Skip site navigation (1)Skip section navigation (2) 
Date:      Sat, 23 Feb 2013 08:19:25 +0000 (UTC)
From:      Dmitry Chagin <dchagin@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-user@freebsd.org
Subject:   svn commit: r247173 - in user/dchagin/lemul/sys: kern sys
Message-ID:  <201302230819.r1N8JPbT017726@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help 
Author: dchagin
Date: Sat Feb 23 08:19:24 2013
New Revision: 247173
URL: http://svnweb.freebsd.org/changeset/base/247173

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().

Modified:
  user/dchagin/lemul/sys/kern/kern_thr.c
  user/dchagin/lemul/sys/sys/syscallsubr.h

Modified: user/dchagin/lemul/sys/kern/kern_thr.c
==============================================================================
--- user/dchagin/lemul/sys/kern/kern_thr.c	Sat Feb 23 08:17:44 2013	(r247172)
+++ user/dchagin/lemul/sys/kern/kern_thr.c	Sat Feb 23 08:19:24 2013	(r247173)
@@ -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:
@@ -195,11 +189,9 @@ 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);
 
@@ -560,3 +552,20 @@ 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: user/dchagin/lemul/sys/sys/syscallsubr.h
==============================================================================
--- user/dchagin/lemul/sys/sys/syscallsubr.h	Sat Feb 23 08:17:44 2013	(r247172)
+++ user/dchagin/lemul/sys/sys/syscallsubr.h	Sat Feb 23 08:19:24 2013	(r247173)
@@ -223,6 +223,7 @@ int	kern_symlink(struct thread *td, char
 	    enum uio_seg segflg);
 int	kern_symlinkat(struct thread *td, char *path1, int fd, char *path2,
 	    enum uio_seg segflg);
+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);

Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201302230819.r1N8JPbT017726>