All,
The following patch will cause a kernel message to be logged when a
process blocks on /dev/random or some other randomness API. It may
help some users befuddled by pkgsrc builds blocking on /dev/random,
and I'm finding it useful when testing changes aimed at fixing PR
55659.
OK to commit?
Index: src/sys/kern/kern_entropy.c
===================================================================
RCS file: /bracket/repo/src/sys/kern/kern_entropy.c,v
retrieving revision 1.23
diff -u -r1.23 kern_entropy.c
--- src/sys/kern/kern_entropy.c 14 Aug 2020 00:53:16 -0000 1.23
+++ src/sys/kern/kern_entropy.c 20 Sep 2020 13:53:46 -0000
@@ -1297,6 +1297,9 @@
/* Wait for some entropy to come in and try again. */
KASSERT(E->stage >= ENTROPY_WARM);
+ printf("entropy: pid %d (%s) blocking due to lack of entropy\n",
+ curproc->p_pid, curproc->p_comm);
+
if (ISSET(flags, ENTROPY_SIG)) {
error = cv_wait_sig(&E->cv, &E->lock);
if (error)
--
Andreas Gustafsson, g...@gson.org
