linux-ext4 - Re: [PATCH v4 1/2] dax: dax_layout_busy

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Message-ID: <20180824154443.GA26549@quack2.suse.cz>
Date:   Fri, 24 Aug 2018 17:44:43 +0200
From:   Jan Kara <jack@...e.cz>
To:     "Theodore Y. Ts'o" <tytso@....edu>
Cc:     sandeen@...hat.com, Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Jan Kara <jack@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Christoph Hellwig <hch@....de>, linux-nvdimm@...ts.01.org,
        Jeff Moyer <jmoyer@...hat.com>, linux-ext4@...r.kernel.org,
        Lukas Czerner <lczerner@...hat.com>
Subject: Re: [PATCH v4 1/2] dax: dax_layout_busy_page() warn on !exceptional

On Mon 13-08-18 12:12:52, Jan Kara wrote:
> On Fri 10-08-18 22:10:53, Theodore Y. Ts'o wrote:
> > The generic/344 failure seems to be caused by a WARNING triggered in
> > the nvdimm code:
> 
> OK, apparently this is nothing new for you as generic/344 fails for you
> even with 3.17. But it should not :). I'll try to see if I can reproduce
> this in my test setup during more test runs (I don't remember seeing it
> during occasional runs I do) and debug it further.

I could reproduce this relatively easily but it took me quite a while to
figure out how to best fix this. I'll send the fix shortly (mm: Fix warning
in insert_pfn()).

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR