Messages in this thread | | | Date | Fri, 23 May 2003 18:47:31 +0100 (BST) | From | Hugh Dickins <> | Subject | Re: [RFC][PATCH] Avoid vmtruncate/mmap-page-fault race |
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On Fri, 23 May 2003, Daniel Phillips wrote: > On Friday 23 May 2003 18:21, Hugh Dickins wrote: > > Sorry, I miss the point of this patch entirely. At the moment it just > > looks like an unattractive rearrangement - the code churn akpm advised > > against - with no bearing on that vmtruncate race. Please correct me. > > This is all about supporting cross-host mmap (nice trick, huh?). Yes, > somebody should post a detailed rfc on that subject.
Ah, thanks - translated into terms that I can understand, so that some ->nopage() not yet in the tree could do something after the install_new_page() returns. Hmm. Can we be sure it's appropriate for install_new_page to drop mm->page_table_lock before it returns?
Hugh
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