From: Fam Zheng <zhengfeiran@bytedance.com>
To: Yang Shi <shy828301@gmail.com>
Cc: "Fam Zheng" <zhengfeiran@bytedance.com>,
cgroups@vger.kernel.org, "Linux MM" <linux-mm@kvack.org>,
tj@kernel.org, "Johannes Weiner" <hannes@cmpxchg.org>,
lizefan@huawei.com, "Michal Hocko" <mhocko@kernel.org>,
"Vladimir Davydov" <vdavydov.dev@gmail.com>,
duanxiongchun@bytedance.com, 张永肃 <zhangyongsu@bytedance.com>,
liuxiaozhou@bytedance.com
Subject: Re: memory cgroup pagecache and inode problem
Date: Mon, 7 Jan 2019 13:10:17 +0800 [thread overview]
Message-ID: <E2306860-760C-4EB2-92E3-057694971D69@bytedance.com> (raw)
In-Reply-To: <CAHbLzkpbVjtx+uxb1sq-wjBAAv_My6kq4c4bwqRKAmOTZ9dR8g@mail.gmail.com>
> On Jan 5, 2019, at 03:36, Yang Shi <shy828301@gmail.com> wrote:
>
>
> drop_caches would drop all page caches globally. You may not want to
> drop the page caches used by other memcgs.
We’ve tried your async force_empty patch (with a modification to default it to true to make it transparently enabled for the sake of testing), and for the past few days the stale mem cgroups still accumulate, up to 40k.
We’ve double checked that the force_empty routines are invoked when a mem cgroup is offlined. But this doesn’t look very effective so far. Because, once we do `echo 1 > /proc/sys/vm/drop_caches`, all the groups immediately go away.
This is a bit unexpected.
Yang, could you hint what are missing in the force_empty operation, compared to a blanket drop cache?
Fam
next prev parent reply other threads:[~2019-01-07 5:10 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <15614FDC-198E-449B-BFAF-B00D6EF61155@bytedance.com>
2019-01-04 4:44 ` memory cgroup pagecache and inode problem Fam Zheng
2019-01-04 5:00 ` Yang Shi
2019-01-04 5:12 ` Fam Zheng
2019-01-04 19:36 ` Yang Shi
2019-01-07 5:10 ` Fam Zheng [this message]
2019-01-07 8:53 ` Michal Hocko
2019-01-07 9:01 ` Fam Zheng
2019-01-07 9:13 ` Michal Hocko
2019-01-09 4:33 ` Fam Zheng
2019-01-10 5:36 ` Yang Shi
2019-01-10 8:30 ` Fam Zheng
2019-01-10 8:41 ` Michal Hocko
2019-01-16 0:50 ` Yang Shi
2019-01-16 3:52 ` Fam Zheng
2019-01-16 7:06 ` Michal Hocko
2019-01-16 21:08 ` Yang Shi
2019-01-16 21:06 ` Yang Shi
2019-01-17 2:41 ` Fam Zheng
2019-01-17 5:06 ` Yang Shi
2019-01-19 3:17 ` 段熊春
2019-01-20 23:15 ` Shakeel Butt
2019-01-20 23:15 ` Shakeel Butt
2019-01-20 23:20 ` Shakeel Butt
2019-01-21 10:27 ` Michal Hocko
2019-01-04 9:04 ` Michal Hocko
2019-01-04 10:02 ` Fam Zheng
2019-01-04 10:12 ` Michal Hocko
2019-01-04 10:35 ` Fam Zheng
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=E2306860-760C-4EB2-92E3-057694971D69@bytedance.com \
--to=zhengfeiran@bytedance.com \
--cc=cgroups@vger.kernel.org \
--cc=duanxiongchun@bytedance.com \
--cc=hannes@cmpxchg.org \
--cc=linux-mm@kvack.org \
--cc=liuxiaozhou@bytedance.com \
--cc=lizefan@huawei.com \
--cc=mhocko@kernel.org \
--cc=shy828301@gmail.com \
--cc=tj@kernel.org \
--cc=vdavydov.dev@gmail.com \
--cc=zhangyongsu@bytedance.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.