Re: swapspace layout improvements advocacy

[Tim Schmielau]

On Fri, 14 Jan 2005, Barry K. Nathan wrote:

> I haven't tried the patch in question (unless it's in any Fedora
> kernels), but I've noticed that the single biggest step to improve
> swapping performance in 2.6 is to use the CFQ scheduler, not the AS
> scheduler. (That's also why Red Hat/Fedora kernels use CFQ as the
> default scheduler.)

Yes, I also use CFQ. Didn't dare to try with the anticipatory scheduler.

Since Andrew was so sceptical, I tested a bit more, and it's not as easily 
reproducible as I wrote. There don't seem to be any problems on a freshly 
booted system. It only happens after using the system for some time. But I 
think that's only natural as the virtal->physical mapping needs to be 
disturbed before seeing any problems.

Tim
-
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/