On Mon, Dec 04 2006, Chen, Kenneth W wrote: > > [...] > > > > Another idea would be to kill SLAB_HWCACHE_ALIGN (it's pretty pointless, > > I bet), and always alloc sizeof(*bio) + sizeof(*bvl) in one go when a > > bio is allocated. It doesn't add a lot of overhead even for the case > > where we do > 1 page bios, and it gets rid of the dual allocation for > > the 1 page bio. > > I will try that too. I'm a bit touchy about sharing a cache line for > different bio. But given that there are 200,000 I/O per second we are > currently pushing the kernel, the chances of two cpu working on two > bio that sits in the same cache line are pretty small.
Yep I really think so. Besides, it's not like we are repeatedly writing to these objects in the first place. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
