Author: avg
Date: Mon Jan 9 12:06:09 2012
New Revision: 229854
URL: http://svn.freebsd.org/changeset/base/229854
Log:
enable stop_scheduler_on_panic by default
My plan is to make this behavior unconditional before 10.0 release.
X-MFC after: r228424 (if ever)
Modified:
head/UPDATING
head/sys/kern/kern_shutdown.c
Modified: head/UPDATING
==============================================================================
--- head/UPDATING Mon Jan 9 12:06:02 2012 (r229853)
+++ head/UPDATING Mon Jan 9 12:06:09 2012 (r229854)
@@ -22,6 +22,13 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10
machines to maximize performance. (To disable malloc debugging, run
ln -s aj /etc/malloc.conf.)
+20120109:
+ panic(9) now stops other CPUs in the SMP systems, disables interrupts
+ on the current CPU and prevents other threads from running.
+ This behavior can be reverted using the kern.stop_scheduler_on_panic
+ tunable/sysctl.
+ The new behavior can be incompatible with kern.sync_on_panic.
+
20111215:
The carp(4) facility has been changed significantly. Configuration
of the CARP protocol via ifconfig(8) has changed, as well as format
Modified: head/sys/kern/kern_shutdown.c
==============================================================================
--- head/sys/kern/kern_shutdown.c Mon Jan 9 12:06:02 2012
(r229853)
+++ head/sys/kern/kern_shutdown.c Mon Jan 9 12:06:09 2012
(r229854)
@@ -123,7 +123,7 @@ SYSCTL_INT(_kern, OID_AUTO, sync_on_pani
&sync_on_panic, 0, "Do a sync before rebooting from a panic");
TUNABLE_INT("kern.sync_on_panic", &sync_on_panic);
-static int stop_scheduler_on_panic = 0;
+static int stop_scheduler_on_panic = 1;
SYSCTL_INT(_kern, OID_AUTO, stop_scheduler_on_panic, CTLFLAG_RW | CTLFLAG_TUN,
&stop_scheduler_on_panic, 0, "stop scheduler upon entering panic");
TUNABLE_INT("kern.stop_scheduler_on_panic", &stop_scheduler_on_panic);
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