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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAL3q7H5AFbSy0JC=u_MAfNR-J_kFQkaG6_pXJimD80tchFXytg@mail.gmail.com>
Date: Thu, 4 Jul 2024 17:38:31 +0100
From: Filipe Manana <fdmanana@...nel.org>
To: Andrea Gelmini <andrea.gelmini@...il.com>
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, Qu Wenruo <wqu@...e.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 Thu, Jul 4, 2024 at 12:19 PM Andrea Gelmini <andrea.gelmini@...il.com> wrote:
>
> 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,

Sorry I have no idea about that. I don't use btrfs-image myself and I
don't think I even ever looked at its source code.
CC'ing Qu who might be interested in that.

I'll reply very soon to the emails about the performance issues that
correlated to related to the shrinker, there are some interesting
things to look for.

Thanks.


> 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.