On Fri, 2002-09-27 at 18:26, Linus Torvalds wrote:
>
> On Fri, 27 Sep 2002, Ingo Molnar wrote:
> >
> > the attached patch implements the virtual => physical cache. Right now
> > only the COW code calls the invalidation function, because futexes do not
> > need notification on unmap.
>
> Ok, looks good. Except you make get_user_page() do a write fault on the
> page, and one of the points of this approach was that that shouldn't even
> be needed. Or did I miss some case that does need it?
get_user_page() cannot/should not ever do a pagefault via the pagefault
code otherwise the coredump code will take the mmap semaphore
recursively and deadlock.
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This archive was generated by hypermail 2b29 : Mon Sep 30 2002 - 22:00:36 EST