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From: Jeff Garzik <jgarzik@pobox.com>
To: Jens Axboe <axboe@suse.de>
Cc: Spencer Tuttle <rodeojones@fastmail.fm>, linux-ide@vger.kernel.org
Subject: Re: Marvell MV88SX6041 SATA Driver PIO4 Mode Not DMA
Date: Fri, 11 Nov 2005 09:03:24 -0500	[thread overview]
Message-ID: <4374A4AC.8010007@pobox.com> (raw)
In-Reply-To: <20051111121447.GQ3699@suse.de>

Jens Axboe wrote:
> On Fri, Nov 11 2005, Jeff Garzik wrote:
> 
>>Spencer Tuttle wrote:
>>
>>>I have just compiled the new 2.6.14 kernel from the gentoo-sources tree.
>>>
>>>I can access the drives just fine, but it seems really slow.  Here is
>>>the dmesg output when I load the kernel module
>>
>>That's expected, since the driver in 2.6.14 only does PIO mode.
>>
>>Try 2.6.14-gitN which supports EDMA.
> 
> 
> Did you see these as well:
> 
> blk_queue_max_hw_segments: set to minimum 1
> 
> Could it be forgetting to set ->sg_tablesize as well?

[jgarzik@sata linux-2.6]$ grep MV_MAX_SG_CT drivers/scsi/sata_mv.c
         MV_MAX_SG_CT            = 176,
         MV_SG_TBL_SZ            = (16 * MV_MAX_SG_CT),
         .sg_tablesize           = MV_MAX_SG_CT,

  reply	other threads:[~2005-11-11 14:03 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-11-10 18:48 Marvell MV88SX6041 SATA Driver PIO4 Mode Not DMA Spencer Tuttle
2005-11-11 10:26 ` Jeff Garzik
2005-11-11 12:14   ` Jens Axboe
2005-11-11 14:03     ` Jeff Garzik [this message]
2005-11-11 14:29       ` Jens Axboe
2005-11-11 14:38         ` Jens Axboe
2005-11-11 17:08           ` Spencer Tuttle
2005-11-11 19:15             ` Spencer Tuttle
2005-11-14 21:35           ` Jeff Garzik
2005-11-15  7:57             ` Jens Axboe

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