Messages in this thread |  | | Date | Tue, 13 May 2003 16:29:30 -0700 | From | William Lee Irwin III <> | Subject | Re: Race between vmtruncate and mapped areas? |
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On Tuesday, May 13, 2003 16:20:38 -0700 William Lee Irwin III <wli@holomorphy.com> wrote: >> The mmap_sem works because then ->i_size can't be sampled by >> filemap_nopage() before the pagetable wiping operation starts.
On Tue, May 13, 2003 at 06:28:20PM -0500, Dave McCracken wrote: > So why isn't that the right way to do it? Waiting for mmap_sem guarantees > we won't catch a page fault in flight, which is the cause of the problem in > the first place.
Oh it works fine, it's just the explanation for why it's sufficient I was looking for.
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