d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't take Giant for SMP status and cpu topology sysctls.

Browse Source 
Not only this lock doesn't play any role here, dirtying it slows down
other things a little bit as giant-held checks (e.g. DROP_GIANT) are
spread all over the kernel.

MFC after:	1 week
This commit is contained in:
mjg 2017-10-18 22:00:44 +00:00
parent 2e0c4e791c
commit 8f29191fc8
2 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/kern/sched_ule.c
View File

@ -2939,7 +2939,7 @@ SYSCTL_INT(_kern_sched, OID_AUTO, steal_idle, CTLFLAG_RW, &steal_idle, 0,
SYSCTL_INT(_kern_sched, OID_AUTO, steal_thresh, CTLFLAG_RW, &steal_thresh, 0,
"Minimum load on remote CPU before we'll steal");
SYSCTL_PROC(_kern_sched, OID_AUTO, topology_spec, CTLTYPE_STRING |
CTLFLAG_RD, NULL, 0, sysctl_kern_sched_topology_spec, "A",
CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_kern_sched_topology_spec, "A",
"XML dump of detected CPU topology");
#endif

5
sys/kern/subr_smp.c
View File

@ -84,8 +84,9 @@ SYSCTL_INT(_kern_smp, OID_AUTO, maxid, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxid, 0,
SYSCTL_INT(_kern_smp, OID_AUTO, maxcpus, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_maxcpus,
0, "Max number of CPUs that the system was compiled for.");
SYSCTL_PROC(_kern_smp, OID_AUTO, active, CTLFLAG_RD | CTLTYPE_INT, NULL, 0,
sysctl_kern_smp_active, "I", "Indicates system is running in SMP mode");
SYSCTL_PROC(_kern_smp, OID_AUTO, active, CTLFLAG_RD|CTLTYPE_INT|CTLFLAG_MPSAFE,
NULL, 0, sysctl_kern_smp_active, "I",
"Indicates system is running in SMP mode");
int smp_disabled = 0; /* has smp been disabled? */
SYSCTL_INT(_kern_smp, OID_AUTO, disabled, CTLFLAG_RDTUN|CTLFLAG_CAPRD,