Here's the proposed debdiff. I'm currently waiting on confirmation from the customer of resolution, but that may never come, as it is so difficult to reproduce this issue.
Also need to double check if this applies to the cloud archives. ** Patch added: "lp1655225.trusty.debdiff" https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1655225/+attachment/4802219/+files/lp1655225.trusty.debdiff ** Description changed: [Impact] - * VM running in QEMU with this message in qemu log + * VM running in QEMU with this message in qemu log qemu-system-x86_64: /build/qemu-_D3HGx/qemu-2.0.0+dfsg/block.c:3491: bdrv_error_action: Assertion `error >= 0' failed. - - * This results in the VM needing to be restarted. + + * This results in the VM needing to be restarted. [Test Case] - * This only reproduces under extremely high I/O load and very infrequently. - Once per month on major clouds. + * This only reproduces under extremely high I/O load and very infrequently. + Once per month on major clouds. [Regression Potential] - * Commit 3bbf572345c is included in 2.4.0-rc4 and newer, and still - exists I have not found any commits referencing it as a regressor. + * Commit 3bbf572345c is included in 2.4.0-rc4 and newer, and still exists I have not found any commits referencing it as a regressor. + + * Patch adds memory barriers so regressions may show up in the form of + performance issues. [Other Info] - - * Redhat identified this commit as the fix for the issue here - https://access.redhat.com/solutions/1459913 - https://bugzilla.redhat.com/show_bug.cgi?id=1142857 - https://git.centos.org/blob/rpms!qemu-kvm/05bba06e575829071bce813e12709f9ec477f120/SOURCES!kvm-atomics-add-explicit-compiler-fence-in-__atomic-memo.patch + + * Redhat identified this commit as the fix for the issue here + https://access.redhat.com/solutions/1459913 + https://bugzilla.redhat.com/show_bug.cgi?id=1142857 + https://git.centos.org/blob/rpms!qemu-kvm/05bba06e575829071bce813e12709f9ec477f120/SOURCES!kvm-atomics-add-explicit-compiler-fence-in-__atomic-memo.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1655225 Title: Under heavy load qemu hits bdrv_error_action: Assertion `error >= 0' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1655225/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
