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From: Debian User <h.vanberkum@chello.nl>
To: kernel-janitors@vger.kernel.org
Subject: Re: [Kernel-janitors] serial.c cli() patch
Date: Wed, 25 Feb 2004 23:51:20 +0000	[thread overview]
Message-ID: <403D34F8.7040809@chello.nl> (raw)
In-Reply-To: <403D1CC3.6080906@chello.nl>

Zach Brown wrote:

> Sometimes it makes more sense to think of the locking as protecting data
> instead of paths through code that uses the data.  This can get very
> complicated depending on the access patterns, of course, but it's a good
> way to approach the problem.

So if I lock data I should use a lock for every single data variable 
which is at risk for a race condition. If I use a global one like I did 
here then all data structures are locked at once, which is not very good 
in a SMP system since an other processor could access an other data 
structure which now is also locked by the global lock.
Am I right here?

Richard
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  parent reply	other threads:[~2004-02-25 23:51 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-25 22:08 [Kernel-janitors] serial.c cli() patch Debian User
2004-02-25 23:44 ` Debian User
2004-02-25 23:51 ` Debian User [this message]
2004-02-26 22:59 ` Zach Brown
2004-02-26 23:18 ` Matthew Wilcox
2004-02-27  0:32 ` Zach Brown
2004-02-27 15:17 ` Matthew Wilcox
2004-02-28  4:07 ` Arnaldo Carvalho de Melo

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