Messages in this thread | | | Date | Thu, 27 May 2010 10:09:00 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 5/5] extend KSM refcounts to the anon_vma root |
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On 05/27/2010 10:02 AM, Minchan Kim wrote:
> Hmm, I can understand this point. > Now, rmap code always depeneds on root anon_vma's lock. > I think it doesn't depends on KSM and MIGRATION. > > If we don't use KSM and MIGRATION and it is compiled out, > Can root's anon_vma disappear during rmap walking? > who prevent it? > > What am I missing?
unlink_anon_vmas walks the list in the order from newest to oldest, ie. the root always gets unlinked (and potentially freed) last.
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