Messages in this thread | | | Date | Wed, 24 Sep 2014 19:14:21 +0400 | From | Vladimir Davydov <> | Subject | Re: [patch 2/3] mm: memcontrol: simplify detecting when the memory+swap limit is hit |
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On Wed, Sep 24, 2014 at 11:08:57AM -0400, Johannes Weiner wrote: > When attempting to charge pages, we first charge the memory counter > and then the memory+swap counter. If one of the counters is at its > limit, we enter reclaim, but if it's the memory+swap counter, reclaim > shouldn't swap because that wouldn't change the situation. However, > if the counters have the same limits, we never get to the memory+swap > limit. To know whether reclaim should swap or not, there is a state > flag that indicates whether the limits are equal and whether hitting > the memory limit implies hitting the memory+swap limit. > > Just try the memory+swap counter first. > > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Vladimir Davydov <vdavydov@parallels.com>
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