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-xaQaPbmZ+pcqFvfgtwTyMnHbMcs6j8KjgVOYBxGzGgoAJ7Q@mail.gmail.com>
Date: Fri, 16 Aug 2024 08:42:43 +0200
From: Andrea Gelmini <andrea.gelmini@...il.com>
To: intelfx@...elfx.name
Cc: Filipe Manana <fdmanana@...nel.org>, Jannik Glückert <jannik.glueckert@...il.com>, 
	dsterba@...e.com, josef@...icpanda.com, linux-btrfs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, mikhail.v.gavrilov@...il.com, 
	regressions@...ts.linux.dev
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 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.

Ciao,
Gelma