Messages in this thread | | | From | Paul Menzel <> | Subject | jitterentropy: `jent_mod_init()` takes 17 ms | Date | Mon, 9 Nov 2020 20:31:02 +0100 |
| |
Dear Linux folks,
By mistake I built `XFRM_ESP` into the Linux kernel, resulting in
CONFIG_CRYPTO_SEQIV=y CONFIG_CRYPTO_ECHAINIV=y
and also the Jitterentropy RNG to be built in.
CRYPTO_JITTERENTROPY=y
So, on the Asus F2A85-M PRO starting Linux 4.10-rc3 with `initcall_debug`, the init method is run unconditionally, and it takes 17.5 ms, which is over ten percent of the overall 900 ms the Linux kernel needs until loading the init process.
[ 0.300544] calling jent_mod_init+0x0/0x2c @ 1 [ 0.318438] initcall jent_mod_init+0x0/0x2c returned 0 after 17471 usecs
Looking at the output of systemd-bootchart, it looks like, that this indeed delayed the boot a little, as the other init methods seem to be ordered after it.
I am now building it as a module, but am wondering if the time can be reduced to below ten milliseconds.
Kind regards,
Paul
| |