linux-kernel - Re: [PATCH] Revert 9fc2105aeaaf56b0cf75296a84702d0f9e64437b to fix pyaudio (and probably more)

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Message-ID: <20150108165705.GW12302@n2100.arm.linux.org.uk>
Date:	Thu, 8 Jan 2015 16:57:05 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Vince Weaver <vince@...ter.net>,
	"nicolas.pitre@...aro.org" <nicolas.pitre@...aro.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	Marc Zyngier <Marc.Zyngier@....com>,
	kernel list <linux-kernel@...r.kernel.org>,
	"vincent.weaver@...ne.edu" <vincent.weaver@...ne.edu>
Subject: Re: [PATCH] Revert 9fc2105aeaaf56b0cf75296a84702d0f9e64437b to fix
 pyaudio (and probably more)

On Thu, Jan 08, 2015 at 04:41:12PM +0000, Catalin Marinas wrote:
> On Thu, Jan 08, 2015 at 04:34:50PM +0000, Russell King - ARM Linux wrote:
> > On Thu, Jan 08, 2015 at 04:19:08PM +0000, Catalin Marinas wrote:
> > > I really think we should stop this thread. User ABI breakage fixed now.
> > 
> > No.  Vince's email shows a more serious problem.
> > 
> > The ABI breakage issue was reported before the patches were apparently
> > merged, but that information seems to have been lost.  We need to
> > understand how that happened so similar instances don't happen in the
> > future.
> 
> FYI, searching for "Vince Weaver" and "bogomips" found this:
> 
> https://lkml.org/lkml/2013/7/11/454

Gah.

It looks like the report was made by hanging it into a totally different
thread to the patches which caused the problem, and which went nowhere
near the ARM kernel mailing lists.

At least that explains why people like me who really need to know this
stuff were not aware of the issue.

One thing I still can't get my head around though is... Vince reported
the breakage on 11 July 2013, but the patch is dated 30 August and I
merged it 2 September.  So, how did Vince know about it to report the
ABI breakage?  Had it been sitting somewhere else?

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