>>>>> "James" == James Bottomley <James.Bottomley@xxxxxxx> writes: >> Correct. It's quite unlikely for pages to be contiguous so this is >> the best we can do. James> Actually, average servers do about 50% contiguous on average James> since we changed the mm layer to allocate in ascending physical James> page order ... this figure is highly sensitive to mm changes James> though, and can vary from release to release. Interesting. When did this happen? Last time I gathered data on segment merge efficiency (1 year+ ago) I found that adjacent pages were quite rare for a normal fs type workload. Certainly not in the 50% ballpark. I'll take another look when I have a moment... -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
