From: Vojtech Pavlik <vojtech@suse.cz>
To: Henryk Paluch <paluch@KMLinux.fjfi.cvut.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RESOLVED]: kernel hangs on CD-R HP8100i if compiled w/ VIA IDE
Date: Fri, 9 Feb 2001 22:44:00 +0100 [thread overview]
Message-ID: <20010209224400.B3621@suse.cz> (raw)
In-Reply-To: <Pine.LNX.4.10.10101211333300.17469-100000@KMLinux.fjfi.cvut.cz> <Pine.LNX.4.10.10102092200350.11205-100000@KMLinux.fjfi.cvut.cz>
In-Reply-To: <Pine.LNX.4.10.10102092200350.11205-100000@KMLinux.fjfi.cvut.cz>; from paluch@KMLinux.fjfi.cvut.cz on Fri, Feb 09, 2001 at 10:18:05PM +0100
On Fri, Feb 09, 2001 at 10:18:05PM +0100, Henryk Paluch wrote:
> Shortly: kernel (2.2.x, 2.4.x) hangs on CD-R HP8100i, VIA KT133 chipset
> (w/ ATA100 support) if kernel is compiled with VIA IDE chipset support.
> Please, see my previous post from 21 Jan 2001 for full description.
>
> After little tweaking via82cxxx.c driver I found, that the cause is
> 'Prefetch Buffer: ' (/proc/ide/via) - if disabled for appropriate IDE
> channel, everything works well. It also explains, why the kernel works
> properly if VIA IDE support is not compiled in - BIOS leaves Prefetch
> disabled (I hacked that driver a bit more to show chipset configuration
> either before and after modification).
>
> So I have a little question: What could be a clean way, to make a kernel
> option to disable prefetch for VIA (use something like 'ide1=noprefetch'?)
> Any idea?
Since version 2.30 of the VIA driver (2.4.2-pre2), the driver leaves
prefetch as is set by BIOS. It seems that ATAPI devices need this set to
off at least on some of the VIA chips.
--
Vojtech Pavlik
SuSE Labs
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prev parent reply other threads:[~2001-02-09 21:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-21 12:34 kernel hangs on CD-R HP8100i if compiled w/ VIA IDE support Henryk Paluch
2001-02-09 21:18 ` [RESOLVED]: kernel hangs on CD-R HP8100i if compiled w/ VIA IDE Henryk Paluch
2001-02-09 21:44 ` Vojtech Pavlik [this message]
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