linux-kernel - Re: How to disable DMA for compact-flash disk?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4A85D490.6000701@candelatech.com>
Date:	Fri, 14 Aug 2009 14:18:08 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: How to disable DMA for compact-flash disk?

On 08/14/2009 02:10 PM, Alan Cox wrote:
>> This worked fine, but now I'm having some more issues.  Using libata is 1/2
>> as fast as using IDE mode.  I *think* the problem might be that libsata
>> may not be using 32-bit PIO mode, but I'm not certain of that.  It seems
>> that ide mode uses PIO2 v/s PIO4 for libsata too.
>
> As of 2.6.29 libata doesn't use 32bit PIO (it shouldn't make a difference
> for most chipsets but it does for some). 2.6.30 does for some and you can
> turn it on for others if you want to test by inheriting
> ata_bmdma32_port_ops instead of ata_bmdma_port_ops

Can you give me a clue as to what code needs poking?  I'm working
on the latest 31-rc5 tree, btw.

PS.  Can't get an ide based 2.6.31-rc5 kernel to boot in F11, though it doesn't seem
to be related to ide.  I probably have something wrong in my .config.

Thanks,
ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/