Re: LUKS/ dm-crypt/ ext4 appears to be single threaded
On Sun, 18 Mar 2012, David Christensen wrote:
> with ext4. I've noticed what appears to be single-threaded behavior
...
> Is this a fundamental limitation of LUKS, dm-crypt, and/or ext4, or
> something I've configured/ misconfigured?
It is a limitation of dm-crypt.
Just get a box with a supported very-high-speed AES hardware accelerator
(e.g. recent amd64/x86-64 processors with AES-NI), and tune your dm-crypt
usage to cyphers that can be hardware accelerated. Even single-threaded
AES-NI dm-crypt would be much faster than multithreaded non-accelerated
dm-crypt, AFAIK.
> Some manufacturers make hard drives with built-in encryption. Are
> these supported by Debian, Linux, or BSD?
Yes, although it often requires proper support from the EFI/BIOS for it to
be usable in the boot device (and also on the image device when using
suspend-to-disk). YMMV.
> Any other comments or suggestions?
You better do your homework if you're going to trust the vendors of
self-encripting devices.
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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