From: ebiederm@xmission.com (Eric W. Biederman)
To: David Wragg <dpw@doc.ic.ac.uk>
Cc: "Benjamin C.R. LaHaise" <blah@kvack.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: limit on number of kmapped pages
Date: 24 Jan 2001 07:27:05 -0700 [thread overview]
Message-ID: <m1n1chdo06.fsf@frodo.biederman.org> (raw)
In-Reply-To: <Pine.LNX.3.96.1010123205643.7482A-100000@kanga.kvack.org> <y7r7l3ldzxp.fsf@sytry.doc.ic.ac.uk>
In-Reply-To: David Wragg's message of "24 Jan 2001 10:09:22 +0000"
David Wragg <dpw@doc.ic.ac.uk> writes:
> I'd still like to know what the basis for the current kmap limit
> setting is.
Mostly at one point kmap_atomic was all there was. It was only the
difficulty of implementing copy_from_user with kmap_atomic that convinced
people we needed something more. So actually if we can kmap several
megabyte at once the kmap limit is quite high.
Eric
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next prev parent reply other threads:[~2001-01-24 16:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-23 13:56 limit on number of kmapped pages David Wragg
2001-01-23 18:23 ` Eric W. Biederman
2001-01-24 0:35 ` David Wragg
2001-01-24 2:03 ` Benjamin C.R. LaHaise
2001-01-24 10:09 ` David Wragg
2001-01-24 14:27 ` Eric W. Biederman [this message]
2001-01-25 10:06 ` Random thoughts on sustained write performance Daniel Phillips
2001-01-25 18:16 ` limit on number of kmapped pages Stephen C. Tweedie
2001-01-25 23:53 ` David Wragg
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