From: Randy Dunlap <rdunlap@infradead.org>
To: Spock <dairinin@gmail.com>,
linux-kernel@vger.kernel.org, Linux MM <linux-mm@kvack.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Roman Gushchin <guro@fb.com>, Rik van Riel <riel@surriel.com>,
Sasha Levin <alexander.levin@microsoft.com>
Subject: Re: Memory management issue in 4.18.15
Date: Sat, 20 Oct 2018 08:37:28 -0700 [thread overview]
Message-ID: <a655c898-0701-f10d-bbf3-8a0090544560@infradead.org> (raw)
In-Reply-To: <CADa=ObrwYaoNFn0x06mvv5W1F9oVccT5qjGM8qFBGNPoNuMUNw@mail.gmail.com>
[add linux-mm mailing list + people]
On 10/20/18 4:41 AM, Spock wrote:
> Hello,
>
> I have a workload, which creates lots of cache pages. Before 4.18.15,
> the behavior was very stable: pagecache is constantly growing until it
> consumes all the free memory, and then kswapd is balancing it around
> low watermark. After 4.18.15, once in a while khugepaged is waking up
> and reclaims almost all the pages from pagecache, so there is always
> around 2G of 8G unused. THP is enabled only for madvise case and are
> not used.
>
> The exact change that leads to current behavior is
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.18.y&id=62aad93f09c1952ede86405894df1b22012fd5ab
>
--
~Randy
next parent reply other threads:[~2018-10-20 15:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CADa=ObrwYaoNFn0x06mvv5W1F9oVccT5qjGM8qFBGNPoNuMUNw@mail.gmail.com>
2018-10-20 15:37 ` Randy Dunlap [this message]
2018-10-20 17:41 ` Roman Gushchin
2018-10-22 8:33 ` Michal Hocko
2018-10-22 15:08 ` Roman Gushchin
2018-10-22 17:01 ` Michal Hocko
2018-10-25 11:26 ` Sasha Levin
2018-10-22 17:35 ` Roman Gushchin
2018-10-22 23:44 ` Roman Gushchin
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