like a couple of megabytes will cause the system to freeze the 70% of the times Example: "stress --vm 1 --vm-bytes=7G" What should happen: I expect system slowdowns when swapping out memory since I do not have enough RAM, but unlikely when using Windows or my laptop with the same Linux version, not a completely unusuable environment. The swap partition is in both cases on an SSD. Reproduceability: 70% of the times Additional info again: I'm not sure this is due to any hardware failure, my SSD health is fine, as my CPU and RAM. As I said swapping in Windows works fine... --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC1: haru 2076 F pulseaudio /dev/snd/controlC2: haru 2076 F pulseaudio /dev/snd/controlC0: haru 2076 F pulseaudio CurrentDesktop: communitheme:ubuntu:GNOME DistroRelease: Ubuntu 18.04 IwConfig: enp24s0 no wireless extensions. lono wireless extensions. MachineType: Micro-Star International Co., Ltd. MS-7A37 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-17-generic root=UUID=75d45574-7169-4653-aea3-9f95087f0806 ro rootflags=subvol=@ quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.0.0-17.18~18.04.1-generic 5.0.8 RelatedPackageVersions: linux-restricted-modules-5.0.0-17-generic N/A linux-backports-modules-5.0.0-17-generic N/A linux-firmware1.173.6 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 5.0.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo video WifiSyslog: _MarkForUpload: True dmi.bios.date: 01/22/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.K0 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B350M MORTAR (MS-7A37) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 4 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: 1.0 dmi.modalias:
