Re: Disk Hangs with 2.4.18 and ext3

["Stephen C. Tweedie" <sct redhat com>]

Hi,

On Wed, Jul 31, 2002 at 01:47:17PM -0600, Kevin Fenzi wrote:

> Stephen> When debugging a hang like that, you have the problem that a
> Stephen> hang in one place can cause other parts of the kernel to lock
> Stephen> up too.  If the disk locks up, then anything waiting for a
> Stephen> disk IO to complete will wait forever, for example.
> 
> yeah... :( 
> 
> Stephen> ...there are signs of the raid driver being blocked.
> 
> Is this indicitive of a hardware problem with the RAID controller? or
> something else? We did do quite a bit of heavy disk activity on this
> machine during burnin. 

It's impossible to say at this point.

> Stephen> However, it would be useful to see the whole call trace,
> Stephen> because this particular entry looks as if the
> Stephen> DAC960_ProcessRequest entry is simply the result of a recent
> Stephen> interrupt, and we're not actually in that call path at the
> Stephen> moment (the DAC960 address has simply been left behind on the
> Stephen> stack so is picked up by the trace output.)
> 
> ok. Where would I be able to get that? 
> I do have the complete sysrq output of process traces... 

That would be useful, yes.

Cheers,
 Stephen