Dave Hansen wrote:
> Doug Ledford wrote:
> 
>> I  try to keep the drivers working
>> at a basic level, but until I'm done, benchmarking is pretty much a waste
>> of time I think)
> 
> 
> Benchmarking is integral in what we're doing right now.  We need to make 
> quick decisions about what is good or bad before the freeze. This patch 
> makes my machine unusable for anything that isn't in the pagecache.  A 
> simple "make oldconfig" on a cold tree takes minutes to complete.  My 
> grep test got an order of magnitude worse.  If we have to keep this 
> code, can we just make the default queue HUGE for now? Will that work 
> around it?
> 
> A bunch of the AIO people use QLogic cards, which I'm sure are broken by 
> this as well.  I'm going to back this patch out for all the testing 
> trees I do, and I suggest anyone who cares about I/O on SCSI (excluding 
> aic7xxx) after 2.5.41 do the same.

BTW, here's the cset in issue.

-- 
Dave Hansen
haveblue@us.ibm.com