Hello together, i experienced severe performance problems when using a crypt mapping on a software raid 5 with 512k chunk size. Without a crypt mapping the write speed was ~100M/sec, with the crypt mapping it had only ~20M/sec. After is rebuild the raid on the same disks using 64k chunk size, the write performance with the crypt mapping is now ~90M/sec. I am using a self compiled 3.2.6 vanilla kernel on a debian squeeze with an AMD Phenom(tm) II X4 955 processor. For now reducing the chunk size solved the problem for me but 512k chunk size was chosen as the default by mdadm so it would be nice to find the reason for this performance bottleneck. Greets, Dennis _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
