Re: AIC7xxx panic

[Jim Crilly]

Both disks on the controller are Seagate Cheetahs, the one being worked
during the panic is a ST39204LW, the other disk is a ST318451LW.

I did have TCQ enabled and I left it at the default of 255, I'll try a
lower value tomorrow, since it's so late.

Jim

On Sun, 2001-10-07 at 06:48, Rob Turk wrote:
> "Jim Crilly" <[e-mail]> wrote in message
> news:cistron.1002451051.3718.20.camel@warblade...
> > I got a reproducible panic while running dbench simulating 25+ clients,
> > the new aic7xxx driver panics with "Too few segs for dma mapping.
> > "Increase AHC_NSEG". The partition in question is FAT32 and on a
> > different disk than /, I'm not using HIGHMEM. I am using XFS and the
> > preempt patches, but I don't think they're related to the panic.
> >
> > The odd thing, is if I run dbench in the same manner on my / partition,
> > which is on a different disk on the same controller, it goes fine. It
> > seems, to my untrained eye anyway, to be a bad interaction between the
> > vfat driver and the aic7xxx driver.
> >
> > I'm using the old aic7xxx driver right now and it's fine, has anyone
> > else seen anything like this?
> >
> > Jim
> 
> Since this seems to fail on just one disk, it might have to do with one of the
> disk characteristics, like command queue depth. Did you enable Tagged Command
> Queueing, and if so, can you try playing around with the maximum depth?
> 
> Rob
> 
> 
> 
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [e-mail]
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
-- 
Help protect your rights on-line.
Join the Electronic Frontiers Foundation today: http://www.eff.org/join
-----------------------------------------------------------------------
Security: Antonyms: See Microsoft
-----------------------------------------------------------------------
"We are coming after you. God may have mercy on you, but we won't,"
declared Sen. John McCain, R-Arizona.