From: Ingo Molnar <mingo@elte.hu>
To: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] bootmem: use MAX_DMA_ADDRESS instead of LOW32LIMIT
Date: Fri, 28 Jul 2006 15:13:06 +0200 [thread overview]
Message-ID: <20060728131306.GA32513@elte.hu> (raw)
In-Reply-To: <20060728130852.GB9559@osiris.boeblingen.de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com> wrote:
> From: Heiko Carstens <heiko.carstens@de.ibm.com>
>
> __alloc_bootmem_low() and __alloc_bootmem_low_node() should use
> MAX_DMA_ADDRESS as limit which is per architecture instead of a global
> LOW32LIMIT. Otherwise the bootmem allocator may return addresses to
> memory regions which cannot be used for DMA access.
> -#define LOW32LIMIT 0xffffffff
> if ((ptr = __alloc_bootmem_core(bdata, size,
> - align, goal, LOW32LIMIT)))
> + align, goal, MAX_DMA_ADDRESS)))
but this limits things to 16MB on i686. Are you sure this wont break
anything?
Ingo
next prev parent reply other threads:[~2006-07-28 13:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-28 13:08 [patch] bootmem: use MAX_DMA_ADDRESS instead of LOW32LIMIT Heiko Carstens
2006-07-28 13:13 ` Ingo Molnar [this message]
2006-07-28 14:58 ` Martin Schwidefsky
2006-07-28 19:41 ` Heiko Carstens
2006-07-29 3:55 ` Ingo Molnar
2006-08-07 5:27 ` Randy.Dunlap
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060728131306.GA32513@elte.hu \
--to=mingo@elte.hu \
--cc=akpm@osdl.org \
--cc=heiko.carstens@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=schwidefsky@de.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.