From: Marvin Justice <mjustice@austin.rr.com>
To: Jens Axboe <axboe@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: highmem question
Date: Fri, 7 Dec 2001 20:10:24 -0600 [thread overview]
Message-ID: <01120720102404.00764@bozo> (raw)
In-Reply-To: <Pine.LNX.4.30.0112071404280.29154-100000@mustard.heime.net> <01120719534703.00764@bozo> <20011208015446.GC32569@suse.de>
In-Reply-To: <20011208015446.GC32569@suse.de>
> That's because of highmem page bouncing when doing I/O. There is indeed
> a solution for this -- 2.5 or 2.4 + block-highmem-all patches will
> happily do I/O directly to any page in your system as long as your
> hardware supports it. I'm sure we're beating w2k with that enabled :-)
Will your patch lead to better performance than the CONFIGH_HIGHMEM=n case?
Unfortunately, W2K with any amount of memory beat Linux with no highmem (see
http://www.uwsg.indiana.edu/hypermail/linux/kernel/0110.3/0375.html ) so my
PHB decided to hold off on Linux for now.
Marvin
next prev parent reply other threads:[~2001-12-08 2:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-07 13:06 highmem question Roy Sigurd Karlsbakk
2001-12-08 0:01 ` H. Peter Anvin
2001-12-08 1:30 ` Marvin Justice
2001-12-08 1:28 ` H. Peter Anvin
2001-12-08 1:53 ` Marvin Justice
2001-12-08 1:52 ` H. Peter Anvin
2001-12-08 1:54 ` Jens Axboe
2001-12-08 1:58 ` H. Peter Anvin
2001-12-08 2:02 ` Jens Axboe
2001-12-08 2:10 ` Marvin Justice [this message]
2001-12-08 2:08 ` H. Peter Anvin
2001-12-08 2:10 ` Jens Axboe
2001-12-08 3:43 ` war
2001-12-08 3:46 ` H. Peter Anvin
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