From: "Stephen C. Tweedie" <sct@redhat.com>
To: Ingo Molnar <mingo@chiara.csoma.elte.hu>
Cc: Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.rutgers.edu,
"Stephen C. Tweedie" <sct@redhat.com>,
Alan Cox <number6@the-village.bc.nu>
Subject: Re: [patch] zoned-2.3.27-E0
Date: Fri, 12 Nov 1999 17:33:35 +0000 (GMT) [thread overview]
Message-ID: <14380.20335.320349.368261@dukat.scot.redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.10.9911121502120.7240-200000@chiara.csoma.elte.hu>
Hi,
On Fri, 12 Nov 1999 15:02:31 +0100 (CET), Ingo Molnar
<mingo@chiara.csoma.elte.hu> said:
> Stephen noticed that 2.3.27 doesnt boot on <=16MB boxes due to the zoned
> allocator changes. The attached patch should fix this. Unfortunately i
> found no way to prevent introducing the runtime 'nr_zones' variable.
A quick special-case check on zones known to be empty would allow you to
maintain performance even if you have zones which will never have any
pages in them on a given machine.
You need this anyway --- Alan pointed out that it is a significant hit
on benchmarks if, during normal running, one zone fills up and you start
falling back routinely to a lower zone.
--Stephen
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next prev parent reply other threads:[~1999-11-12 17:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-11-12 14:02 Ingo Molnar
1999-11-12 17:33 ` Stephen C. Tweedie [this message]
1999-11-12 18:49 ` Ingo Molnar
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