Messages in this thread |  | | Date | Fri, 4 Jan 2013 17:05:40 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCH 1/2] Add mempressure cgroup |
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On Fri, Jan 04, 2013 at 12:29:11AM -0800, Anton Vorontsov wrote: > This commit implements David Rientjes' idea of mempressure cgroup. > > The main characteristics are the same to what I've tried to add to vmevent > API; internally, it uses Mel Gorman's idea of scanned/reclaimed ratio for > pressure index calculation. But we don't expose the index to the userland. > Instead, there are three levels of the pressure: > > o low (just reclaiming, e.g. caches are draining); > o medium (allocation cost becomes high, e.g. swapping); > o oom (about to oom very soon). > > The rationale behind exposing levels and not the raw pressure index > described here: http://lkml.org/lkml/2012/11/16/675 > > For a task it is possible to be in both cpusets, memcg and mempressure > cgroups, so by rearranging the tasks it is possible to watch a specific > pressure (i.e. caused by cpuset and/or memcg). > > Note that while this adds the cgroups support, the code is well separated > and eventually we might add a lightweight, non-cgroups API, i.e. vmevent. > But this is another story. > > Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
-- Kirill A. Shutemov
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