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http://kerneltrap.org/node/8176 I am a mdadm/disk/hard drive fanatic, I was curious: > On i386, we can at most fit 256 scatterlist elements into a page, > and on x86-64 we are stuck with 128. So that puts us somewhere > between 512kb and 1024kb for a single IO. How come 32bit is 256 and 64 is only 128? I am sure it is something very fundamental/simple but I was curious, I would think x86_64 would fit/support more scatterlists in a page. Also, when this patch is implemented for x86_64 and if merged into mainline, what does this mean for performance? I have an mdadm raid5 of 10 raptors and get 434MB/s write and 622MB/s read, would I see an increase in performance with this patch? Justin. - 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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