From: Dave Hansen <haveblue@us.ibm.com>
To: Paul Jackson <pj@sgi.com>
Cc: Joel Schopp <jschopp@austin.ibm.com>,
linux-mm <linux-mm@kvack.org>,
mel@csn.ul.ie
Subject: Re: [Fwd: [PATCH 2/4] cpusets new __GFP_HARDWALL flag]
Date: Mon, 11 Jul 2005 22:24:55 -0700 [thread overview]
Message-ID: <1121145895.5446.1.camel@localhost> (raw)
In-Reply-To: <20050711195540.681182d0.pj@sgi.com>
On Mon, 2005-07-11 at 19:55 -0700, Paul Jackson wrote:
> One question. I've not actually read the memory fragmentation
> avoidance patch, so this might be a stupid question. That
> notwithstanding, do you really need two flags, one KERN and one USER?
> Or would one flag be sufficient - to mark USER pages. Unmarked pages
> would be KERN, presumably. One really only needs 2 bits if one has
> 3 or 4 states to track -- if that's the case, it's not clear to me
> what those 3 or 4 states are (maybe if I actually read the patch it
> would be clear ;).
There are four types, but it only consumes two GFP bits. It's correctly
packed.
-- Dave
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next prev parent reply other threads:[~2005-07-12 5:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1121101013.15095.19.camel@localhost>
2005-07-11 17:36 ` Joel Schopp
2005-07-11 17:49 ` Dave Hansen
2005-07-12 2:55 ` Paul Jackson
2005-07-12 5:24 ` Dave Hansen [this message]
2005-07-12 6:11 ` Paul Jackson
2005-07-12 13:05 ` Mel Gorman
2005-07-12 20:29 ` Paul Jackson
2005-07-13 11:15 ` Mel Gorman
2005-07-14 11:06 ` Paul Jackson
2005-07-18 12:32 ` Mel Gorman
2005-07-18 20:08 ` Joel Schopp
2005-07-27 8:29 ` Paul Jackson
2005-07-27 11:10 ` Mel Gorman
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