From: Michal Hocko <mhocko@kernel.org>
To: Wang Long <wanglong19@meituan.com>
Cc: hannes@cmpxchg.org, vdavydov.dev@gmail.com,
aryabinin@virtuozzo.com, akpm@linux-foundation.org,
khlebnikov@yandex-team.ru, xboe@kernel.dk, jack@suse.cz,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
gthelen@google.com, tj@kernel.org
Subject: Re: [PATCH v2] memcg: writeback: use memcg->cgwb_list directly
Date: Fri, 27 Apr 2018 13:46:03 +0200 [thread overview]
Message-ID: <20180427114603.GG17484@dhcp22.suse.cz> (raw)
In-Reply-To: <1524406173-212182-1-git-send-email-wanglong19@meituan.com>
On Sun 22-04-18 22:09:33, Wang Long wrote:
> mem_cgroup_cgwb_list is a very simple wrapper and it will
> never be used outside of code under CONFIG_CGROUP_WRITEBACK.
> so use memcg->cgwb_list directly.
Thanks for adding the changelog
> Reviewed-by: Jan Kara <jack@suse.cz>
> Signed-off-by: Wang Long <wanglong19@meituan.com>
Acked-by: Michal Hocko <mhocko@suse.com>
> ---
> include/linux/memcontrol.h | 1 -
> mm/backing-dev.c | 4 ++--
> mm/memcontrol.c | 5 -----
> 3 files changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
> index d99b71b..c0056e0 100644
> --- a/include/linux/memcontrol.h
> +++ b/include/linux/memcontrol.h
> @@ -1093,7 +1093,6 @@ static inline void dec_lruvec_page_state(struct page *page,
>
> #ifdef CONFIG_CGROUP_WRITEBACK
>
> -struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
> struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
> void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
> unsigned long *pheadroom, unsigned long *pdirty,
> diff --git a/mm/backing-dev.c b/mm/backing-dev.c
> index 023190c..0a48e05 100644
> --- a/mm/backing-dev.c
> +++ b/mm/backing-dev.c
> @@ -555,7 +555,7 @@ static int cgwb_create(struct backing_dev_info *bdi,
> memcg = mem_cgroup_from_css(memcg_css);
> blkcg_css = cgroup_get_e_css(memcg_css->cgroup, &io_cgrp_subsys);
> blkcg = css_to_blkcg(blkcg_css);
> - memcg_cgwb_list = mem_cgroup_cgwb_list(memcg);
> + memcg_cgwb_list = &memcg->cgwb_list;
> blkcg_cgwb_list = &blkcg->cgwb_list;
>
> /* look up again under lock and discard on blkcg mismatch */
> @@ -734,7 +734,7 @@ static void cgwb_bdi_unregister(struct backing_dev_info *bdi)
> */
> void wb_memcg_offline(struct mem_cgroup *memcg)
> {
> - struct list_head *memcg_cgwb_list = mem_cgroup_cgwb_list(memcg);
> + struct list_head *memcg_cgwb_list = &memcg->cgwb_list;
> struct bdi_writeback *wb, *next;
>
> spin_lock_irq(&cgwb_lock);
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index e074f7c..d1adb9c 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -3562,11 +3562,6 @@ static int mem_cgroup_oom_control_write(struct cgroup_subsys_state *css,
>
> #ifdef CONFIG_CGROUP_WRITEBACK
>
> -struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg)
> -{
> - return &memcg->cgwb_list;
> -}
> -
> static int memcg_wb_domain_init(struct mem_cgroup *memcg, gfp_t gfp)
> {
> return wb_domain_init(&memcg->cgwb_domain, gfp);
> --
> 1.8.3.1
--
Michal Hocko
SUSE Labs
prev parent reply other threads:[~2018-04-27 11:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-22 14:09 [PATCH v2] memcg: writeback: use memcg->cgwb_list directly Wang Long
2018-04-26 18:54 ` Tejun Heo
2018-04-27 11:46 ` Michal Hocko [this message]
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=20180427114603.GG17484@dhcp22.suse.cz \
--to=mhocko@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=aryabinin@virtuozzo.com \
--cc=gthelen@google.com \
--cc=hannes@cmpxchg.org \
--cc=jack@suse.cz \
--cc=khlebnikov@yandex-team.ru \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=tj@kernel.org \
--cc=vdavydov.dev@gmail.com \
--cc=wanglong19@meituan.com \
--cc=xboe@kernel.dk \
/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).