Messages in this thread | | | Date | Fri, 18 Aug 2006 09:58:13 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [MODSLAB 3/7] A Kmalloc subsystem |
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On Fri, 18 Aug 2006, KAMEZAWA Hiroyuki wrote:
> Just a note: with SPARSEMEM, we need more calculation and access to > mem_section[] table and page structs(mem_map).
Uhh, a regression against DISCONTIG. Could you address that issue?
> > vmalloc_to_addr is certainly slower due to the page table walking. But the > > user already is aware of the fact that vmalloc memory is not as fast as > > direct mapped.
> Considering some code walking through a list of objects scattered over all memory, > Is virtually-mapped area really slow ?
On most arches it is somewhat slower. IA64 is special in the sense that it has virtually mapped kernel memory. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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