svn commit: r273958 - head/sys/dev/random

[Ian Lepore]

On Sun, 2014-11-02 at 11:05 -0800, Adrian Chadd wrote:
> [snip all the conversation]
> 
> Ok. There's still a problem that I can trigger by trying to Ctrl-C a
> process that's blocked reading for randomness. I'll try to chase up
> more details about and file a PR about it.
> 
> The unfortunate part is that the kernel side stack trace of the
> offending / hung process isn't currently helpful. :(
> 
> 
> 
> 
> -adrian

Possibly related... when I had the boot time save-entropy stuff stuck in
a read yesterday I tried ^T and it first reported the hung process in a
"block" wait.  Any subsequent ^T showed the process as runnable and the
cpu usage as 100%.  This is on a single-core arm.

-- Ian