Re: 2.4.20-rc1 - hang with processes stuck in D

[Andrew Morton]

Jeff Dike wrote:
> 
> 2.4.20-rc1 reliably gets processes stuck in D, eventually wedging the whole
> system.  This is by diffing two kernel pools, one of which has 9 138764288
> byte core files.
> 
> The diff itself is stuck in __wait_on_buffer:
> 
>         Trace; c0131608 <__wait_on_buffer+68/90>

Kernel is waiting for IO completion on a read.  I would be
suspecting your IO system, or interrupt system.

Reverting your ide/scsi/whatever drivers to the last-known-to-work
version would be interesting.