linux-kernel - Re: [GIT PULL] bcachefs

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Date:   Tue, 27 Jun 2023 18:41:07 -0400
From:   Kent Overstreet <kent.overstreet@...ux.dev>
To:     Dave Chinner <david@...morbit.com>
Cc:     Jens Axboe <axboe@...nel.dk>, torvalds@...ux-foundation.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-bcachefs@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: Re: [GIT PULL] bcachefs

On Wed, Jun 28, 2023 at 08:05:06AM +1000, Dave Chinner wrote:
> On Tue, Jun 27, 2023 at 04:15:24PM -0400, Kent Overstreet wrote:
> > On Tue, Jun 27, 2023 at 11:16:01AM -0600, Jens Axboe wrote:
> > > On 6/26/23 8:59?PM, Jens Axboe wrote:
> > > > On 6/26/23 8:05?PM, Kent Overstreet wrote:
> > > >> On Mon, Jun 26, 2023 at 07:13:54PM -0600, Jens Axboe wrote:
> > > >>> Doesn't reproduce for me with XFS. The above ktest doesn't work for me
> > > >>> either:
> > > >>
> > > >> It just popped for me on xfs, but it took half an hour or so of looping
> > > >> vs. 30 seconds on bcachefs.
> > > > 
> > > > OK, I'll try and leave it running overnight and see if I can get it to
> > > > trigger.
> > > 
> > > I did manage to reproduce it, and also managed to get bcachefs to run
> > > the test. But I had to add:
> > > 
> > > diff --git a/check b/check
> > > index 5f9f1a6bec88..6d74bd4933bd 100755
> > > --- a/check
> > > +++ b/check
> > > @@ -283,7 +283,7 @@ while [ $# -gt 0 ]; do
> > >  	case "$1" in
> > >  	-\? | -h | --help) usage ;;
> > >  
> > > -	-nfs|-afs|-glusterfs|-cifs|-9p|-fuse|-virtiofs|-pvfs2|-tmpfs|-ubifs)
> > > +	-nfs|-afs|-glusterfs|-cifs|-9p|-fuse|-virtiofs|-pvfs2|-tmpfs|-ubifs|-bcachefs)
> > >  		FSTYP="${1:1}"
> > >  		;;
> > >  	-overlay)
> > 
> > I wonder if this is due to an upstream fstests change I haven't seen
> > yet, I'll have a look.
> 
> Run mkfs.bcachefs on the testdir first. fstests tries to probe the
> filesystem type to test if $FSTYP is not set. If it doesn't find a
> filesystem or it is unsupported, it will use the default (i.e. XFS).
> There should be no reason to need to specify the filesystem type for
> filesystems that blkid recognises. from common/config:

Actually ktest already does that, and it sets $FSTYP as well. Jens, are
you sure you weren't doing something funny?