From: Hugh Dickins <hugh@veritas.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: fix /proc/meminfo DirectMap
Date: Fri, 15 Aug 2008 14:32:15 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.64.0808151426080.309@blonde.site> (raw)
In-Reply-To: <20080815131530.GG19125@one.firstfloor.org>
On Fri, 15 Aug 2008, Andi Kleen wrote:
> On Fri, Aug 15, 2008 at 01:58:32PM +0100, Hugh Dickins wrote:
> > Do we actually want these DirectMap lines in the x86 /proc/meminfo?
> > I can see they're interesting to CPA developers and TLB optimizers,
> > but they don't fit its usual "where has all my memory gone?" usage.
>
> It was intended for the "why is my computer going slower" usage.
Yes, that's what I meant by the TLB optimizers. But it's going to
be a fractional effect, isn't it, when you're trying to get the last
1% out of the machine? And in such a case, you might wonder more
what all the 4k ones are actually being used for (no problem at all
if they've ended up behind vmalloced module text).
Hugh
next prev parent reply other threads:[~2008-08-15 13:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-15 12:58 Hugh Dickins
2008-08-15 13:15 ` Andi Kleen
2008-08-15 13:32 ` Hugh Dickins [this message]
2008-08-15 13:36 ` Andi Kleen
2008-08-15 13:45 ` Ingo Molnar
2008-08-15 13:28 ` Ingo Molnar
2008-08-15 14:30 ` Hugh Dickins
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