[dm-devel] SMP-aware kcryptd?

[Tomasz Chmielewski]

Currently, the trend with CPUs is to add more cores rather than increase 
the speed of a single core.

This does not scale very well with certain things in the Linux kernel. 
One of them is kcryptd.


A system able to deliver data with a speed of ~200 MB/s from a RAID 
array, will be only able to deliver a fraction of it (i.e. ~40 MB/s in 
my case) when reads are being done from a dm-crypt device.

This is because kcryptd is not SMP-aware: it performs all calculations 
on a single logical CPU only.

Are there any plans to change it?


-- 
Tomasz Chmielewski
http://wpkg.org