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SubjectRe: [RFC] [PATCH 2/4] dio: add page locking for direct I/O
On Tue, Aug 17, 2010 at 09:46:56AM -0400, Jeff Moyer wrote:
> Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> writes:
>
> > BTW, from the discussion with Christoph I noticed my misunderstanding
> > about the necessity of additional page locking. It would seem that
> > without page locking there is no danger of racing between direct I/O and
> > page migration. So I retract this additional locking patch-set.
>
> OK, great! ;-)

Well it sounds like we still may need something. It isn't good if O_DIRECT
can starve (or DoS) migration.

-Andi
--
ak@linux.intel.com -- Speaking for myself only.


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