linux-kernel - Re: [PATCH 10/20] hpfs: replace BKL with a global mutex

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Date:	Tue, 25 Jan 2011 16:15:51 -0800
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 10/20] hpfs: replace BKL with a global mutex

Arnd Bergmann <arnd@...db.de> writes:

> This removes the BKL in hpfs in a rather awful
> way, by replacing it with a mutex that basically
> serializes the entire file system.

I don't think that's a very good idea, there's danger
of holding it over IO and that would be really bad (as in like MINIX[1])

It would be better to do it the i810 way and check for the number of
CPUs at module init time and refuse to run if it's > 1

-Andi

[1] showing my age
-- 
Andi Kleen
Intel Open Source Technology Center

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