From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, Christoph Lameter <cl@linux.com>,
linux-mm@kvack.org
Subject: Re: [PATCH] mm/vmstat: retrieve more accurate vmstat value
Date: Thu, 26 Nov 2015 10:56:12 +0900 [thread overview]
Message-ID: <20151126015612.GB13138@js1304-P5Q-DELUXE> (raw)
In-Reply-To: <20151125120021.GA27342@dhcp22.suse.cz>
On Wed, Nov 25, 2015 at 01:00:22PM +0100, Michal Hocko wrote:
> On Tue 24-11-15 15:22:03, Joonsoo Kim wrote:
> > When I tested compaction in low memory condition, I found that
> > my benchmark is stuck in congestion_wait() at shrink_inactive_list().
> > This stuck last for 1 sec and after then it can escape. More investigation
> > shows that it is due to stale vmstat value. vmstat is updated every 1 sec
> > so it is stuck for 1 sec.
>
> Wouldn't it be sufficient to use zone_page_state_snapshot in
> too_many_isolated?
Yes, it would work in this case. But, I prefer this patch because
all zone_page_state() users get this benefit.
Thanks.
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next prev parent reply other threads:[~2015-11-26 1:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-24 6:22 Joonsoo Kim
2015-11-24 15:36 ` Christoph Lameter
2015-11-25 2:57 ` Joonsoo Kim
2015-11-25 16:04 ` Christoph Lameter
2015-11-25 18:03 ` Michal Hocko
2015-11-25 18:26 ` Christoph Lameter
2015-11-26 1:52 ` Joonsoo Kim
2015-12-03 4:14 ` Joonsoo Kim
2016-01-27 23:13 ` David Rientjes
2016-01-28 5:08 ` Joonsoo Kim
2015-11-25 12:00 ` Michal Hocko
2015-11-25 13:43 ` Vlastimil Babka
2015-11-25 13:47 ` Michal Hocko
2015-11-26 1:56 ` Joonsoo Kim [this message]
2015-11-26 5:03 ` vinayak menon
2015-11-26 15:03 ` Michal Hocko
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