Re: [PATCH v2] futex: lower the lock contention on the HB lock during wake up

From: Kevin Hilman
Date: Fri Jun 19 2015 - 15:33:13 EST

Thomas Gleixner <tglx@xxxxxxxxxxxxx> writes:

> On Fri, 19 Jun 2015, Kevin Hilman wrote:
>> On Wed, Jun 17, 2015 at 1:33 AM, Sebastian Andrzej Siewior
>> A handful of boot test failures on ARM/OMAP were found by
>> in next-20150619[1] and were bisected down to this patch, which hit
>> next-20150619 in the form of commit 881bd58d6e9e (futex: Lower the
>> lock contention on the HB lock during wake up). I confirmed that
>> reverting that patch on top of next-20150619 gets things booting again
>> for the affected platforms.
>> I haven't debugged this any further, but full boot logs are available
>> for the boot failures[2][3] and the linux-omap list and maintainer are
>> Cc'd here to help investigate further if needed.
> Found it. Dunno, how I missed that one. Fix below.

Yup, that fix on top of next-20150619 gets the two OMAP platforms
booting again.

Tested-by: Kevin Hilman <khilman@xxxxxxxxxx>

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