** Description changed: + SRU JUSTIFICATION + ================= + + EFFECT + ====== + + Reduce mmap_sem lock contention on arm while using java (see below) + + FIX + === + + see the attached patch + + TEST + ==== + + This commit has already been incorporated/tested in the armadaxp kernel and impacts + only the arm side of master, proposing for P/master (omap4 will get it via + rebase). + + --- + A patch upstream landed on 2011-12-6 that reduces the mmap_sem hold time, which is crucial during OOM killer invocation. It would be very beneficial if this patch could get pulled into all supported arm precise kernels. See http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7178/1 for details on the patch. The upstream git commit is http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8878a539ff19a43cf3729e7562cd528f490246ae I have attached the raw patch as well for review.
** Patch added: "0001-ARM-7178-1-fault.c-Port-OOM-changes-into-do_page_fau.patch" https://bugs.launchpad.net/ubuntu/+source/linux-ti-omap4/+bug/951043/+attachment/3124749/+files/0001-ARM-7178-1-fault.c-Port-OOM-changes-into-do_page_fau.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/951043 Title: Port OOM changes into do_page_fault for arm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/951043/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
