svn commit: r283373 - in head/sys: kern sys
Dmitry Chagin
dchagin at FreeBSD.org
Sun May 24 14:37:46 UTC 2015
Author: dchagin
Date: Sun May 24 14:37:45 2015
New Revision: 283373
URL: https://svnweb.freebsd.org/changeset/base/283373
Log:
In preparation for switching linuxulator to the use the native 1:1
threads introduce kern_thr_alloc() which will be used later in the
linux_clone().
Differential Revision: https://reviews.freebsd.org/D1029
Reviewed by: trasz
Modified:
head/sys/kern/kern_thr.c
head/sys/sys/syscallsubr.h
Modified: head/sys/kern/kern_thr.c
==============================================================================
--- head/sys/kern/kern_thr.c Sun May 24 14:36:33 2015 (r283372)
+++ head/sys/kern/kern_thr.c Sun May 24 14:37:45 2015 (r283373)
@@ -162,12 +162,6 @@ create_thread(struct thread *td, mcontex
p = td->td_proc;
- /* Have race condition but it is cheap. */
- if (p->p_numthreads >= max_threads_per_proc) {
- ++max_threads_hits;
- return (EPROCLIM);
- }
-
if (rtp != NULL) {
switch(rtp->type) {
case RTP_PRIO_REALTIME:
@@ -197,11 +191,9 @@ create_thread(struct thread *td, mcontex
#endif
/* Initialize our td */
- newtd = thread_alloc(0);
- if (newtd == NULL) {
- error = ENOMEM;
+ error = kern_thr_alloc(p, 0, &newtd);
+ if (error)
goto fail;
- }
cpu_set_upcall(newtd, td);
@@ -566,3 +558,20 @@ sys_thr_set_name(struct thread *td, stru
PROC_UNLOCK(p);
return (error);
}
+
+int
+kern_thr_alloc(struct proc *p, int pages, struct thread **ntd)
+{
+
+ /* Have race condition but it is cheap. */
+ if (p->p_numthreads >= max_threads_per_proc) {
+ ++max_threads_hits;
+ return (EPROCLIM);
+ }
+
+ *ntd = thread_alloc(pages);
+ if (*ntd == NULL)
+ return (ENOMEM);
+
+ return (0);
+}
Modified: head/sys/sys/syscallsubr.h
==============================================================================
--- head/sys/sys/syscallsubr.h Sun May 24 14:36:33 2015 (r283372)
+++ head/sys/sys/syscallsubr.h Sun May 24 14:37:45 2015 (r283373)
@@ -214,6 +214,7 @@ int kern_ktimer_settime(struct thread *t
int kern_ktimer_gettime(struct thread *td, int timer_id,
struct itimerspec *val);
int kern_ktimer_getoverrun(struct thread *td, int timer_id);
+int kern_thr_alloc(struct proc *, int pages, struct thread **);
int kern_thr_exit(struct thread *td);
int kern_thr_new(struct thread *td, struct thr_param *param);
int kern_thr_suspend(struct thread *td, struct timespec *tsp);
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