Skip site navigation (1)Skip section navigation (2)
Date:      Fri, 7 Mar 2003 01:04:49 -0800
From:      David Schultz <das@FreeBSD.ORG>
To:        "Marc G. Fournier" <scrappy@hub.org>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: bug in aac driver ... ?
Message-ID:  <20030307090449.GB61037@HAL9000.homeunix.com>
In-Reply-To: <20030305224856.R38115@hub.org>
References:  <20030305224856.R38115@hub.org>

next in thread | previous in thread | raw e-mail | index | archive | help
Thus spake Marc G. Fournier <scrappy@hub.org>:
>   I have an Intel server (SVW7500, or some designation like that) setup
> with an Adaptec 2120S controller in it:
> 
> aac0: <Adaptec SCSI RAID 2120S> mem 0xf8000000-0xfbffffff irq 2 at device 9.0 on pci1
> aac0: i960RX 100MHz, 48MB cache memory, optional battery present
> aac0: Kernel 4.0-0, Build 5770, S/N 232fb7
> 
>   Originally, when we installed it, we had a problem where, while booting,
> you would suddenly get the 'aac timeout' message scroll up the screen,
> that has/had since been fixed ...
> 
>   Yesterday, after doing some work on one of our servers to increase the #
> of vnodes, I added and built a new kernel with:
> 
> options         VM_KMEM_SIZE="(400*1024*1024)"
> options         VM_KMEM_SIZE_MAX="(400*1024*1024)"
> 
>    Which I have running on venus (its using an AMI RAID card) without any
> hassles ... upon reboot of the Adaptec/Intel server, I once more am
> getting the Timeouts and inability to boot ... a kernel built 10 minutes
> earlier, without those options, but the exact same code, runs fine, so
> something with the VM_KMEM_SIZE increase is causing the problem ...

I don't know why VM_KMEM_SIZE would tickle a RAID controller
problem, but I've seen timeout message similar to the one you
describe with a flaky SCSI controller.  (Try statically compiling
all relevant drivers into the kernel if you're not already.)  The
fix for me was to reduce the tag depth with camcontrol.  Try a
value around 8 or so; there shouldn't be much, if any, of a
performance difference.

	camcontrol tags devicename -N8

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030307090449.GB61037>