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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 machines to maximize performance. (To disable malloc debugging, run
ln -s aj /etc/malloc.conf.) 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: 20111215:
The carp(4) facility has been changed significantly. Configuration The carp(4) facility has been changed significantly. Configuration
of the CARP protocol via ifconfig(8) has changed, as well as format 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"); &sync_on_panic, 0, "Do a sync before rebooting from a panic");
TUNABLE_INT("kern.sync_on_panic", &sync_on_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, SYSCTL_INT(_kern, OID_AUTO, stop_scheduler_on_panic, CTLFLAG_RW | CTLFLAG_TUN,
&stop_scheduler_on_panic, 0, "stop scheduler upon entering panic"); &stop_scheduler_on_panic, 0, "stop scheduler upon entering panic");
TUNABLE_INT("kern.stop_scheduler_on_panic", &stop_scheduler_on_panic); TUNABLE_INT("kern.stop_scheduler_on_panic", &stop_scheduler_on_panic);