Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen

Rik van Riel
2009-05-07T15:08:05Z

Christoph Lameter wrote:
> On Thu, 7 May 2009, Peter Zijlstra wrote:
>
>
>> It re-instates the young bit for PROT_EXEC pages, so that they will only
>> be paged when they are really cold, or there is severe pressure.
>>
>
> But they are rescanned until then. Really cold means what exactly? I do a
> back up of a few hundred gigabytes and do not use firefox while the backup
> is ongoing. Will the firefox pages still be in memory or not?
>
The patch with the subject "[PATCH] vmscan: evict use-once pages first (v3)"
together with this patch should make sure that it stays in memory.