linux-kernel - Re: [GIT PULL] Block pull request for- 4.11-rc1

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Date:   Mon, 20 Feb 2017 08:35:39 +0100
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Bart Van Assche <Bart.VanAssche@...disk.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>,
        Mike Snitzer <snitzer@...hat.com>
Subject: Re: [GIT PULL] Block pull request for- 4.11-rc1

On Sun, Feb 19, 2017 at 06:15:41PM -0700, Jens Axboe wrote:
> I don't think that's a regression in this series, it just triggers more easily
> with this series. The BLOCK_PC removal fixes aren't touching device life times
> at all.

Yes.

> That said, we will look into this again, of course. Christoph, any idea?

No idea really - this seems so far away from the code touched, and there
are no obvious signs for a memory scamble from another object touched
that I think if it really bisects down to that issue it must be a timing
issue.

But reading Bart's message again:  Did you actually bisect it down
to the is commit?  Or just test the whole tree?  Between the 4.10-rc5
merge and all the block tree there might a few more likely suspects
like the scsi bdi lifetime fixes that James mentioned.