linux-kernel - Re: [BUG] commit 3c517a61, slab: better fallback allocation behavior

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Message-Id: <20061210124907.60c4a0aa.pj@sgi.com>
Date:	Sun, 10 Dec 2006 12:49:07 -0800
From:	Paul Jackson <pj@....com>
To:	Jay Cliburn <jacliburn@...lsouth.net>
Cc:	linux-kernel@...r.kernel.org, clameter@....com
Subject: Re: [BUG] commit 3c517a61, slab: better fallback allocation
 behavior

Good report - thanks.

Christoph - fallback_alloc() can be called with interrupts off.

I fixed the cpuset_zone_allowed() call from fallback_alloc() to avoid
sleeping.  Notice the __GFP_HARDWALL added in Linus's version, or the
new function cpuset_zone_allowed_hardwall() in Andrew's version, all
done in the last week.

But apparently kmem_getpages() can also sleep, as it calls __alloc_pages().

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