upstream/opnsense-src
1
0
Fork 0
mirror of https://github.com/opnsense/src.git synced 2026-06-09 00:32:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

randomdev: Remove 100 ms sleep from write routine

Browse source 
This was introduced in 2014 along with the comment (which has since
been deleted):
	/* Introduce an annoying delay to stop swamping */

Modern cryptographic random number generators can ingest arbitrarily
large amounts of non-random (or even maliciously selected) input
without losing their security.

Depending on the number of "boot entropy files" present on the system,
this can speed up the boot process by up to 1 second.

Reviewed by:	cem
Sponsored by:	https://www.patreon.com/cperciva
Differential Revision:	https://reviews.freebsd.org/D32984

(cherry picked from commit 1580afcd6e)
This commit is contained in:
Colin Percival 2021-11-13 08:38:09 -08:00
parent 3afc5f08a9
commit d03a8d181c
1 changed files with 0 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
sys/dev/random/randomdev.c
View file

@ -340,7 +340,6 @@ randomdev_write(struct cdev *dev __unused, struct uio *uio, int flags __unused)
if (error)
break;
randomdev_accumulate(random_buf, c);
tsleep(p_random_alg_context, 0, "randwr", hz/10);
}
if (nbytes != uio->uio_resid && (error == ERESTART || error == EINTR))
/* Partial write, not error. */