Messages in this thread | | | Date | Wed, 11 Oct 2006 11:21:58 +0200 | From | Nick Piggin <> | Subject | Re: [patch 2/5] mm: fault vs invalidate/truncate race fix |
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On Tue, Oct 10, 2006 at 11:00:42PM -0700, Andrew Morton wrote: > On Wed, 11 Oct 2006 15:39:22 +1000 > Nick Piggin <nickpiggin@yahoo.com.au> wrote: > > > But I see that it does read twice. Do you want that behaviour retained? It > > seems like at this level it would be logical to read it once and let lower > > layers take care of any retries? > > argh. Linus has good-sounding reasons for retrying the pagefault-path's > read a single time, but I forget what they are. Something to do with > networked filesystems? (adds cc)
While you're there, can anyone tell me why we want an external ptracer to be able to access pages that are outside i_size? I haven't removed the logic of course, but I'm curious about the history and usage of such a thing.
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