[Kernel-packages] [Bug 1848739] Re: [linux-azure] Patch to prevent possible data corruption
For reference, this is the extensive upstream kernel discussion
https://bugzilla.kernel.org/show_bug.cgi?id=201685
The filesystem corruption issue is real, not theoretical, and
was the extensive discussion of problems experienced during the early days of
4.19:
** Bug watch added: Linux Kernel Bug Tracker #201685
https://bugzilla.kernel.org/show_bug.cgi?id=201685
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https://bugs.launchpad.net/bugs/1848739
Title:
[linux-azure] Patch to prevent possible data corruption
Status in linux-azure package in Ubuntu:
Confirmed
Bug description:
There are three patches that prevent possible data corruption. The
three commits are:
aef1897cd36d ("blk-mq: insert rq with DONTPREP to hctx dispatch list when
requeue")
c616cbee97ae ("blk-mq: punt failed direct issue to dispatch list")
923218f6166a ("blk-mq: don't allocate driver tag upfront for flush rq")
18.04 has all three of these patches. 16.04 has two out of the three,
but it is missing commit c616cbee97ae.
We would like to request commit c616cbee97ae be included in the 16.04 kernel:
c616cbee97ae ("blk-mq: punt failed direct issue to dispatch list")
To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1848739] Re: [linux-azure] Patch to prevent possible data corruption
This data corruption issue was written about extensively here
https://lwn.net/Articles/774440/
as part of the early 4.19 days when a number of folks were seeing ext4
filesystem corruption as a consequence of the blk-mq bug.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-azure in Ubuntu.
https://bugs.launchpad.net/bugs/1848739
Title:
[linux-azure] Patch to prevent possible data corruption
Status in linux-azure package in Ubuntu:
Confirmed
Bug description:
There are three patches that prevent possible data corruption. The
three commits are:
aef1897cd36d ("blk-mq: insert rq with DONTPREP to hctx dispatch list when
requeue")
c616cbee97ae ("blk-mq: punt failed direct issue to dispatch list")
923218f6166a ("blk-mq: don't allocate driver tag upfront for flush rq")
18.04 has all three of these patches. 16.04 has two out of the three,
but it is missing commit c616cbee97ae.
We would like to request commit c616cbee97ae be included in the 16.04 kernel:
c616cbee97ae ("blk-mq: punt failed direct issue to dispatch list")
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1848739/+subscriptions
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[Kernel-packages] [Bug 1736593] Re: ThunderX: TX failure unless checksum offload disabled
Thanks Dann. Scott is testing this and has found an additional issue, but we're not sure yet whether it's directly related or independent. He'll file a more detailed report or open another Launchpad as appropriate. -- 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/1736593 Title: ThunderX: TX failure unless checksum offload disabled Status in linux package in Ubuntu: Fix Committed Status in linux source package in Artful: Fix Committed Bug description: [Impact] Most attempts to use IPv6 on the ThunderX NIC will fail. [Test Case] Attempt an IPv6 TCP connection: $ wget -6 'http://www.kernel.org/' The connection will time out. [Regression Risk] The fix is upstream, and is limited to the ThunderX nicvf driver. [Workaround] Disable TX checksum offload: $ ethtool -K eth0 tx off [More Details] The issue first appears in Linux 4.12. A fix from Cavium has been merged upstream: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/ethernet/cavium/thunder/nicvf_queues.c?id=fa6d7cb5d76cf0467c61420fc9238045aedfd379 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1736593/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1736593] Re: ThunderX: TX failure unless checksum offload disabled
Thank you. We will be testing this new kernel at Packet and will report results. -- 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/1736593 Title: ThunderX: TX failure unless checksum offload disabled Status in linux package in Ubuntu: Fix Committed Status in linux source package in Artful: Fix Committed Bug description: [Impact] Most attempts to use IPv6 on the ThunderX NIC will fail. [Test Case] Attempt an IPv6 TCP connection: $ wget -6 'http://www.kernel.org/' The connection will time out. [Regression Risk] The fix is upstream, and is limited to the ThunderX nicvf driver. [Workaround] Disable TX checksum offload: $ ethtool -K eth0 tx off [More Details] The issue first appears in Linux 4.12. A fix from Cavium has been merged upstream: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/ethernet/cavium/thunder/nicvf_queues.c?id=fa6d7cb5d76cf0467c61420fc9238045aedfd379 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1736593/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1633629] Re: arm64: KASLR breaks MODVERSIONS
I was able to replicate this failure on an ARMv8 (aarch64) xenial system, using the supplied instructions for QEMU and getting the modprobe error. -- 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/1633629 Title: arm64: KASLR breaks MODVERSIONS Status in linux package in Ubuntu: In Progress Status in linux source package in Yakkety: In Progress Bug description: [Impact] On certain arm64 platforms, modules will not load. This doesn't impact any certified hardware to date, but is known to impact some pre-release platforms, as well as QEMU when a virtio-rng-pci device is attached. [Test Case] On a xenial/arm64 host, run: sudo apt install qemu-system-arm qemu-efi wget http://ports.ubuntu.com/ubuntu-ports/dists/yakkety/main/installer-arm64/20101020ubuntu483/images/netboot/mini.iso cp /usr/share/AAVMF/AAVMF_CODE.fd flash0.img cp /usr/share/AAVMF/AAVMF_VARS.fd flash1.img sudo qemu-system-aarch64 -enable-kvm -m 2048 -cpu host -M virt,gic_version=host -nographic -pflash flash0.img -pflash flash1.img -drive file=mini.iso,id=cdrom,if=none,media=cdrom -device virtio-scsi-device -device scsi-cd,drive=cdrom -device virtio-rng-pci Select Install from the GRUB menu, and continue through the installer menus to "Detect network hardware". On failure, the installer will report 'Error while running "modprobe -v -b usb-storage"'. On success, it'll continue through to the network configuration screens. [Regression Risk] This will be a simple cherry pick from upstream, so we'll have upstream support w/ any regressions. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1633629/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
