From: Andrew Morton <akpm@osdl.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Hugh Dickins <hugh@veritas.com>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Linux Memory Management <linux-mm@kvack.org>,
Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [patch] mm: mremap correct rmap accounting
Date: Mon, 29 Jan 2007 12:03:25 -0800 [thread overview]
Message-ID: <20070129120325.26707d26.akpm@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0701291123460.3611@woody.linux-foundation.org>
On Mon, 29 Jan 2007 11:27:56 -0800 (PST)
Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
>
> On Mon, 29 Jan 2007, Hugh Dickins wrote:
>
> > On Mon, 29 Jan 2007, Nick Piggin wrote:
> > >
> > > OK, how's this one?
> >
> > Grudging okay - so irritating to have to do this!
>
> I really hate it. Like REALLY REALLY hate it.
>
> This just seems really stupid.
>
> How about making the zero-page on MIPS be PageCompound(), and then have
> all the sub-pages just point to the first page - that's how compound pages
> work anyway.
>
Can we convert those bits of mips to just have a single zero-page, like
everyone else?
Is that trick a correctness thing, or a performance thing? If the latter,
how useful is it, and how common are the chips which use it?
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next prev parent reply other threads:[~2007-01-29 20:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-23 14:19 [patch] mm: mremap correct rmap accounting Nick Piggin
2007-01-23 20:55 ` Hugh Dickins
2007-01-23 23:49 ` Nick Piggin
2007-01-29 3:31 ` Nick Piggin
2007-01-29 6:40 ` Andrew Morton
2007-01-29 6:57 ` Nick Piggin
2007-01-29 19:08 ` Hugh Dickins
2007-01-29 19:27 ` Linus Torvalds
2007-01-29 20:03 ` Andrew Morton [this message]
2007-01-29 20:18 ` Linus Torvalds
2007-01-29 21:27 ` Ralf Baechle
2007-01-29 20:10 ` Hugh Dickins
2007-01-29 20:22 ` Linus Torvalds
2007-01-29 20:38 ` Hugh Dickins
2007-01-29 21:24 ` Hugh Dickins
2007-01-30 1:00 ` Nick Piggin
2007-01-30 14:24 ` Carsten Otte
2007-01-30 16:41 ` Ralf Baechle
2007-01-30 17:35 ` Carsten Otte
2007-01-30 15:47 ` Carsten Otte
2007-01-30 22:04 ` Hugh Dickins
2007-01-31 13:51 ` Carsten Otte
2007-01-31 13:59 ` Carsten Otte
2007-01-31 16:31 ` Hugh Dickins
2007-02-01 16:21 ` Carsten Otte
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