From: Christoph Hellwig <hch@infradead.org>
To: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Cc: Nick Piggin <npiggin@suse.de>, linux-mm <linux-mm@kvack.org>,
Rik van Riel <riel@redhat.com>
Subject: Re: RFC: Noreclaim with "Keep Mlocked Pages off the LRU"
Date: Mon, 27 Aug 2007 16:44:26 +0100 [thread overview]
Message-ID: <20070827154426.GA27868@infradead.org> (raw)
In-Reply-To: <1188225247.5952.41.camel@localhost>
On Mon, Aug 27, 2007 at 10:34:07AM -0400, Lee Schermerhorn wrote:
> Well, keeping the mlock count in the lru pointer more or less defeats
> the purpose of this exercise for me--that is, a unified mechanism for
> tracking "non-reclaimable" pages. I wanted to maintain the ability to
> use the zone lru_lock and isolate_lru_page() to arbitrate access to
> pages for migration, etc. w/o having to temporarily put the pages back
> on the lru during migration.
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.
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next prev parent reply other threads:[~2007-08-27 15:44 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 [this message]
2007-08-27 23:51 ` Nick Piggin
2007-08-28 12:29 ` Christoph Hellwig
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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