Messages in this thread | | | Date | Tue, 1 May 2012 16:49:55 +1000 | Subject | Re: [PATCH] Describe race of direct read and fork for unaligned buffers | From | Nick Piggin <> |
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On 30 April 2012 19:30, Jan Kara <jack@suse.cz> wrote: > This is a long standing problem (or a surprising feature) in our implementation > of get_user_pages() (used by direct IO). Since several attempts to fix it > failed (e.g. > http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-04/msg06542.html, or > http://lkml.indiana.edu/hypermail/linux/kernel/0903.1/01498.html refused in > http://comments.gmane.org/gmane.linux.kernel.mm/31569) and it's not completely > clear whether we really want to fix it given the costs, let's at least document > it.
In any case, it should be documented even if it is ever fixed in newer kernels. Thanks!
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