Messages in this thread | | | Date | Fri, 8 Jan 2010 09:25:14 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [RFC][PATCH 6/8] mm: handle_speculative_fault() |
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On Fri, 8 Jan 2010 09:23:33 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> On Thu, 7 Jan 2010 14:33:50 -0800 (PST) > Linus Torvalds <torvalds@linux-foundation.org> wrote: > > > > > > > On Thu, 7 Jan 2010, Peter Zijlstra wrote: > > > > > > I haven't yet looked at the patch, but isn't expand_stack() kinda like > > > what you want? That serializes using anon_vma_lock(). > > > > Yeah, that sounds like the right thing to do. It is the same operation, > > after all (and has the same effects, especially for the special case of > > upwards-growing stacks). > > > > So basically the idea is to extend that stack expansion to brk(), and > > possibly mmap() in general. > > > Hmm, do_brk() sometimes unmap conflicting mapping. Isn't it be a problem ? > Stack expansion just fails and SEGV if it hit with other mmaps.... Sorry please ignore the last line...
Sorry for noise. -Kame
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