From: Konstantin Khorenko <khorenko@virtuozzo.com>
To: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>,
Vasileios Almpanis <vasileios.almpanis@virtuozzo.com>
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH hci-8.1 0/4] sched: restore Container iowait accounting
Date: Tue, 20 Oct 2026 15:06:36 +0200 [thread overview]
Message-ID: <179250159624.3627828.6132693542815643679.b4-ty@b4> (raw)
In-Reply-To: <20261014-ct-iowait-v1-0-9d65fe37cf89@virtuozzo.com>
On Wed, 14 Oct 2026 11:16:23 +0000, Vasileios Almpanis wrote:
> sched: restore Container iowait accounting
>
> Container iowait is always 0 on vz10, both in cpu.proc.stat and in the
> CT's /proc/stat, so top inside a CT shows 0 wa.
>
> Two things are broken. cfs_rq::nr_iowait goes out of balance on a few
> paths, and the group entity never gets sleep_start/block_start, so
> neither idle nor iowait is accounted for the group. The counter has to
> be fixed first, otherwise the groups would look blocked forever.
>
> [...]
Applied to branch-rh10-6.12.0-211.52.1.22.x.vz10-ovz, will be released in rh10-6.12.0-211.52.1.22.9.vz10, thanks!
[1/4] sched: fix cfs_rq::nr_iowait leak on the remote wakeup path
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/d9432bac2620
[2/4] sched: keep cfs_rq::nr_iowait balanced for throttled and class changing tasks
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/df90c35e9848
[3/4] sched: account sleep and block time of a task group entity
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/544bf5f61fc1
[4/4] sched: switch a sleeping task group entity between idle and iowait
https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/ed6900fdc06c
--
Konstantin Khorenko <khorenko@virtuozzo.com>
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next prev parent reply other threads:[~2026-10-20 13:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-14 11:16 Vasileios Almpanis
2026-10-14 11:16 ` [Devel] [PATCH hci-8.1 1/4] sched: fix cfs_rq::nr_iowait leak on the remote wakeup path Vasileios Almpanis
2026-10-14 11:23 ` no-reply
2026-10-14 11:16 ` [Devel] [PATCH hci-8.1 2/4] sched: keep cfs_rq::nr_iowait balanced for throttled and class changing tasks Vasileios Almpanis
2026-10-14 11:24 ` no-reply
2026-10-14 11:16 ` [Devel] [PATCH hci-8.1 3/4] sched: account sleep and block time of a task group entity Vasileios Almpanis
2026-10-14 11:28 ` no-reply
2026-10-14 11:36 ` Vasileios Almpanis
2026-10-14 11:16 ` [Devel] [PATCH hci-8.1 4/4] sched: switch a sleeping task group entity between idle and iowait Vasileios Almpanis
2026-10-14 11:27 ` no-reply
2026-10-20 13:06 ` Konstantin Khorenko [this message]
2026-10-20 13:09 ` [Devel] [PATCH hci-8.1 0/4] sched: restore Container iowait accounting Konstantin Khorenko
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