Debdiff with updated version string now that I'm comfortable with the upload.
** Description changed: [Impact] * 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. [Test Case] * 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 has not been removed in latest develepment. 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 + * Only apply to Trusty as Xenial and newer have fix already. Ignoring + Precise because no currently reported cases. ** Patch added: "lp1655225.trusty.debdiff" https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1655225/+attachment/4811039/+files/lp1655225.trusty.debdiff ** Patch removed: "lp1655225.trusty.debdiff" https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1655225/+attachment/4802219/+files/lp1655225.trusty.debdiff -- 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