[Kernel-packages] [Bug 1788222] Re: Bugfix for handling of shadow doorbell buffer
I was able to verify that the fix in Xenial 4.4.0-138.164 works. The procedure was the same as in comment #4 [1], but with less run time. [1] https://bugs.launchpad.net/ubuntu/+source/linux- gcp/+bug/1788222/comments/4 ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-gcp in Ubuntu. https://bugs.launchpad.net/bugs/1788222 Title: Bugfix for handling of shadow doorbell buffer Status in linux package in Ubuntu: Fix Committed Status in linux-gcp package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Committed Status in linux source package in Bionic: Fix Released Status in linux source package in Cosmic: Fix Committed Bug description: This request is to pull in the following patch for NVMe bug from https://lore.kernel.org/patchwork/patch/974880/ in the linux-gcp kernel: === This patch adds full memory barrier into nvme_dbbuf_update_and_check_event function to ensure that the shadow doorbell is written before reading EventIdx from memory. This is a critical bugfix for initial patch that added support for shadow doorbell into NVMe driver[...]. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788222/+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 1788222] Re: Bugfix for handling of shadow doorbell buffer
Applied the patch from -proposed: root@Ubuntu1804:~# echo "deb http://archive.ubuntu.com/ubuntu/ bionic-proposed restricted main multiverse universe" | tee -a /etc/apt/sources.list root@Ubuntu1804:~# apt-get update root@Ubuntu1804:~# apt-get dist-upgrade root@Ubuntu1804:~# shutdown -r 0 Verified that the -proposed contains fix: root@Ubuntu1804:~# objdump -d /lib/modules/$(uname -r)/kernel/drivers/nvme/host/nvme.ko | grep -A 50 __nvme_submit_cmd\>: | grep fence adf:0f ae f8sfence ae6:0f ae f0mfence (second mfence is the one added by patch) Verified that the patch solves the issue: ./orion -run advanced -num_large 0 -size_small 8 -type rand -simulate concat -write 40 -duration 120 -matrix row -testname gcp_test (no hang after 36 hours) I assume that the same patch will be added to Xenial and Cosmic. ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- 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/1788222 Title: Bugfix for handling of shadow doorbell buffer Status in linux package in Ubuntu: In Progress Status in linux-gcp package in Ubuntu: New Status in linux source package in Xenial: In Progress Status in linux source package in Bionic: Fix Committed Status in linux source package in Cosmic: In Progress Bug description: This request is to pull in the following patch for NVMe bug from https://lore.kernel.org/patchwork/patch/974880/ in the linux-gcp kernel: === This patch adds full memory barrier into nvme_dbbuf_update_and_check_event function to ensure that the shadow doorbell is written before reading EventIdx from memory. This is a critical bugfix for initial patch that added support for shadow doorbell into NVMe driver[...]. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788222/+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
