Re: softlockup with CONFIG_XFS_ONLINE_SCRUB enabled

Christoph Hellwig
2019-10-28T07:30:09Z

[-- Attachment #1: Type: text/plain, Size: 831 bytes --]

On Sun, Oct 27, 2019 at 11:32:32AM -0700, Darrick J. Wong wrote:
> On Fri, Oct 25, 2019 at 12:24:04PM +0200, Christoph Hellwig wrote:
> > Hi Darrick,
> >
> > the current xfs tree seems to easily cause sotlockups in generic/175
> > (and a few other tests, but not as reproducible) for me. This is on
> > 20GB 4k block size images on a VM with 4 CPUs and 4G of RAM.
>
> Hrm. I haven't seen that before... what's your kernel config?
> This looks like some kind of lockup in slub debugging...?
>
> Also, is this a new thing? Or something that used to happen with low
> frequency but has slowly increased to the point that it's annoying?
>
> (Or something else?)

Seems to happen with 5.3 as well. I only recently turned
CONFIG_XFS_ONLINE_SCRUB back on in my usual test config, that is what
made it show up..

.config attached.

[-- Attachment #2: config.gz --]
[-- Type: application/x-gzip, Size: 32546 bytes --]