[dm-devel] SMP-aware kcryptd?

[Tomasz Chmielewski]

Milan Broz schrieb:
> Tomasz Chmielewski wrote:
>> 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.

(...)

> Anyway, it is not highest priority currently... but still in slow progress.
> (but I guess high speed SSDs will increase priority for this too,
> currently it is real problem only for RAID arrays:-)

And, laptops/netbooks with (slow) multi-core CPUs.

Encryption is getting popular there as well.


-- 
Tomasz Chmielewski
http://wpkg.org