linux-kernel - Should cpuset ABBA deadlock fix be in 2.6.18-rc2-mmx?

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Message-Id: <20060727061232.044fc927.pj@sgi.com>
Date:	Thu, 27 Jul 2006 06:12:32 -0700
From:	Paul Jackson <pj@....com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Should cpuset ABBA deadlock fix be in 2.6.18-rc2-mmx?

I'd like to encourage including the patch:

  Cpuset: fix ABBA deadlock with cpu hotplug lock

in 2.6.18-rc2-mmx.  This patch was sent to lkml,
copied to akpm, 14 July.  It was sent again to lkml,
in response to a request for a copy from Linus, on
23 July, copied again to akpm.

Granted, the case for including it is not absolute.

The fix is simple enough and fixes a definite deadlock,
as verified by testing results on the system that was
seeing this deadlock.

However ... only one system, world-wide, has the magic
workload to provoke this deadlock, so far.  And it involves
the cpu hotplug lock, which perhaps Linus would like to
nuke entirely.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.925.600.0401
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