linux-kernel - Re: Linux 2.6.20-rc7

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Message-ID: <84144f020701312248r74007ea6je278adf4f27e2171@mail.gmail.com>
Date:	Thu, 1 Feb 2007 08:48:16 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Linus Torvalds" <torvalds@...ux-foundation.org>
Cc:	"PaweÅ Sikora" <pluto@...k.net>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Christoph Hellwig" <hch@....de>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"Martin Peschke" <mp3@...ibm.com>, "Andrew Morton" <akpm@...l.org>,
	"Adrian Bunk" <bunk@...sta.de>
Subject: Re: Linux 2.6.20-rc7

On 1/31/07, Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> When do_tune_cpucache() is called at bootup, I'm not sure how safe it is
> to do the kzalloc() thing.

The kzalloc thing is safe as we have already successfully boostrapped
all kmalloc caches at that point. The per-CPU caches that are replaced
by do_tune_cpucache() point to boostrap-time array caches there (see
use of struct arraycache_init in setup_cpu_cache).
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