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

[Qu Wenruo]

在 2024/7/5 02:08, Filipe Manana 写道:
> On Thu, Jul 4, 2024 at 12:19 PM Andrea Gelmini <andrea.gelmini@xxxxxxxxx> wrote:
> > Il giorno gio 4 lug 2024 alle ore 11:49 Filipe Manana
> > <fdmanana@xxxxxxxxxx> 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.

That's the nature of "-s" option unfortunately.

Tree-checker has extra sanity checks to ensure the hash matches the name.

I think it's a little overkilled for image dump, would fix it soon.

Thanks,
Qu

> 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.