On Friday December 8, neilb@xxxxxxx wrote: > I have measured very slow write throughput for raid5 as well, though > 2.6.18 does seem to have the same problem. I'll double check and do a > git bisect and see what I can come up with. Correction... it isn't 2.6.18 that fixes the problem. It is compiling without LOCKDEP or PROVE_LOCKING. I remove those and suddenly a 3 drive raid5 is faster than a single drive rather than much slower. Bill: Do you have LOCKDEP or PROVE_LOCKING enabled in your .config ?? NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
