linux-kernel - Re: [PATCH] Add trace event for munmap

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Message-ID: <20100708173515.GA11652@infradead.org>
Date:	Thu, 8 Jul 2010 13:35:15 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Eric B Munson <ebmunson@...ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Eric B Munson <emunson@...bm.net>, akpm@...ux-foundation.org,
	mingo@...hat.com, hugh.dickins@...cali.co.uk, riel@...hat.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, anton@...ba.org
Subject: Re: [PATCH] Add trace event for munmap

On Thu, Jul 08, 2010 at 03:44:07PM +0100, Eric B Munson wrote:
> On Thu, 08 Jul 2010, Peter Zijlstra wrote:
> 
> > On Thu, 2010-07-08 at 15:05 +0100, Eric B Munson wrote:
> > > This patch adds a trace event for munmap which will record the starting
> > > address of the unmapped area and the length of the umapped area.  This
> > > event will be used for modeling memory usage.
> > 
> > Does it make sense to couple this with a mmap()/mremap()/brk()
> > tracepoint?
> > 
> 
> We were using the mmap information collected by perf, but I think
> those might also be useful so I will send a followup patch to add
> them.

What kind of infrastructure is perf using for recording
mmap()/mremap()/brk() information?
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