Re: aic94xx: failing on high load (another data point)

[Keith Hopkins <vger@hopnet.net>]

On 02/20/2008 11:48 AM, James Bottomley wrote:
> On Tue, 2008-02-19 at 10:22 -0600, James Bottomley wrote:
>> I'll see if I can come up with patches to fix this ... or at least
>> mitigate the problems it causes.
> 
> Darrick's working on the ascb sequencer use after free problem.
> 
> I looked into some of the error handling in libsas, and apparently
> that's a bit of a huge screw up too.  There are a number of places where
> we won't complete a task that is being errored out and thus causes
> timeout errors.  This patch is actually for libsas to fix all of this.
> 
> I've managed to reproduce some of your problem by firing random resets
> across a disk under load, and this recovers the protocol errors for me.
> However, I can't reproduce the TMF timeout which caused the sequencer
> screw up, so you still need to wait for Darrick's fix as well.
> 
> James
> 

Hi James, Darrick,

  Thanks again for looking more into this.  I'll wait for Darrick's patch and try it together with this libsas patch.  Should I leave James' first patch in also?

  I'm still looking for a Dell machine to use, and will upgrade the drives' firmware the first chance I get.

Thanks again,
--Keith