This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- yakkety' to 'verification-done-yakkety'. If the problem still exists, change the tag 'verification-needed-yakkety' to 'verification-failed- yakkety'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-yakkety -- 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/1669023 Title: Kernel: Fix Transactional memory config typo Status in linux package in Ubuntu: Fix Released Status in linux source package in Yakkety: Fix Committed Status in linux source package in Zesty: Fix Released Bug description: Canonical, Please include the following fix on 16.10. This typo is causing some issue on TM. The patches that causes this problem is ec2a04841b785373a6379af66032201a2b90922b on yakkety-ubuntu repo. commit 39715bf972ed4fee18fe5409609a971fb16b1771 Author: Valentin Rothberg <valentinrothb...@gmail.com> Date: Wed Oct 5 07:57:26 2016 +0200 powerpc/process: Fix CONFIG_ALIVEC typo in restore_tm_state() It should be ALTIVEC, not ALIVEC. Cyril explains: If a thread performs a transaction with altivec and then gets preempted for whatever reason, this bug may cause the kernel to not re-enable altivec when that thread runs again. This will result in an altivec unavailable fault, when that fault happens inside a user transaction the kernel has no choice but to enable altivec and doom the transaction. The result is that transactions using altivec may get aborted more often than they should. The difficulty in catching this with a selftest is my deliberate use of the word may above. Optimisations to avoid FPU/altivec/VSX faults mean that the kernel will always leave them on for 255 switches. This code prevents the kernel turning it off if it got to the 256th switch (and userspace was transactional). Fixes: dc16b553c949 ("powerpc: Always restore FPU/VEC/VSX if hardware transactional memory in use") Reviewed-by: Cyril Bur <cyril...@gmail.com> Signed-off-by: Valentin Rothberg <valentinrothb...@gmail.com> Signed-off-by: Michael Ellerman <m...@ellerman.id.au> To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1669023/+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
