Messages in this thread | | | From | Gunter Ohrner <> | Subject | Entropy Pool Contents | Date | Thu, 23 Nov 2006 00:54:03 +0100 |
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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...
Greetings,
Gunter
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