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: <7fca93ba155921cd3d32678899bbfcea58d23da3.camel@intelfx.name>
Date: Fri, 16 Aug 2024 08:47:41 +0200
From: Ivan Shapovalov <intelfx@...elfx.name>
To: Andrea Gelmini <andrea.gelmini@...il.com>
Cc: linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
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 2024-08-16 at 08:42 +0200, Andrea Gelmini wrote:
> Il giorno ven 16 ago 2024 alle ore 01:17 <intelfx@...elfx.name> ha scritto:
> > Can we please have it reverted on the basis of this severe regression,
> > until a better solution is found?
> 
> To disable the shrinker I simply remove two items:
> 
> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index f05cce7c8b8d..4f958ba61e0e 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -2410,8 +2410,6 @@ static const struct super_operations btrfs_super_ops = {
>        .statfs         = btrfs_statfs,
>        .freeze_fs      = btrfs_freeze,
>        .unfreeze_fs    = btrfs_unfreeze,
> -   .nr_cached_objects = btrfs_nr_cached_objects,
> -   .free_cached_objects = btrfs_free_cached_objects,
> };
> 
> static const struct file_operations btrfs_ctl_fops = {
> 
> This is from my thread with Filipe about same topic you can find in
> the mailing list archive.

Yes, that's what I did locally so far, on those systems that I _can_
run custom kernels on. The others I had to downgrade to 6.9 for the
time being. So I do have a vested interest in this being resolved in
the mainline/stable tree :-)

-- 
Ivan Shapovalov / intelfx /

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