Re: [PATCH -v4] random: introduce getrandom(2) system call

[Pavel Machek]

On Wed 2014-07-30 16:40:52, Bernd Petrovitsch wrote:
> On Mit, 2014-07-30 at 07:56 -0600, Bob Beck wrote:
> > Pavel. I have bit 'ol enterprise daemon running with established file
> > descriptors serving thousands of connections
> > which periodically require entropy.  Now I run out of descriptors. I
> > can't establish new connections. but I should
> > now halt all the other ones that require entropy?  I should raise
> > SIGKILL on my process serving these thousands
> > of connetions?  I don't think so.
> 
> If that long-running daemon periodically needs something from a device,
> one would better keep the fd for that open the whole time. Saves some
> CPU cycles and latency too BTW.

Agreed.

On the other hand, keeping a fd open is quite tricky for a
library. But better solution might be to make that easier.

open( , O_IM_A_LIBRARY_GIVE_ME_ONE_OF_THREE_RESERVED_FDS) might be one
solution. Actually, one reserved fd should be enough.

									Pavel
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