mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: zhong jiang <zhongjiang@huawei.com>
To: Tejun Heo <tj@kernel.org>
Cc: Miao Xie <miaoxie@huawei.com>, <lizefan@huawei.com>,
	<dingxiang@huawei.com>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: A mainline question about cgroup writeback
Date: Thu, 21 Apr 2016 16:40:00 +0800	[thread overview]
Message-ID: <571891E0.60703@huawei.com> (raw)
In-Reply-To: <20160420212251.GF4775@htj.duckdns.org>

On 2016/4/21 5:22, Tejun Heo wrote:
> On Tue, Apr 19, 2016 at 03:19:59PM +0800, zhong jiang wrote:
>> cgroup writeback support the filesystem both ext4 and ext2.
>> but,  it appears to be not work when I test the function in the ext4.
>> The example is as follows:
>> echo "8:0 1048576" > blkio.throttle.write_bps_device
>> echo $$ > cgroup.procs
>> dd if=/dev/zero of=/test.c bs=1M count=10240
>> 10240+0 records in
>> 10240+0 records out
>> 10737418240 bytes (11 GB) copied, 49.8796 s, 215 MB/s
> How much memory does the cgroup have available to it?  It's buffered
> write.  It might not get throttled if there are enough pages to dirty.
>
> Thanks.
>
  Maybe it's my fault.  I just limit two fields in dirty_background_bytes and dirty_bytes , 
  and I don't consider about  the available memory in the cgroup.


 Thanks
 zhongjiang

  reply	other threads:[~2016-04-21  8:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-19  7:19 zhong jiang
2016-04-20  6:32 ` Alex Shi
2016-04-20 21:22 ` Tejun Heo
2016-04-21  8:40   ` zhong jiang [this message]
  -- strict thread matches above, loose matches on Subject: below --
2016-04-18 12:53 zhong jiang

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=571891E0.60703@huawei.com \
    --to=zhongjiang@huawei.com \
    --cc=dingxiang@huawei.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lizefan@huawei.com \
    --cc=miaoxie@huawei.com \
    --cc=tj@kernel.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome