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authorAndi Kleen <andi@firstfloor.org>2009-11-17 14:06:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-11-17 17:40:33 -0800
commit6ad696d2cf535772dff659298ec7e7260e344595 (patch)
tree2f4d4d088a7bc8203473dcb96a1d1f0591f3de94 /fs
parent9398180097e359646d46083c3e079a54e20bee82 (diff)
mm: allow memory hotplug and hibernation in the same kernel
Allow memory hotplug and hibernation in the same kernel Memory hotplug and hibernation were exclusive in Kconfig. This is obviously a problem for distribution kernels who want to support both in the same image. After some discussions with Rafael and others the only problem is with parallel memory hotadd or removal while a hibernation operation is in process. It was also working for s390 before. This patch removes the Kconfig level exclusion, and simply makes the memory add / remove functions grab the pm_mutex to exclude against hibernation. Fixes a regression - old kernels didn't exclude memory hotadd and hibernation. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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