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-xaQagqS0kePozkim7sB_Zi+8NrDRnbqFuLVQ3s4F+0WZ+DQ@mail.gmail.com>
Date: Thu, 4 Jul 2024 13:18:46 +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 11:49 Filipe Manana
<fdmanana@...nel.org> ha scritto:
> I'll try that soon and see if I can reproduce.

I'm creating a qcow installation with everything, to replicate this.
Sorry, it takes time.

By the way, it's just me? (latest git master btrfs-progs)
 btrfs-image /dev/blah-blah loop.dd
works perfectly, but
  btrfs-image -s  /dev/blah-blah loop.dd
generate an image impossible to mount:
[gio lug  4 11:20:05 2024] BTRFS info (device loop40): first mount of
filesystem 496b800d-2f32-46bb-b8d0-03d6f71cf4b2
[gio lug  4 11:20:05 2024] BTRFS info (device loop40): using crc32c
(crc32c-intel) checksum algorithm
[gio lug  4 11:20:05 2024] BTRFS info (device loop40): using free space tree
[gio lug  4 11:20:05 2024] BTRFS critical (device loop40): corrupt
leaf: root=1 block=40297906176 slot=6 ino=6, name hash mismatch with
key,
have 0x00000000365ce506 expect 0x000000008dbfc2d2
[gio lug  4 11:20:05 2024] BTRFS error (device loop40): read time tree
block corruption detected on logical 40297906176 mirror 1
[gio lug  4 11:20:05 2024] BTRFS critical (device loop40): corrupt
leaf: root=1 block=40297906176 slot=6 ino=6, name hash mismatch with
key,
have 0x00000000365ce506 expect 0x000000008dbfc2d2
[gio lug  4 11:20:05 2024] BTRFS error (device loop40): read time tree
block corruption detected on logical 40297906176 mirror 2
[gio lug  4 11:20:05 2024] BTRFS warning (device loop40): couldn't
read tree root
[gio lug  4 11:20:05 2024] BTRFS error (device loop40): open_ctree failed

> In the meanwhile, just curious: are you using swapfiles on btrfs?

never used on BTRFS (i have a dedicated nvme partition).

Same effect also disabling the swap, btw, and thp.