Messages in this thread | | | Date | Sat, 22 Oct 2011 16:27:18 +0200 | Subject | Re: [PATCH 0/3] ARM 4Kstacks: introduction | From | "Andi Kleen" <> |
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>> If system run for some time, sometimes it may be difficult for >> memory allocator to allocate 2 continuous page frames even there are >> many spare page frames in system because of >> fragment issue, so the patch does make sense. Anyway, >> it provides one option for user to apply 4k stack to avoid >> such kind of process creation failure. > > Can't page migration be used in these situations?
The kernel already uses it of course, assuming the pages are movable. So if you are really worried about this, just define a movable zone.
-Andi
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