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authorRafael J. Wysocki <rjw@sisk.pl>2010-09-11 20:58:27 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2010-09-11 21:03:53 +0200
commit6715045ddc7472a22be5e49d4047d2d89b391f45 (patch)
treed9a48095e915407f6d54db29cfce44c201ae9cef /arch/arm/mach-pxa/cpufreq-pxa2xx.c
parent0109c2c48d062a04685638926a35ed20153fedc8 (diff)
PM / Hibernate: Avoid hitting OOM during preallocation of memory
There is a problem in hibernate_preallocate_memory() that it calls preallocate_image_memory() with an argument that may be greater than the total number of available non-highmem memory pages. If that's the case, the OOM condition is guaranteed to trigger, which in turn can cause significant slowdown to occur during hibernation. To avoid that, make preallocate_image_memory() adjust its argument before calling preallocate_image_pages(), so that the total number of saveable non-highem pages left is not less than the minimum size of a hibernation image. Change hibernate_preallocate_memory() to try to allocate from highmem if the number of pages allocated by preallocate_image_memory() is too low. Modify free_unnecessary_pages() to take all possible memory allocation patterns into account. Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: M. Vefa Bicakci <bicave@superonline.com>
Diffstat (limited to 'arch/arm/mach-pxa/cpufreq-pxa2xx.c')
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