Re: AIC7xxx panic

[David M. Grimes]

On Sun, Oct 07, 2001 at 10:31:48PM -0400, Jim Crilly wrote:
> I changed AHC_NSEG from 128 to 512 and as expected the panic went away,
> but does this mean the default should be higher in the kernel or is
> there a real bug here? The main reason I wonder is because it ran fine
> on disk 0 but panic'd on disk 1.

Perhaps this is related (from 2.4.10-acX thread later on l-k):

--------
Subject: Re: linux-2.4.10-acX
To: [e-mail] (Mike Fedyk)
From: Alan Cox <[e-mail]>

> > -   Elevator flow control
>
> Where can I find more information on this?

Read the ll_rw_blk diff. Basically it tries to avoid too many locked
buffers clogging up memory and killing the box. I'm not totally sure its
the right approach.
--------

Were there recent changes in ll_rw_blk which are being addressed by
"Elevator flow control"?  As suggested earlier in this thread, the cause
might be a few layers up, and this seemed relevant.

Can anyone confirm or shed any additional light on this?

  Dave