--Jauder
On Sun, 28 Apr 1996, Jeff Haumont wrote:
> After reading the message about how to enable striped swapping a while
> ago, I tried it and it made an absolutely tremendous difference for me.
> (It doubled the performance of the stupid little benchmark I was using)
> Because of this I suggest:
>
> diff linux/mm/swapfile.c linux/mm/swapfile.c.old
> 427c427
> < p->prio = least_priority;
> ---
> > p->prio = --least_priority;
> 507c507
> < printk("Adding Swap: %dk swap-space (Priority %d)\n",
> j<<(PAGE_SHIFT-10), p->prio);
> ---
> > printk("Adding Swap: %dk swap-space\n",j<<(PAGE_SHIFT-10));
>
>
> The first change will give all swap partitions the same priority if they
> are not set explicitly or set incorrectly, basically enabling striping
> by default. The only time that I can think of that this would not give
> a performance increase would be when more than one swap partition exists
> on a drive. Most people do not set it up this way. (kind of silly to
> do this, just wastes partition table space)
>
> The second change is pretty obvious. Its nice to see the priority when
> you are trying to set this up and want to make sure the kernel is
> getting the message. It also might help more people become aware of
> this feature.
>
> Thanks,
> Jeff Haumont
>
> -----------------------------------------------------
> Jeff Haumont - jhaumont@cse.unl.edu
> Mail also forwarded to operator@vorlon.unl.edu
> finger jhaumont@cse.unl.edu for PGP public key
>
>
>
.sig under construction