Messages in this thread | | | Date | Wed, 4 Mar 2015 16:21:40 -0500 | From | Konrad Rzeszutek Wilk <> | Subject | Re: [PATCH 04/10] xen/blkfront: separate ring information to an new struct |
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> > David assertion that better performance and scalbility can be gained > > with grant table locking and TLB flush avoidance is interesting - as > > 1). The grant locking is going in Xen 4.6 but not earlier - so when running > > on older hypervisors this gives an performance benefit. > > > > 2). I have not seen any prototype TLB flush avoidance code so not know > > when that would be available. > > > > Perhaps a better choice is to do the removal of the persistence support > > when the changes in Xen hypervisor are known? > > > > With patch: [PATCH v5 0/2] gnttab: Improve scaleability, I can get > nearly the same performance as without persistence support. > > But I'm not sure about the benchmark described here: > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/block/xen-blkfront.c?id=0a8704a51f386cab7394e38ff1d66eef924d8ab8
Meaning you weren't able to do the same test?
> > -- > Regards, > -Bob
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