[lkml]   [2011]   [Jul]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFD] Direct support for the x86 RDRAND instruction
On Fri, Jul 29, 2011 at 2:05 PM, Jeff Garzik <> wrote:
> This does not cover the one question I [predictably] have:  why not do this
> in rngd, rather than the kernel?

So that's a silly question. It's a dichotomy that just doesn't exist.
Go ahead and use rdrand in rngd too.

But that is entirely independent of the kernel. Why should any
potential rngd use suddenly mean that the kernel shouldn't try to
improve *its* random number code?

No reason what-so-ever. rngd can do whatever the hell it wants. The
kernel doesn't care, and the kernel isn't impacted. There really is no
reason to do "either or", and they have nothing to do with each other.

The kernel also uses the "mov" instruction too to move data between
registers. Should that mean that user programs shouldn't use that
instruction? Obviously not.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2011-07-30 08:07    [W:0.126 / U:1.808 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site