Messages in this thread | | | Date | Thu, 23 Nov 2006 16:04:26 -0500 | From | Jeff Garzik <> | Subject | Re: Entropy Pool Contents |
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Gunter Ohrner wrote: > Hi! > > (PEBKAC warning. I'm probably doing something dump. I just don't know > what...) > > I seem to have an entropy pool on a headless machine which is not nearly > empty (a common problem in this case, I know), but completely empty and > stuck in this state... > > Hornburg:~# cat /proc/sys/kernel/random/entropy_avail > 0 > Hornburg:~# fuser /dev/urandom > Hornburg:~# lsof | grep random > Hornburg:~# cat /proc/sys/kernel/random/entropy_avail > 0 > Hornburg:~# dd if=/dev/hdf of=/dev/urandom bs=512 count=1 > 1+0 records in > 1+0 records out > 512 bytes transferred in 0.016268 seconds (31473 bytes/sec) > Hornburg:~# dd if=/dev/hdf of=/dev/random bs=512 count=1 > 1+0 records in > 1+0 records out > 512 bytes transferred in 0.031943 seconds (16029 bytes/sec) > Hornburg:~# cat /proc/sys/kernel/random/entropy_avail > 0 > Hornburg:~# fuser /dev/urandom > Hornburg:~# fuser /dev/random > Hornburg:~# lsof | grep random > Hornburg:~# cat /proc/sys/kernel/random/poolsize > 4096 > Hornburg:~# > > Also causing disk activities doesn't help at all. (Two disks on a Promise > PDC20268 controller.) > > The system runs a rather ancient Debian Sarge 2.4 kernel: > Linux Hornburg 2.4.27-3-386 #1 Thu Sep 14 08:44:58 UTC 2006 i486 GNU/Linux > > However as the machine itself is also ancient, the 2.4 seems like a good > match. And also 2.4 ought to have a refilling entropy pool, doesn't it? > > Maybe someone can shed some light on what's happening here...
Grab an entropy generator like egd or audio-entropyd, etc.
Jeff
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