Messages in this thread | | | Date | Fri, 24 Apr 2015 16:16:52 +0100 | From | Mel Gorman <> | Subject | Re: [RFC PATCH 0/6] TLB flush multiple pages with a single IPI v3 |
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On Fri, Apr 24, 2015 at 04:46:22PM +0200, Vlastimil Babka wrote: > On 04/21/2015 12:41 PM, Mel Gorman wrote: > >Changelog since V2 > >o Ensure TLBs are flushed before pages are freed (mel) > > I admit not reading all the patches thoroughly, but doesn't this > change of ordering mean that you no longer need the architectural > guarantee discussed in patch 2?
No. If we unmap a page to write it to disk then we cannot allow a CPU to write to the physical page being written through a cached entry.
-- Mel Gorman SUSE Labs
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