From: Linus Torvalds Date: Wed, 7 Mar 2012 16:21:19 +0000 (-0800) Subject: Revert "CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume" X-Git-Tag: v3.3-rc7~20 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4293f20c19f44ca66e5ac836b411d25e14b9f185;p=pandora-kernel.git Revert "CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume" This reverts commit 8f2f748b0656257153bcf0941df8d6060acc5ca6. It causes some odd regression that we have not figured out, and it's too late in the -rc series to try to figure it out now. As reported by Konstantin Khlebnikov, it causes consistent hangs on his laptop (Thinkpad x220: 2x cores + HT). They can be avoided by adding calls to "rebuild_sched_domains();" in cpuset_cpu_[in]active() for the CPU_{ONLINE/DOWN_FAILED/DOWN_PREPARE}_FROZEN cases, but it's not at all clear why, and it makes no sense. Konstantin's config doesn't even have CONFIG_CPUSETS enabled, just to make things even more interesting. So it's not the cpusets, it's just the scheduling domains. So until this is understood, revert. Bisected-reported-and-tested-by: Konstantin Khlebnikov Acked-by: Peter Zijlstra Acked-by: Ingo Molnar Acked-by: Srivatsa S. Bhat Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed