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authorLinus Torvalds <torvalds@linux-foundation.org>2012-09-12 07:16:54 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-09-12 07:16:54 +0800
commit0bd1189e239c76eb3a50e458548fbe7e4a5dfff1 (patch)
tree8c46cfcd8ab9d94bbcfaaf5969a79b6b11914042 /drivers/scsi/isci
parent274a2f5ddb3e8bf67e561574e6529a65a4039240 (diff)
parentee378aa49b594da9bda6a2c768cc5b2ad585f911 (diff)
downloadlinux-linaro-stable-0bd1189e239c76eb3a50e458548fbe7e4a5dfff1.tar.gz
Merge branch 'for-3.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fixes from Tejun Heo: "It's later than I'd like but well the timing just didn't work out this time. There are three bug fixes. One from before 3.6-rc1 and two from the new CPU hotplug code. Kudos to Lai for discovering all of them and providing fixes. * Atomicity bug when clearing a flag and setting another. The two operation should have been atomic but wasn't. This bug has existed for a long time but is unlikely to have actually happened. Fix is safe. Marked for -stable. * If CPU hotplug cycles happen back-to-back before workers finish the previous cycle, the states could get out of sync and it could get stuck. Fixed by waiting for workers to complete before finishing hotplug cycle. * While CPU hotplug is in progress, idle workers could be depleted which can then lead to deadlock. I think both happening together is highly unlikely but still better to fix it and the fix isn't too scary. There's another workqueue related regression which reported a few days ago: https://bugzilla.kernel.org/show_bug.cgi?id=47301 It's a bit of head scratcher but there is a semi-reliable reproduce case, so I'm hoping to resolve it soonish." * 'for-3.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: fix possible idle worker depletion across CPU hotplug workqueue: restore POOL_MANAGING_WORKERS workqueue: fix possible deadlock in idle worker rebinding workqueue: move WORKER_REBIND clearing in rebind_workers() to the end of the function workqueue: UNBOUND -> REBIND morphing in rebind_workers() should be atomic
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