From: "H. Peter Anvin" <hpa@zytor.com>
To: mjustice@austin.rr.com
Cc: Jens Axboe <axboe@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: highmem question
Date: Fri, 07 Dec 2001 18:08:18 -0800 [thread overview]
Message-ID: <3C117612.4060904@zytor.com> (raw)
In-Reply-To: <Pine.LNX.4.30.0112071404280.29154-100000@mustard.heime.net> <01120719534703.00764@bozo> <20011208015446.GC32569@suse.de> <01120720102404.00764@bozo>
Marvin Justice wrote:
>>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.
>
Depends if you need the extra memory or not.
-hpa
next prev parent reply other threads:[~2001-12-08 2:09 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
2001-12-08 2:08 ` H. Peter Anvin [this message]
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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