Hi all. Sorry for what is probably a very tiresome topic here, but just trying to find out what the current status is... I thought I knew the answer to this question (dm-crypt multithreaded yet? no) but I had read in several places that dm-crypt had gained multithreaded capabilities. I'm still skeptical though. I certainly don't see it on Fedora 17's 3.3.4-5.fc17.x86_64 kernel. Sadly, I don't have an AES-NI capable CPU, but I do have 4 (real, 8 with HT enabled) cores and dm-crypting on my SSD reduces its performance down from about 260MB/s (native) to 95MB/s. :-( I would like to think I could get more performance out of it if more of the (usually available anyway) CPU could be thrown at it. Is this something being worked on currently? I have taken note of http://people.redhat.com/mpatocka/patches/kernel/dm-crypt-paralelizace/current/ but that work seems to be going back to Feb/2012. And TBH, I'm not entirely clear if that work is aimed at multi-threaded dm-crypt or not. Cheers, b.
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