From: Dan Malek <dan@embeddededge.com>
To: Dan Malek <dan@embeddededge.com>
Cc: linux-ppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: [PATCH] 8xx: fix usage of pinned 8Mbyte TLB entries
Date: Fri, 6 May 2005 19:10:36 -0400 [thread overview]
Message-ID: <59a68b5b844da7826bb83940af515693@embeddededge.com> (raw)
In-Reply-To: <3ebef94782a6090ac3eb44bd7e78efbf@embeddededge.com>
On May 6, 2005, at 6:49 PM, Dan Malek wrote:
>> 3) Memory for DMA pages must not be in the pinned region. ie. drivers
>> should not allocate memory directly for DMA purposes.
>
> Why not?
Having now read this again, the "Why not?" was for the first
sentence :-)
Drivers should always use the proper dma allocation functions.
Unpredictable and sometimes exciting results can happen if
they don't.
Thanks.
-- Dan
prev parent reply other threads:[~2005-05-06 23:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-05 17:20 [PATCH] 8xx: fix usage of pinned 8Mbyte TLB entries Marcelo Tosatti
2005-05-06 13:04 ` Jason McMullan
2005-05-06 11:39 ` Marcelo Tosatti
2005-05-06 16:43 ` Dan Malek
2005-05-06 13:38 ` Marcelo Tosatti
2005-05-06 22:49 ` Dan Malek
2005-05-06 20:03 ` Marcelo Tosatti
2005-05-07 3:09 ` Dan Malek
2005-05-06 23:05 ` Marcelo Tosatti
2005-05-07 4:39 ` Dan Malek
2005-05-07 5:16 ` Dan Malek
2005-05-07 13:16 ` Marcelo Tosatti
2005-05-07 20:02 ` Dan Malek
2005-05-07 15:47 ` Marcelo Tosatti
2005-05-07 14:05 ` Marcelo Tosatti
2005-05-09 6:09 ` Pantelis Antoniou
2005-05-07 14:59 ` Wolfgang Denk
2005-05-07 5:27 ` Dan Malek
2005-05-07 5:55 ` Dan Malek
2005-05-06 23:10 ` Dan Malek [this message]
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