linux-kernel - Re: 2.6.19-rc1-mm1

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Date:	Tue, 10 Oct 2006 00:45:26 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org,
	"Chen, Kenneth W" <kenneth.w.chen@...el.com>, linux-mm@...ck.org
Subject: Re: 2.6.19-rc1-mm1

On Tue, 10 Oct 2006 09:20:00 +0200
Arjan van de Ven <arjan@...radead.org> wrote:

> On Tue, 2006-10-10 at 00:09 -0700, Andrew Morton wrote:
> > +htlb-forget-rss-with-pt-sharing.patch

Which I didn't write.  cc's added.

> if it's ok to ignore RSS,

We'd prefer not to.  But what's the alternative?

> can we consider the shared pagetables for
> normal pages patch?

Has been repeatedly considered, but Hugh keeps finding bugs in it.

> It saves quite a bit of memory on even desktop
> workloads as well as avoiding several (soft) pagefaults.
> 
> So.. what does RSS actually mean? Can we ignore it somewhat for
> shared-readonly mappings ? 

We'd prefer to go the other way, and implement RLIMIT_RSS wouldn't we?
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