Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

[Arjan van de Ven <arjan@infradead.org>]

On Mon, 3 Dec 2007 11:27:15 +0100
Andi Kleen <andi@firstfloor.org> wrote:

> > Kernel waiting 2 minutes on TASK_UNINTERRUPTIBLE is certainly
> > broken.
> 
> What should it do when the NFS server doesn't answer anymore or 
> when the network to the SAN RAID array located a few hundred KM away
> develops some hickup?  Or just the SCSI driver decides to do lengthy
> error recovery  -- you could argue that is broken if it takes longer 
> than 2 minutes, but in practice these things are hard to test
> and to fix.
> 

the scsi layer will have the IO totally aborted within that time anyway;
the retry timeout for disks is 30 seconds after all.




-- 
If you want to reach me at my work email, use arjan@linux.intel.com
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/