linux-kernel - Re: [PATCH 02/22] Do not sanity check order in the fast path

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Date:	Fri, 24 Apr 2009 07:25:00 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Linux Memory Management List <linux-mm@...ck.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lin Ming <ming.m.lin@...el.com>,
	Zhang Yanmin <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 02/22] Do not sanity check order in the fast path

On Fri, 2009-04-24 at 10:21 +0100, Mel Gorman wrote:
> > dave@...nel:~/work/mhp-build$ ../linux-2.6.git/scripts/bloat-o-meter
> > i386-numaq-sparse.{1,2}/vmlinux 
> > add/remove: 0/0 grow/shrink: 9/16 up/down: 81/-99 (-18)
> > function                                     old     new   delta
> > st_int_ioctl                                2600    2624     +24
> > tcp_sendmsg                                 2153    2169     +16
> > diskstats_show                               739     753     +14
> > iov_shorten                                   49      58      +9
> > unmap_vmas                                  1653    1661      +8
> > sg_build_indirect                            449     455      +6
> > ahc_linux_biosparam                          251     253      +2
> > nlmclnt_call                                 557     558      +1
> > do_mount                                    1533    1534      +1
> 
> It doesn't make sense at all that text increased in size. Did you make clean
> between each .config change and patch application? Are you using distcc
> or anything else that might cause confusion? I found I had to eliminate
> distscc and clean after each patch application because sometimes
> net/ipv4/udp.c would sometimes generate different assembly when
> accessing struct zone. Not really sure what was going on there.

There's a ccache in there but no distcc.

I'll redo with clean builds.

-- Dave

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