From: erik quanstrom <quanstro@coraid.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] fossil crash after installation
Date: Mon, 4 Jun 2007 07:45:18 -0400 [thread overview]
Message-ID: <c5f3ba25ccb2cec436ae6c3ef348c429@coraid.com> (raw)
In-Reply-To: <10b109140706040232q4a660daera1e8161433e65c0e@mail.gmail.com>
> Where is the best place to disable DMA ?
> This command can be used in termrc (or cpurc) after kernel is loaded. But
> isn't it late?
>
> Antonin
dma is left as bios left it. c.f. /sys/src/9/pc/sdata.c:/^atadmamode
so disabling dma in bios should do the trick. you can verify this
with
; /cat /dev/sdC0/ctl | grep config
config 427A capabilities 2F00 dma 00550040 dmactl 00000000 rwm 16 rwmctl 0 lba48always off
the number following dmactl will be non-zero if dma is on.
- erik
next prev parent reply other threads:[~2007-06-04 11:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-04 7:26 Antonin Vecera
2007-06-04 7:35 ` Steve Simon
2007-06-04 7:59 ` Charles Forsyth
2007-06-04 8:13 ` W B Hacker
2007-06-04 8:55 ` Charles Forsyth
2007-06-04 8:27 ` Charles Forsyth
2007-06-04 8:58 ` W B Hacker
2007-06-04 8:55 ` Antonin Vecera
2007-06-04 9:32 ` Antonin Vecera
2007-06-04 11:45 ` erik quanstrom [this message]
2007-06-04 15:10 ` Russ Cox
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