From: Tejun Heo <tj@kernel.org>
To: zhong jiang <zhongjiang@huawei.com>
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: Wed, 20 Apr 2016 17:22:51 -0400 [thread overview]
Message-ID: <20160420212251.GF4775@htj.duckdns.org> (raw)
In-Reply-To: <5715DC1F.2020803@huawei.com>
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.
--
tejun
next prev parent reply other threads:[~2016-04-20 21:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-19 7:19 A mainline question about cgroup writeback zhong jiang
2016-04-20 6:32 ` Alex Shi
2016-04-20 21:22 ` Tejun Heo [this message]
2016-04-21 8:40 ` zhong jiang
-- strict thread matches above, loose matches on Subject: below --
2016-04-18 12:53 zhong jiang
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