From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: brking@us.ibm.com, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [patch 08/15] libata: Add ability to prevent PRD from being allocated
Date: Thu, 09 Feb 2006 04:22:10 -0500 [thread overview]
Message-ID: <43EB09C2.6080000@pobox.com> (raw)
In-Reply-To: <43E9D236.2080207@gmail.com>
Tejun Heo wrote:
> Hello, Brian.
>
> brking@us.ibm.com wrote:
>
>>For some HBAs, particularly SAS HBAs, there is no reason to
>>allocate a PRD buffer, since it is not used. Add a flag
>>to prevent its allocation.
>>
>
>
> I think it's better done with ata_sas_port_start/stop rather than with
> ATA_FLAG_NO_PRD. All sata low level drivers which don't use PRD table
> implement their own port_start/stop (ahci.c, sata_sil24.c for example).
Good point.
Jeff
next prev parent reply other threads:[~2006-02-09 9:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-06 15:42 [patch 08/15] libata: Add ability to prevent PRD from being allocated brking
2006-02-08 11:12 ` Tejun Heo
2006-02-08 14:28 ` Brian King
2006-02-09 9:22 ` Jeff Garzik [this message]
2006-02-09 7:20 ` Jeff Garzik
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