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

From: Paul Jackson
Date: Thu Jul 27 2006 - 09:10:28 EST

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@xxxxxxx> 1.925.600.0401
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