From: Andi Kleen <ak@suse.de>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: ak@suse.de, linux-kernel@vger.kernel.org, pluto@pld-linux.org
Subject: Re: unit-at-a-time...
Date: Mon, 1 Nov 2004 12:10:29 +0100 [thread overview]
Message-ID: <20041101111029.GB24175@wotan.suse.de> (raw)
In-Reply-To: <200411011102.iA1B2jbX012340@harpo.it.uu.se>
> It happened when I added perfctr to a 2.6.5-based SuSE kernel,
> and compiled the whole thing with gcc-3.4.0 (or 3.4.1, don't
> remember). Perfctr normally adds a little stack usage to the
> context-switch path, but gcc-3.4 made it much worse.
> Disabling unit-at-a-time solved the problem.
Better fix would have been a few strategic "noinline"s.
If you want noinline just say it explicitely.
Also I hope they were not all in the same callchain,
if yes you would have only hidden the problem.
-Andi
next prev parent reply other threads:[~2004-11-01 11:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-01 11:02 unit-at-a-time Mikael Pettersson
2004-11-01 11:10 ` Andi Kleen [this message]
[not found] <200410311541.i9VFf0ah023857@harpo.it.uu.se.suse.lists.linux.kernel>
2004-11-01 1:39 ` unit-at-a-time Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2004-10-31 15:41 unit-at-a-time Mikael Pettersson
2004-10-31 16:18 ` unit-at-a-time Jan Engelhardt
2004-10-31 19:05 ` unit-at-a-time Roland Dreier
2004-10-31 21:33 ` unit-at-a-time Arjan van de Ven
2004-10-31 14:57 unit-at-a-time Paweł Sikora
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