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Message-ID: <CAL3q7H5zfQNS1qy=jAAZa-7w088Q1K-R7+asj-f++6=N8skWzg@mail.gmail.com>
Date: Wed, 10 Jul 2024 11:53:20 +0100
From: Filipe Manana <fdmanana@...nel.org>
To: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
Cc: Andrea Gelmini <andrea.gelmini@...il.com>,
Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
Linux regressions mailing list <regressions@...ts.linux.dev>, Btrfs BTRFS <linux-btrfs@...r.kernel.org>,
dsterba@...e.com, josef@...icpanda.com
Subject: Re: 6.10/regression/bisected - after f1d97e769152 I spotted increased
execution time of the kswapd0 process and symptoms as if there is not enough memory
On Wed, Jul 10, 2024 at 10:24 AM Mikhail Gavrilov
<mikhail.v.gavrilov@...il.com> wrote:
>
> On Mon, Jul 8, 2024 at 7:16 PM Filipe Manana <fdmanana@...nel.org> wrote:
> >
> > That's weird, I think you might be observing some variance.
> > I noticed that too for your reports of the test2 branch and the old
> > test3 branch, which were very identical, yet you got a very
> > significant difference between them.
> >
> > Thanks.
> >
>
> up 1:00
> root 269 10.2 0.0 0 0 ? S 10:06 6:13 [kswapd0]
> up 2:01
> root 269 9.1 0.0 0 0 ? S 10:06 11:07 [kswapd0]
> up 3:00
> root 269 8.4 0.0 0 0 ? R 10:06 15:18 [kswapd0]
> up 4:21
> root 269 11.7 0.0 0 0 ? S 10:06 30:33 [kswapd0]
> up 5:01
> root 269 11.7 0.0 0 0 ? S 10:06 35:19 [kswapd0]
> up 6:27
> root 269 11.5 0.0 0 0 ? S 10:06 44:39 [kswapd0]
> up 7:00
> root 269 11.2 0.0 0 0 ? R 10:06 47:18 [kswapd0]
>
> The measurement error can reach ±10 min.
> Did you plan to merge the fix before the 6.10 release?
I've submitted a patchset with the goal to apply against 6.10 (see the
notes there in the cover letter):
https://lore.kernel.org/linux-btrfs/cover.1720448663.git.fdmanana@suse.com/
But it's up to David to submit to Linus, as he's the maintainer.
Though I haven't heard from him yet.
I plan at least one more improvement for the shrinker, but I would
like to know too if those patches go into 6.10 before it's released or
not,
because there are conflicts with the for-next branch.
> --
> Best Regards,
> Mike Gavrilov.
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