Date: Wed, 3 Feb 1999 18:26:13 +1100 (EST) From: "John Saunders" <john.saunders@nlc.net.au> To: Gregory Bond <gnb@itga.com.au> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Kernel panic with recent RELENG_3 Message-ID: <Pine.LNX.3.95.990203182309.27450C-100000@nhj.nlc.net.au> In-Reply-To: <199902030603.RAA20524@lightning.itga.com.au>
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On Wed, 3 Feb 1999, Gregory Bond wrote:
> > Has anybody else noticed the IDE disk flackyness lately? One one machine
> > I have a ccd mirror, and on another machine a vinum mirror. If I hit
> > these filesystems heavily it's a garantee to lock, no panic, virtual
> > console switching works, ping works, but everything stops.
>
> I discovered what sounds very similar which bit me only when softupdates were
> enabled. I also discovered that if I put the 0xa0ff flags on the drive spec in
> the kernel config (to enable DMA/32 bit/ multi-sector transfers), it works
> fine. My conclusion was some bug in the old-fashioned bit of the IDE driver,
> but no-one accepted my offers of a guaranteed hang to help debug the problem :<
Hmm, very interesting. Since the recent commit to wd.c that is causing the
DMA error 0 messages, I have been disabling DMA mode in my kernels until
it gets sorted out. I might try with DMA enabled and see what happens.
Cheers.
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