linux-kernel - 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

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Message-ID: <CAK-xaQYwgOKkeD4HvMtNqNqqchW4aS2gtvzGJ-yKwfE6uaUYng@mail.gmail.com>
Date: Fri, 5 Jul 2024 08:30:31 +0200
From: Andrea Gelmini <andrea.gelmini@...il.com>
To: Filipe Manana <fdmanana@...nel.org>
Cc: Mikhail Gavrilov <mikhail.v.gavrilov@...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

Il giorno gio 4 lug 2024 alle ore 19:25 Filipe Manana
<fdmanana@...nel.org> ha scritto:
> 1) First let's check that the problem is really a consequence of the shrinker.
>     Try this patch:
>
>     https://gist.githubusercontent.com/fdmanana/b44abaade0000d28ba0e1e1ae3ac4fee/raw/5c9bf0beb5aa156b893be2837c9244d035962c74/gistfile1.txt
>
>     This disables the shrinker. This is just to confirm if I'm looking
> in the right direction, if your problem is the same as Mikhail's and
> double check his bisection.

Ok, so, I confirm. With this change, just a little bit of PSI memory
sometime (<3%), but no skyrocket. Also, tar at full speed.

Now, I'm going to prepare the btrfs image to send you.

The other steps later.