From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: galibert@pobox.com (Olivier Galibert)
Cc: linux-kernel@vger.kernel.org (Hack inc .)
Subject: Re: Allocating non-contigious memory
Date: Wed, 27 Jun 2001 19:52:47 +0100 (BST) [thread overview]
Message-ID: <E15FKQh-0005ef-00@the-village.bc.nu> (raw)
In-Reply-To: <20010627144239.A2265@zalem.puupuu.org> from "Olivier Galibert" at Jun 27, 2001 02:42:39 PM
> What is the Right Way[tm] as of 2.4.6 to allocate 16Mb as 4K pages and
> get the pci bus address for each page? Bonus points is they're
> virtually contiguous, but that's not necessary. IIRC, the old
> vmalloc-then-walk-the-pagetables trick is considered out-of-bounds
> nowadays.
If you want it virtually contiguous then copy the code from bttv that
out-of-bounds or otherwise is now found in about 8 drivers in the kernel.
If you don't need that then you can map user space and use kiovecs - which
is nicer for many things
next prev parent reply other threads:[~2001-06-27 18:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-27 18:42 Olivier Galibert
2001-06-27 18:52 ` Alan Cox [this message]
2001-06-27 21:31 ` Riley Williams
2001-06-27 22:01 ` Alan Cox
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