[Bug 1939996] Re: kernel BUG at mm/zswap.c:1275
The fix is not in upstream 5.11 stable... So maybe send SRU to ubuntu kernel to include the fix: https://wiki.ubuntu.com/Kernel/Dev/StablePatchFormat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939996 Title: kernel BUG at mm/zswap.c:1275 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1939996] Re: kernel BUG at mm/zswap.c:1275
This happens for me if zswap was enabled with zsmalloc pool. ref: https://www.spinics.net/lists/linux-mm/msg245604.html For 20.04 hwe, this also affects 5.11.0.25 but previous hwe 5.8.0.x were not affected. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939996 Title: kernel BUG at mm/zswap.c:1275 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1939996] Re: kernel BUG at mm/zswap.c:1275
** Attachment added: "dmesg_0859.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+attachment/5518107/+files/dmesg_0859.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939996 Title: kernel BUG at mm/zswap.c:1275 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1939996] Re: kernel BUG at mm/zswap.c:1275
I can reproduce the bug on -22 and -25 kernels. Here are almost full dmesg logs. You can see SSD errors where swap is placed. This issue may be related to them somehow. To exclude hardware element of errors, I will try other more recent laptop or VirtualBox. Steps: 1. sudo mount -t tmpfs -o mode=775 tmpfs /mnt 2. sudo dd if=/dev/urandom of=/mnt/garbage Wait till ENOSPC. In my case, the garbage file becomes of 8 GB. 3. ./eatmem 500 This hand-made program only consumes a lot of memory in a loop then sleeps. So I speculate when the kernel wants to displace tmpfs content to a swap, it encounters the bug. If I reverse second and third steps, the bug does not appear. ** Attachment added: "dmesg_0846.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+attachment/5518106/+files/dmesg_0846.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939996 Title: kernel BUG at mm/zswap.c:1275 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1939996] Re: kernel BUG at mm/zswap.c:1275
** Attachment added: "eatmem.c" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+attachment/5518108/+files/eatmem.c -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939996 Title: kernel BUG at mm/zswap.c:1275 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1939996] Re: kernel BUG at mm/zswap.c:1275
Did this issue happen on previous kernels? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939996 Title: kernel BUG at mm/zswap.c:1275 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1939996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
