From: Tejun Heo <tj@kernel.org>
To: Roman Gushchin <guro@fb.com>
Cc: Jan Kara <jack@suse.cz>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Alexander Viro <viro@zeniv.linux.org.uk>,
Dennis Zhou <dennis@kernel.org>,
Dave Chinner <dchinner@redhat.com>,
cgroups@vger.kernel.org
Subject: Re: [PATCH v7 0/6] cgroup, blkcg: prevent dirty inodes to pin dying memory cgroups
Date: Fri, 4 Jun 2021 11:53:02 -0400 [thread overview]
Message-ID: <YLpMXmWvPsIK97ZE@slm.duckdns.org> (raw)
In-Reply-To: <20210604013159.3126180-1-guro@fb.com>
On Thu, Jun 03, 2021 at 06:31:53PM -0700, Roman Gushchin wrote:
> To solve the problem inodes should be eventually detached from the
> corresponding writeback structure. It's inefficient to do it after
> every writeback completion. Instead it can be done whenever the
> original memory cgroup is offlined and writeback structure is getting
> killed. Scanning over a (potentially long) list of inodes and detach
> them from the writeback structure can take quite some time. To avoid
> scanning all inodes, attached inodes are kept on a new list (b_attached).
> To make it less noticeable to a user, the scanning and switching is performed
> from a work context.
Sorry for chiming in late but the series looks great to me and the only
comment I have is the migration target on the last patch, which isn't a
critical issue. Please feel free to add
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Roman Gushchin <guro-b10kYP2dOMg@public.gmane.org>
Cc: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
Alexander Viro
<viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
Dennis Zhou <dennis-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Dave Chinner <dchinner-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v7 0/6] cgroup, blkcg: prevent dirty inodes to pin dying memory cgroups
Date: Fri, 4 Jun 2021 11:53:02 -0400 [thread overview]
Message-ID: <YLpMXmWvPsIK97ZE@slm.duckdns.org> (raw)
In-Reply-To: <20210604013159.3126180-1-guro-b10kYP2dOMg@public.gmane.org>
On Thu, Jun 03, 2021 at 06:31:53PM -0700, Roman Gushchin wrote:
> To solve the problem inodes should be eventually detached from the
> corresponding writeback structure. It's inefficient to do it after
> every writeback completion. Instead it can be done whenever the
> original memory cgroup is offlined and writeback structure is getting
> killed. Scanning over a (potentially long) list of inodes and detach
> them from the writeback structure can take quite some time. To avoid
> scanning all inodes, attached inodes are kept on a new list (b_attached).
> To make it less noticeable to a user, the scanning and switching is performed
> from a work context.
Sorry for chiming in late but the series looks great to me and the only
comment I have is the migration target on the last patch, which isn't a
critical issue. Please feel free to add
Acked-by: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2021-06-04 15:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 1:31 [PATCH v7 0/6] cgroup, blkcg: prevent dirty inodes to pin dying memory cgroups Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-04 1:31 ` [PATCH v7 1/6] writeback, cgroup: do not switch inodes with I_WILL_FREE flag Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-07 8:48 ` Jan Kara
2021-06-07 8:48 ` Jan Kara
2021-06-04 1:31 ` [PATCH v7 2/6] writeback, cgroup: switch to rcu_work API in inode_switch_wbs() Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-04 1:31 ` [PATCH v7 3/6] writeback, cgroup: keep list of inodes attached to bdi_writeback Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-04 1:31 ` [PATCH v7 4/6] writeback, cgroup: split out the functional part of inode_switch_wbs_work_fn() Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-04 1:31 ` [PATCH v7 5/6] writeback, cgroup: support switching multiple inodes at once Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-07 9:00 ` Jan Kara
2021-06-07 9:00 ` Jan Kara
2021-06-04 1:31 ` [PATCH v7 6/6] writeback, cgroup: release dying cgwbs by switching attached inodes Roman Gushchin
2021-06-04 1:31 ` Roman Gushchin
2021-06-04 15:51 ` Tejun Heo
2021-06-04 15:51 ` Tejun Heo
2021-06-05 21:34 ` Dennis Zhou
2021-06-08 0:20 ` Roman Gushchin
2021-06-08 0:20 ` Roman Gushchin
2021-06-07 9:24 ` Jan Kara
2021-06-07 9:24 ` Jan Kara
2021-06-04 15:53 ` Tejun Heo [this message]
2021-06-04 15:53 ` [PATCH v7 0/6] cgroup, blkcg: prevent dirty inodes to pin dying memory cgroups Tejun Heo
2021-06-04 22:24 ` Roman Gushchin
2021-06-04 22:24 ` Roman Gushchin
2021-06-04 23:31 ` Tejun Heo
2021-06-04 23:31 ` Tejun Heo
2021-06-05 21:37 ` Dennis Zhou
2021-06-05 21:37 ` Dennis Zhou
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