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enable stop_scheduler_on_panic by default

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My plan is to make this behavior unconditional before 10.0 release.

X-MFC after:	r228424 (if ever)
This commit is contained in:
Andriy Gapon 2012-01-09 12:06:09 +00:00
parent 317ebc3d0d
commit 90d8265326
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=229854
2 changed files with 8 additions and 1 deletions
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7
UPDATING
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@ -22,6 +22,13 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
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

2
sys/kern/kern_shutdown.c
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@ -123,7 +123,7 @@ SYSCTL_INT(_kern, OID_AUTO, sync_on_panic, CTLFLAG_RW | CTLFLAG_TUN,
&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);