Messages in this thread | | | Date | Tue, 13 Nov 2007 20:15:55 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [patch 01/28] cpu alloc: The allocator |
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Hmmm.. I have v2 in preparation here that puts the pda and the per cpu data into the cpu_alloc area. Thus gs: can be used to access all per cpu data.
Any ideas how to abstract out the pda operations? Wasnt local_t supposed to be able to do atomic ops on cpu data? Is there an segment register version of local_t? I want also to have cmpxchg xchg etc that are all atomic without requiring any interrupt disable or preempt disable.
cpu_alloc allows pointer arithmetic on cpu area pointers. The segment prefix can then be used to select the appropriate area.
Guess I need also to add an arch configuration guide to V2 as well so that the other arches can do similar tricks and emphasize that the static default that requires bss is only suitable for small systems. - 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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