Re: kernel performance update - 2.6.14

[jmerkey]

Nick Piggin wrote:

> Jeff V. Merkey wrote:
>
> > Verified. These numbers reflect my measurements as well. I have not 
> > moved off 2.6.9 to newer kernels on shipping products due to these 
> > issues. There are also serious stability issues as well, though 
> > 2.6.14 seems a little better than than previous kernels. Jeff
>
> These issues aren't going to fix themselves. Did you investigate
> any of the performance or (more importantly) stability problems?

Yes I did. The list wasn't too long. I had problems with RCU messages 
and irq warn messages at very high loads and init respawning itself 
subjected to loads > 369 MB/S to the disk channels on 2.6.13. 
Performance was down on disk I/O 2.6.9. I did not investigate the BIO 
fixes but something changed there. Theres also some memory problems with 
corruption somewhere in the 2.6.14.

Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/