Messages in this thread | | | Date | Mon, 8 May 2006 20:38:55 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [PATCH] fs: fcntl_setlease defies lease_init assumptions |
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On Mon, 8 May 2006, Pekka Enberg wrote:
> > I think it sounds like it's worth it, but I'm not going to really push it. > > Sounds good to me. Andrew?
virt_to_page is not cheap on NUMA.
On IA64 virt_to_page is:
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
# define pfn_to_page(pfn) (vmem_map + (pfn))
vmem_map is not a linear map but a virtual mapping that may require several faults to get the information.
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