Big problems with 7.1 locking up :-(

[Ken Smith]

On Mon, 2009-01-12 at 21:35 +0100, Tomas Randa wrote:
> I have similar problems. The last "good" kernel I have from stable 
> brach, october the 8. Then in next upgrade, I saw big problems with 
> performance.
> I tried ULE, 4BSD etc, but nothing helps, only downgrading system back.
> 
> Now I am trying 7.1-p1 and problems are here again. Mysql is waiting a 
> lot of time with status "waiting for opening table" or "waiting for 
> close tables"
> 
> I have 32bit FreeBSD with PAE, 1x xeon 5420, supermicro motherboard, 
> areca SATA controller. Could not be problem in "da" device for example?
> 
> Thanks Tomas Randa

Could you give r186860 a try?  It is an MFC into stable/7 so if the
machine in question is something you can experiment with just updating
to stable/7 would take care of it.  Otherwise if you could just manually
apply the patch to a 7.1 source tree and do a test build of the kernel
that would also do it.

I'm not experiencing lockups but this patch helped a lot on a machine I
have with a particular disk I/O pattern that resulted in extremely poor
performance with 7.1-RELEASE.  This patch brought it back to its normal
performance level.

Thanks.

-- 
                                                Ken Smith
- From there to here, from here to      |       kensmith at cse.buffalo.edu
  there, funny things are everywhere.   |
                      - Theodore Geisel |

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