linux-kernel - Re: 2.6.24-rc7: memory leak?

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Message-ID: <20080117122856.GT3940@zip.com.au>
Date:	Thu, 17 Jan 2008 23:28:57 +1100
From:	CaT <cat@....com.au>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24-rc7: memory leak?

On Thu, Jan 17, 2008 at 01:21:51PM +0100, Peter Zijlstra wrote:
> > If that's the case it would seem to be somewhat of a pain to get and
> > kind of out of left field as I'd say most people would expect MemFree to
> > indicate the amount of memory that's no longer freely available
> > (ignoring swapping it out for simplicities sake).
> 
> I'm somewhat confused as to what you're saying. How would anyone expect
> MemFree to be memory that is _not_ freely available?

I think we have conflicting ideas of what 'freely available' means here
which is causing the confusion. :)

> Or are you asking how to compute the amount of freeable memory, that is
> memory that isn't currently free, but could be freed up under pressure?

Yes. I think I am. (heh)

> If that is indeed your question, then yes, thats rather hard as slabinfo
> and the like don't indicate which buckets have shrinkers (but even if

Ah. Foo.

> they would have shrinkers there is no guarantee they'd be able to shrink
> 100%)

Whacky.

:/

-- 
    "To the extent that we overreact, we proffer the terrorists the
    greatest tribute."
    	- High Court Judge Michael Kirby
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