linux-kernel - Re: [PATCH] Add per-cpu indexing to /proc/timer

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Message-ID: <20081126143928.GA16576@tsunami.ccur.com>
Date:	Wed, 26 Nov 2008 09:39:28 -0500
From:	Joe Korty <joe.korty@...r.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add per-cpu indexing to /proc/timer_list

On Wed, Nov 26, 2008 at 07:50:04AM +0300, Alexey Dobriyan wrote:
> On Tue, Nov 25, 2008 at 06:14:45PM -0500, Joe Korty wrote:
> > Per-cpu indexing of /proc/timer_list.
> > 
> > /proc/timer_list, potentially a very large file, is in
> > danger of overflowing its seq_file buffer.  So 'split up'
> > the buffering on cpu ID boundaries.  This should make this
> > file more likely to be useful on largish SMP systems.
> 
> What do you mean?
> 
> You can't overflow seq_file buffer unless kmalloc() will fail large
> allocation. And changing internals doesn't change amount of stuff
> to be shown, which is the only thing which can lead to large buffer
> need.

You're right, I missed the re-malloc part.

Joe
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