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[dm-devel] SMP-aware kcryptd?



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


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