From: Christoph Lameter <clameter@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: SLUB: Use ilog2 instead of series of constant comparisons.
Date: Wed, 6 Jun 2007 11:36:07 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0706061053290.11553@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070606100817.7af24b74.akpm@linux-foundation.org>
On Wed, 6 Jun 2007, Andrew Morton wrote:
> This caused test.kernel.org's power4 build to blow up:
>
> http://test.kernel.org/abat/93315/debug/test.log.0
>
> fs/built-in.o(.text+0x148420): In function `.CalcNTLMv2_partial_mac_key':
> : undefined reference to `.____ilog2_NaN'
Hmmm... Weird message that does not allow too much analysis.
The __ilog2_NaN comes about if 0 or a negative number is passed to ilog.
There is no way for that to happen since we check for KMALLOC_MIN_SIZE
and KMALLOC_MAX_SIZE in kmalloc_index() and an unsigned value is used.
There is also nothing special in CalcNTLMv2_partial_mac_key(). Two
kmallocs of 33 bytes and 132 bytes each.
Buggy compiler (too much stress on constant folding)? Or hardware? Can we
rerun the test?
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next prev parent reply other threads:[~2007-06-06 18:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-21 19:51 Christoph Lameter
2007-05-22 8:45 ` Pekka Enberg
2007-06-06 17:08 ` Andrew Morton
2007-06-06 18:36 ` Christoph Lameter [this message]
2007-06-06 20:11 ` Andrew Morton
2007-06-06 20:28 ` Christoph Lameter
2007-06-06 20:34 ` Andrew Morton
2007-06-06 20:41 ` Martin Bligh
2007-06-06 20:52 ` Christoph Lameter
2007-06-06 23:19 ` Andrew Morton
2007-06-06 23:50 ` Christoph Lameter
2007-06-07 0:01 ` Nish Aravamudan
2007-06-07 3:49 ` Christoph Lameter
2007-06-06 23:31 ` Nish Aravamudan
2007-06-07 7:40 ` Andy Whitcroft
2007-06-06 20:43 ` Christoph Lameter
2007-06-06 20:29 ` Nish Aravamudan
2007-06-07 7:48 ` Andy Whitcroft
2007-06-07 7:58 ` Andy Whitcroft
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