Speeding up Linux disk encryption (Cloudflare)
The Cloudflare blog has an
article on the company's work to improve the performance of Linux disk
encryption.
"As we can see the default Linux disk encryption implementation has a
significant impact on our cache latency in worst case scenarios, whereas
the patched implementation is indistinguishable from not using encryption
at all. In other words the improved encryption implementation does not have
any impact at all on our cache response speed, so we basically get it for
free!"
Patches are available, but they are apparently not in any form to go
upstream.