Re: unbelievably bad performance: 2.6.27.37 and raid6

It is really slow, recent kernels seem to be unsuitable for use as large
file servers, as the performance is, as you described it, "unbelievably
bad."

Is this raid6 specific? Because FWIW md performance has been fine (not
great, but fine) on my little raid5/10 file servers. As soon as I add
dm-crypt to the mix it all goes to hell, though.

Maybe it's a device-mapper thing? Is everybody affected using LVM?

C.