From: zhong jiang <zhongjiang@huawei.com>
To: <tj@kernel.org>
Cc: <lizefan@huawei.com>, <miaoxie@huawei.com>,
<dingxiang@huawei.com>, LKML <linux-kernel@vger.kernel.org>
Subject: A mainline question about cgroup writeback
Date: Mon, 18 Apr 2016 20:53:53 +0800 [thread overview]
Message-ID: <5714D8E1.2000004@huawei.com> (raw)
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
Furthering test find that the ratelimit will be limited if it write data
to disk directly. Additionly, The read ratelimit is limited whther it go through
the page cache or not.
next reply other threads:[~2016-04-18 12:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-18 12:53 zhong jiang [this message]
-- strict thread matches above, loose matches on Subject: below --
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
2016-04-21 8:40 ` zhong jiang
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