From: "Michal Koutný" <mkoutny@suse.com>
To: Dan Schatzberg <schatzberg.dan@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"open list:BLOCK LAYER" <linux-block@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:CONTROL GROUP (CGROUP)" <cgroups@vger.kernel.org>,
"open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH 3/3] loop: Charge i/o to mem and blk cg
Date: Fri, 25 Jun 2021 17:01:03 +0200 [thread overview]
Message-ID: <YNXvr81YFzbaTxCb@blackbook> (raw)
In-Reply-To: <20210610173944.1203706-4-schatzberg.dan@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1416 bytes --]
Hi.
On Thu, Jun 10, 2021 at 10:39:44AM -0700, Dan Schatzberg <schatzberg.dan@gmail.com> wrote:
> The current code only associates with the existing blkcg when aio is
> used to access the backing file. This patch covers all types of i/o to
> the backing file and also associates the memcg so if the backing file is
> on tmpfs, memory is charged appropriately.
>
> This patch also exports cgroup_get_e_css and int_active_memcg so it
> can be used by the loop module.
Wouldn't it be clearer to export (not explicitly inlined anymore)
set_active_memcg() instead of the int_active_memcg that's rather an
implementation detail?
> @@ -2111,13 +2112,18 @@ static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx,
> }
>
> /* always use the first bio's css */
> + cmd->blkcg_css = NULL;
> + cmd->memcg_css = NULL;
> #ifdef CONFIG_BLK_CGROUP
> - if (cmd->use_aio && rq->bio && rq->bio->bi_blkg) {
> - cmd->css = &bio_blkcg(rq->bio)->css;
> - css_get(cmd->css);
> - } else
> + if (rq->bio && rq->bio->bi_blkg) {
> + cmd->blkcg_css = &bio_blkcg(rq->bio)->css;
> +#ifdef CONFIG_MEMCG
> + cmd->memcg_css =
> + cgroup_get_e_css(cmd->blkcg_css->cgroup,
> + &memory_cgrp_subsys);
> +#endif
> + }
> #endif
> - cmd->css = NULL;
> loop_queue_work(lo, cmd);
I see you dropped the cmd->blkcg_css reference (while rq is handled). Is
it intentional?
Thanks,
Michal
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2021-06-25 15:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 17:39 [PATCH V14 0/3] Charge loop device i/o to issuing cgroup Dan Schatzberg
2021-06-10 17:39 ` [PATCH 1/3] loop: Use worker per cgroup instead of kworker Dan Schatzberg
2021-06-10 17:39 ` [PATCH 2/3] mm: Charge active memcg when no mm is set Dan Schatzberg
2021-06-25 14:47 ` Michal Koutný
2021-06-10 17:39 ` [PATCH 3/3] loop: Charge i/o to mem and blk cg Dan Schatzberg
2021-06-25 15:01 ` Michal Koutný [this message]
2021-06-28 14:17 ` Dan Schatzberg
2021-06-29 10:26 ` Michal Koutný
2021-06-29 14:03 ` Dan Schatzberg
2021-06-30 9:42 ` Michal Koutný
2021-06-30 14:49 ` Dan Schatzberg
-- strict thread matches above, loose matches on Subject: below --
2021-06-03 14:57 [PATCH V13 0/3] Charge loop device i/o to issuing cgroup Dan Schatzberg
2021-06-03 14:57 ` [PATCH 3/3] loop: Charge i/o to mem and blk cg Dan Schatzberg
2021-04-02 19:16 [PATCH V12 0/3] Charge loop device i/o to issuing cgroup Dan Schatzberg
2021-04-02 19:16 ` [PATCH 3/3] loop: Charge i/o to mem and blk cg Dan Schatzberg
2021-04-06 3:23 ` Ming Lei
2021-03-29 14:48 [PATCH V11 0/3] Charge loop device i/o to issuing cgroup Dan Schatzberg
2021-03-29 14:48 ` [PATCH 3/3] loop: Charge i/o to mem and blk cg Dan Schatzberg
2021-03-16 15:36 [PATCH v10 0/3] Charge loop device i/o to issuing cgroup Dan Schatzberg
2021-03-16 15:36 ` [PATCH 3/3] loop: Charge i/o to mem and blk cg Dan Schatzberg
2021-03-16 16:25 ` Shakeel Butt
2020-08-31 15:36 [PATCH v8 0/3] Charge loop device i/o to issuing cgroup Dan Schatzberg
2020-08-31 15:37 ` [PATCH 3/3] loop: Charge i/o to mem and blk cg Dan Schatzberg
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=YNXvr81YFzbaTxCb@blackbook \
--to=mkoutny@suse.com \
--cc=akpm@linux-foundation.org \
--cc=axboe@kernel.dk \
--cc=cgroups@vger.kernel.org \
--cc=hannes@cmpxchg.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=schatzberg.dan@gmail.com \
/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;
as well as URLs for NNTP newsgroup(s).