From: Andrea Arcangeli <andrea@suse.de>
To: Kanoj Sarcar <kanoj@google.engr.sgi.com>
Cc: nconway.list@ukaea.org.uk, linux-mm@kvack.org
Subject: Re: The 4GB memory thing
Date: 05 Nov 1999 00:41:39 +0100 [thread overview]
Message-ID: <m37ljx25ak.fsf@alpha.random> (raw)
In-Reply-To: kanoj@google.engr.sgi.com's message of "Thu, 4 Nov 1999 10:48:20 -0800 (PST)"
kanoj@google.engr.sgi.com (Kanoj Sarcar) writes:
> I don't see a README.gz under
> http://www.kernel.org/pub/linux/kernel/people/andrea/tools/apply-patches/
lftp> pwd
ftp://ftp.it.kernel.org/pub/linux/kernel/people/andrea/tools/apply-patches
lftp> ls README.gz
-rw-r--r-- 1 ftp daemon 875 Oct 25 00:43 README.gz
lftp>
> In any case, did you a have a small technical README on how rawio works
> on bigmem in 2.2.13aa3? Btw, I haven't seen the rawio 2.2 port, I am
As first you can have a look at the rawio patch.
ftp://ftp.it.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.2/2.2.13aa3/z-bigmem-rawio-2.2.13aa2-1.gz
The above patch includes all the necessary stuff to make rawio working
fine on bigmem pages.
Basically the code uses regular pages as bounce buffers to do the I/O
on bigmem pages.
> assuming its very similar to 2.3 ... where brw_kiovec() refuses to
> accept PageHighMem pages. I didn't see anything in
> z-bigmem-2.2.13aa3-7
No. The z-bigmem-rawio-2.2.13aa2-1.gz in 2.2.13aa3 allows brw_kiovec
to do I/O on bigmem pages.
> that tinkers either with fs/buffer.c.
I take the bigmem stuff separated from rawio. The rawio patch (pointed
out above) included in 2.2.13aa3 is an incremental patch that goes on the top of
bigmem. I take all the patches separated to allow everybody out there to merge
easily my stuff and to see the only related necessary changes on
topic.
--
Andrea
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next prev parent reply other threads:[~1999-11-04 23:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-11-04 18:19 The 4GB memory thing Andrea Arcangeli
1999-11-04 18:48 ` Kanoj Sarcar
1999-11-04 22:50 ` Ingo Molnar
1999-11-04 22:08 ` Kanoj Sarcar
1999-11-05 8:21 ` Ingo Molnar
1999-11-04 23:41 ` Andrea Arcangeli [this message]
-- strict thread matches above, loose matches on Subject: below --
1999-11-03 9:48 Neil Conway
1999-11-03 18:09 ` Kanoj Sarcar
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