From: Jeff Garzik <jgarzik@pobox.com>
To: Gianluca Cecchi <gianluca.cecchi@tiscali.it>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA)
Date: Tue, 05 Oct 2004 20:54:14 -0400 [thread overview]
Message-ID: <41634236.1020602@pobox.com> (raw)
In-Reply-To: <4136E4660006E2F7@mail-7.tiscali.it>
Gianluca Cecchi wrote:
> Eventually I can provide config. Btw, I'm using udev and kernel preemption.
I strongly recommend disabling kernel preemption. It is a hack that
hides bugs.
> ata1: dev 0 ATA, max UDMA/133, 240121728 sectors:
> ata1: dev 0 configured for UDMA/100
> and the same for ata2?
The controller maximum is set to UDMA/100.
> But taking in parallel top with refresh 1s in another window, during the
> 80
> seconds elapsed above, I had two freezes in top session: one of 20sec and
> another
> of 15 sec: about the half of the time of the total I/O operation!
> During this time there was one cpu used at about 30%, no other cpu constraints.
> I repeated the operation with similar behaviour. Sometimes also 50 contiguos
> secs
> of freeze, until I/O operation finished.
> The freeze is not about all system itself, but only certian things.
> For example I tried also a vmstat session in another window with 3secs of
> delay
> and it had no problems while top was blocked:
Make sure you have the latest BIOS update for your system, and latest
BIOS update for your card.
Jeff
next prev parent reply other threads:[~2004-10-06 0:54 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4136E7EF00073144@mail-3.tiscali.it>
2004-10-06 0:30 ` Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA) Gianluca Cecchi
2004-10-06 0:54 ` Jeff Garzik [this message]
2004-10-06 1:00 ` Preempt? (was Re: Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA)) Roland Dreier
2004-10-06 1:11 ` Jeff Garzik
2004-10-06 1:28 ` Nick Piggin
2004-10-06 1:32 ` Nick Piggin
2004-10-06 1:40 ` Jeff Garzik
2004-10-06 1:52 ` Robert Love
2004-10-06 1:55 ` Jeff Garzik
2004-10-06 2:02 ` Nick Piggin
2004-10-06 2:07 ` Jeff Garzik
2004-10-06 2:28 ` Nick Piggin
2004-10-06 3:17 ` Andrea Arcangeli
2004-10-06 3:27 ` Jeff Garzik
2004-10-06 3:43 ` Nick Piggin
2004-10-06 3:59 ` Jeff Garzik
2004-10-06 4:05 ` Lee Revell
2004-10-06 4:22 ` Nick Piggin
2004-10-06 15:16 ` Aleksandar Milivojevic
2004-10-06 4:03 ` Andrea Arcangeli
2004-10-06 4:08 ` Jeff Garzik
2004-10-06 4:16 ` Lee Revell
2004-10-06 4:26 ` Nick Piggin
2004-10-06 4:46 ` Andrew Morton
2004-10-06 6:04 ` Jeff Garzik
2004-10-06 6:16 ` Andrew Morton
2004-10-06 13:38 ` Jeff Sipek
2004-10-06 4:12 ` Lee Revell
2004-10-06 3:34 ` Nick Piggin
2004-10-06 2:07 ` Robert Love
2004-10-06 2:30 ` Nick Piggin
2004-09-01 2:57 Cannot enable DMA on SATA drive (SCSI-libsata, VIA SATA) Tomita, Haruo
-- strict thread matches above, loose matches on Subject: below --
2004-08-31 5:58 Tomita, Haruo
2004-08-31 6:06 ` Jeff Garzik
[not found] <7076215DFAA4574099E5CD59FE42226204F6C364@pcssrv42.pcs.pc.ome.toshiba.co.jp>
2004-08-30 6:44 ` Petr Sebor
2004-08-27 16:12 Petter Sundlöf
2004-08-27 16:32 ` Jeff Garzik
2004-08-27 23:45 ` Petr Sebor
2004-08-29 13:05 ` Alan Cox
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