Messages in this thread | | | Date | Mon, 29 Apr 1996 10:57:03 -0400 (EDT) | From | Jauder Ho <> | Subject | Re: Small swapfile.c patch |
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you have to consider the case when let's say I buy another disk and I don't feel like repartitioning and assign some space as swap. also can you send me the message on how to enable striped swap? thanks
--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
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