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Log a message when a process blocks due to a lack of entropy. 

Discussed on tech-kern.
This commit is contained in:
gson 2020-09-29 07:51:01 +00:00
parent 8d86b96727
commit 30dac4875b
1 changed files with 5 additions and 2 deletions
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7
sys/kern/kern_entropy.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_entropy.c,v 1.23 2020/08/14 00:53:16 riastradh Exp $ */
/* $NetBSD: kern_entropy.c,v 1.24 2020/09/29 07:51:01 gson Exp $ */
/*-
* Copyright (c) 2019 The NetBSD Foundation, Inc.
@ -75,7 +75,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_entropy.c,v 1.23 2020/08/14 00:53:16 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_entropy.c,v 1.24 2020/09/29 07:51:01 gson Exp $");
#include <sys/param.h>
#include <sys/types.h>
@ -1297,6 +1297,9 @@ entropy_extract(void *buf, size_t len, int flags)
/* 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)