From: Petr Sebor <petr@scssoft.com>
To: "Petter Sundlöf" <petter.sundlof@findus.dhs.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA)
Date: Sat, 28 Aug 2004 01:45:43 +0200 [thread overview]
Message-ID: <412FC7A7.4030100@scssoft.com> (raw)
In-Reply-To: <412F5D50.7000807@findus.dhs.org>
Petter Sundlöf wrote:
> Using 2.6.8.1. DMA works fine on /dev/hda (PATA, CD burner).
>
> When I try to enable it for my SATA drive (which is performing horribly
> bad -- 80-90% CPU load on an AMD64 3200+ during copy of large files)
Hello,
just a 'me too' e-mail... I have Master2-FAR mobo, VIA/KT800 chipset.
IDE disk runs like a charm but SATA disks consume big amount of cpu
time (which is spent in iowait). The system behaves exactly as with
old IDE disk and DMA disabled... everything is slow when data is
transferred to/from disk.
I have played with various settings, io schedulers, acpi... but haven't
found anything useful so far..
Regards,
Petr
next prev parent reply other threads:[~2004-08-27 23:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-27 16:12 Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA) Petter Sundlöf
2004-08-27 16:32 ` Jeff Garzik
2004-08-27 23:45 ` Petr Sebor [this message]
2004-08-29 13:05 ` Alan Cox
[not found] <7076215DFAA4574099E5CD59FE42226204F6C364@pcssrv42.pcs.pc.ome.toshiba.co.jp>
2004-08-30 6:44 ` Petr Sebor
-- strict thread matches above, loose matches on Subject: below --
2004-08-31 5:58 Tomita, Haruo
2004-08-31 6:06 ` Jeff Garzik
2004-09-01 2:57 Tomita, Haruo
[not found] <4136E7EF00073144@mail-3.tiscali.it>
2004-10-06 0:30 ` Gianluca Cecchi
2004-10-06 0:54 ` Jeff Garzik
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