Re: [PATCH 2/4] mm: Send a single IPI to TLB flush multiple pages when unmapping

Rik van Riel
2015-04-16T15:52:49Z

On 04/16/2015 06:22 AM, Mel Gorman wrote:

> If a clean page is unmapped and not immediately flushed, the
> architecture must guarantee that a write to that page from a CPU
> with a cached TLB entry will trap a page fault.
>
> This is essentially what the kernel already depends on but the window is
> much larger with this patch applied and is worth highlighting.

> Signed-off-by: Mel Gorman <mgorman@suse.de>

Given the architectural guarantee ...

Reviewed-by: Rik van Riel <riel@redhat.com>