From: Tejun Heo <tj@kernel.org>
To: Shaohua Li <shli@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
gregkh@linuxfoundation.org, hch@lst.de, axboe@fb.com,
rostedt@goodmis.org, lizefan@huawei.com, Kernel-team@fb.com,
Shaohua Li <shli@fb.com>
Subject: Re: [PATCH V3 09/12] block: always attach cgroup info into bio
Date: Mon, 19 Jun 2017 15:09:43 -0400 [thread overview]
Message-ID: <20170619190943.GL12062@htj.duckdns.org> (raw)
In-Reply-To: <1f9bf3d57d5fe644f433844354c9af1aedb8442a.1497549993.git.shli@fb.com>
On Thu, Jun 15, 2017 at 11:17:17AM -0700, Shaohua Li wrote:
> From: Shaohua Li <shli@fb.com>
>
> blkcg_bio_issue_check() already gets blkcg for a BIO.
> bio_associate_blkcg() uses a percpu refcounter, so it's a very cheap
> operation. There is no point we don't attach the cgroup info into bio at
> blkcg_bio_issue_check. This also makes blktrace outputs correct cgroup
> info.
>
> Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2017-06-19 19:09 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-15 18:17 [PATCH V3 00/12] blktrace: output cgroup info Shaohua Li
2017-06-15 18:17 ` [PATCH V3 01/12] kernfs: use idr instead of ida to manage inode number Shaohua Li
2017-06-19 18:52 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 02/12] kernfs: implement i_generation Shaohua Li
2017-06-19 18:52 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 03/12] kernfs: add an API to get kernfs node from inode number Shaohua Li
2017-06-19 18:59 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 04/12] kernfs: don't set dentry->d_fsdata Shaohua Li
2017-06-19 19:00 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 05/12] kernfs: introduce kernfs_node_id Shaohua Li
2017-06-16 14:42 ` kbuild test robot
2017-06-19 19:01 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 06/12] kernfs: add exportfs operations Shaohua Li
2017-06-19 19:07 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 07/12] cgroup: export fhandle info for a cgroup Shaohua Li
2017-06-15 18:17 ` [PATCH V3 08/12] blktrace: export cgroup info in trace Shaohua Li
2017-06-15 18:17 ` [PATCH V3 09/12] block: always attach cgroup info into bio Shaohua Li
2017-06-19 19:09 ` Tejun Heo [this message]
2017-06-15 18:17 ` [PATCH V3 10/12] block: call __bio_free in bio_endio Shaohua Li
2017-06-15 18:17 ` [PATCH V3 11/12] blktrace: add an option to allow displying cgroup path Shaohua Li
2017-06-19 19:14 ` Tejun Heo
2017-06-15 18:17 ` [PATCH V3 12/12] block: use standard blktrace API to output cgroup info for debug notes Shaohua Li
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