On Wed, Dec 04, 2019 at 02:08:14PM +0800, Qu Wenruo wrote:
> On 2019/12/4 下午2:06, Qu Wenruo wrote:
> > Found a strange failure at btrfs-progs selftest misc/016.
> >
> > It hangs at current master 63de37476ebd ("Merge tag
> > 'tag-chrome-platform-for-v5.5' of
> > git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux").
> >
> > What makes it even more mysterious is, misc-5.5 passes.
> >
> > Since there is no other btrfs pull, it's caused by some upstream
> > non-btrfs commits.
>
> BTW, no blocked kernel thread, no CPU usage.
>
> And the hang can be canceled with a signal.
>
> >
> > Doing bisecting, but any clue will be appreciated.
This looks like a problem caused by recent merge of updates to pipe
(commit 6a965666b7e7475c2f8c8e724703db58b8a8a445). I can reproduce that
and now building test kernel before that commit. As this also blocks all
fstests that use send, we have to wait until it's fixed in master
branch.
