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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 19 Apr 2011 09:32:36 -0700
Message-ID: <BANLkTikzRE7sA8_NNgVUpOqR_zGtw+YUvQ@mail.gmail.com>
Subject: Re: [Bug #32982] Kernel locks up a few minutes after boot
To: Bart Van Assche <bvanassche@acm.org>
Cc: Jens Axboe <jaxboe@fusionio.com>, "Rafael J. Wysocki" <rjw@sisk.pl>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Kernel Testers List <kernel-testers@vger.kernel.org>,
        Maciej Rutecki <maciej.rutecki@gmail.com>,
        Florian Mickler <florian@mickler.org>, Neil Brown <neilb@suse.de>,
        David Dillow <dave@thedillows.org>
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On Tue, Apr 19, 2011 at 9:13 AM, Bart Van Assche <bvanassche@acm.org> wrote:
>
> The same test with an initiator running 2.6.39-rc4 +
> git://git.kernel.dk/linux-2.6-block.git for-linus + the above patch
> yields about 155.000 IOPS on my test setup, or the same performance as
> with 2.6.38.3. I'm running the above patch through an I/O stress test
> now.

Goodie. So not only does that patch get back the 11%, it removes the
crazy QUEUE_FLAG_REENTER flag that was broken to begin with. AND it
removes a number of complicated lines.

Halleluja.

                        Linus
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