From: Tejun Heo <tj@kernel.org>
To: Shaohua Li <shli@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
lizefan@huawei.com, tglx@linutronix.de, kernel-team@fb.com,
axboe@kernel.dk, Shaohua Li <shli@fb.com>
Subject: Re: [PATCH 3/3] block/loop: make loop cgroup aware
Date: Fri, 8 Sep 2017 07:48:09 -0700 [thread overview]
Message-ID: <20170908144808.GA1774378@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <83915a4be672d99729029800196008c3b39c7a3a.1504748195.git.shli@fb.com>
Hello,
On Wed, Sep 06, 2017 at 07:00:53PM -0700, Shaohua Li wrote:
> diff --git a/drivers/block/loop.c b/drivers/block/loop.c
> index 9d4545f..9850b27 100644
> --- a/drivers/block/loop.c
> +++ b/drivers/block/loop.c
> @@ -482,6 +482,8 @@ static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
> {
> struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
>
> + if (cmd->css)
> + css_put(cmd->css);
> cmd->ret = ret > 0 ? 0 : ret;
> lo_rw_aio_do_completion(cmd);
The fact that we're forwarding explicitly in loop still bothers me a
bit. Can you please elaborate why we don't want to do this
generically through aio?
Thanks.
--
tejun
next prev parent reply other threads:[~2017-09-08 14:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-07 2:00 [PATCH 0/3] block: make loop block device cgroup aware Shaohua Li
2017-09-07 2:00 ` [PATCH 1/3] kthread: add a mechanism to store cgroup info Shaohua Li
2017-09-08 14:35 ` Tejun Heo
2017-09-08 14:38 ` Tejun Heo
2017-09-08 14:40 ` Tejun Heo
2017-09-08 16:51 ` Shaohua Li
2017-09-07 2:00 ` [PATCH 2/3] block: make blkcg aware of kthread stored original " Shaohua Li
2017-09-08 14:41 ` Tejun Heo
2017-09-07 2:00 ` [PATCH 3/3] block/loop: make loop cgroup aware Shaohua Li
2017-09-08 14:48 ` Tejun Heo [this message]
2017-09-08 17:07 ` Shaohua Li
2017-09-08 17:54 ` Tejun Heo
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