Met vriendelijke groet / kind regards,
Mike Looijmans
System Expert
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On 18-09-2020 19:55, Richard Purdie via lists.openembedded.org wrote:
On Fri, 2020-09-18 at 10:45 -0700, Khem Raj wrote:
On 9/17/20 11:00 PM, Richard Purdie wrote:
Where we have images with PAM+systemd, serial login can be
extremely
slow. The load generated by key generation does slow down the rest
of the boot process.
this is a good find. So I wonder if its because we have entropy
starvation. I see that we do enable virtio-rng while launching qemu
so something to look in this area perhaps.
I did check and the virtio rng is alive and well in the image. Its the
CPU usage of the key generation that partly causes the issue.
Another solution is to just have it create smaller keys. The computation
time seems to grow exponential with the bit count, a 2048 size key can
take 10 times longer than a 1024 bit key to generate, and a 4096 may
take 10x that again.
There's been a move to 4096 sizes keys lately, pushing the CPU use even
further. Unless you're controlling a nuclear power plant or so, that's a
bit excessive.
--
Mike Looijmans
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