On Thu 27-09-18 06:28:43, Matthew Wilcox wrote:
> On Thu, Sep 27, 2018 at 01:23:32PM +0200, Jan Kara wrote:
> > When dax_lock_mapping_entry() has to sleep to obtain entry lock, it will
> > fail to unlock mapping->i_pages spinlock and thus immediately deadlock
> > against itself when retrying to grab the entry lock again. Fix the
> > problem by unlocking mapping->i_pages before retrying.
>
> It seems weird that xfstests doesn't provoke this ...
The function currently gets called only from mm/memory-failure.c. And yes,
we are lacking DAX hwpoison error tests in fstests...
Honza
--
Jan Kara <[email protected]>
SUSE Labs, CR
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