From: art <art@openbsd.org>
Date: Wed, 19 Apr 2000 10:13:22 +0000 (+0000)
Subject: When logging genio, check if we need to yield in the same way as in uiomove.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=36e56753c4f04cba01267e6672fe1e8ef7ff854c;p=openbsd

When logging genio, check if we need to yield in the same way as in uiomove.
---

diff --git a/sys/kern/kern_ktrace.c b/sys/kern/kern_ktrace.c
index f328f16eb9b..f9c4ea277ab 100644
--- a/sys/kern/kern_ktrace.c
+++ b/sys/kern/kern_ktrace.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_ktrace.c,v 1.15 2000/04/19 08:35:37 art Exp $	*/
+/*	$OpenBSD: kern_ktrace.c,v 1.16 2000/04/19 10:13:22 art Exp $	*/
 /*	$NetBSD: kern_ktrace.c,v 1.23 1996/02/09 18:59:36 christos Exp $	*/
 
 /*
@@ -194,6 +194,12 @@ ktrgenio(vp, fd, rw, iov, len, error)
 
 	buflen -= sizeof(struct ktr_genio);
 	while (resid > 0) {
+		/*
+		 * Don't allow this process to hog the cpu when doing
+		 * huge I/O.
+		 */
+		if (p->p_schedflags & PSCHED_SHOULDYIELD)
+			preempt(NULL);
 		cnt = min(iov->iov_len, buflen);
 		if (copyin(iov->iov_base, cp, cnt))
 			goto done;