Messages in this thread | | | Date | Tue, 17 Aug 2010 16:21:44 +0200 | From | Andi Kleen <> | Subject | Re: [RFC] [PATCH 2/4] dio: add page locking for direct I/O |
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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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