From: Christoph Hellwig <hch@infradead.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
linux-mm <linux-mm@kvack.org>, Rik van Riel <riel@redhat.com>
Subject: Re: RFC: Noreclaim with "Keep Mlocked Pages off the LRU"
Date: Tue, 28 Aug 2007 13:29:36 +0100 [thread overview]
Message-ID: <20070828122936.GB16906@infradead.org> (raw)
In-Reply-To: <20070827235153.GA14109@wotan.suse.de>
On Tue, Aug 28, 2007 at 01:51:53AM +0200, Nick Piggin wrote:
> > A few years ago I tried to implement a mlocked counter in the page
> > aswell, and my approach was to create a union to reuse the space occupied
> > by the lru list pointers for this. I never really got it stable enough
> > because people tripped over the lru list randomly far too often.
>
> My original mlock patches that Lee is talking about did use your
> method. I _believe_ it is basically bug free and worked nicely.
>
> These days we're a bit more consistent and have fewer races with
> LRU handling, which is perhaps what made it doable.
If this works that'd be wonderful. It also means xfs could switch back
to using the block device mapping for it's buffer cache.
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next prev parent reply other threads:[~2007-08-28 12:29 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-23 4:11 vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-around-the-lru Nick Piggin
2007-08-23 7:15 ` vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-around-the-lru Andrew Morton
2007-08-23 9:07 ` vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-around-the-lru Nick Piggin
2007-08-23 11:48 ` vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-aroun d-the-lru Andrea Arcangeli
2007-08-24 20:43 ` RFC: Noreclaim with "Keep Mlocked Pages off the LRU" Lee Schermerhorn
2007-08-27 1:35 ` Nick Piggin
2007-08-27 14:34 ` Lee Schermerhorn
2007-08-27 15:44 ` Christoph Hellwig
2007-08-27 23:51 ` Nick Piggin
2007-08-28 12:29 ` Christoph Hellwig [this message]
2007-08-28 0:06 ` Nick Piggin
2007-08-28 14:52 ` Lee Schermerhorn
2007-08-28 21:54 ` Christoph Lameter
2007-08-29 14:40 ` Lee Schermerhorn
2007-08-29 17:39 ` Christoph Lameter
2007-08-30 0:09 ` Rik van Riel
2007-08-30 14:49 ` Lee Schermerhorn
2007-08-29 4:38 ` Nick Piggin
2007-08-30 16:34 ` Lee Schermerhorn
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