malloc: Use __get_nprocs on arena_get2 (BZ 30945)

This restore the 2.33 semantic for arena_get2.  It was changed by
11a02b035b46 to avoid arena_get2 call malloc (back when __get_nproc
was refactored to use an scratch_buffer - 903bc7dcc2acafc).  The
__get_nproc was refactored over then and now it also avoid to call
malloc.

The 11a02b035b46 did not take in consideration any performance
implication, which should have been discussed properly.  The
__get_nprocs_sched is still used as a fallback mechanism if procfs
and sysfs is not acessible.

Checked on x86_64-linux-gnu.
Reviewed-by: DJ Delorie <dj@redhat.com>
(cherry picked from commit 472894d2cfee5751b44c0aaa71ed87df81c8e62e)

diff --git a/include/sys/sysinfo.h b/include/sys/sysinfo.h
index c490561581733038fa4ac0377143125bb133a8be..65742b10366590f053a97b77310316012d54d588 100644 (file)
--- a/include/sys/sysinfo.h
+++ b/include/sys/sysinfo.h
@@ -14,10 +14,6 @@ libc_hidden_proto (__get_nprocs_conf)
 extern int __get_nprocs (void);
 libc_hidden_proto (__get_nprocs)
 
-/* Return the number of available processors which the process can
-   be scheduled.  */
-extern int __get_nprocs_sched (void) attribute_hidden;
-
 /* Return number of physical pages of memory in the system.  */
 extern long int __get_phys_pages (void);
 libc_hidden_proto (__get_phys_pages)

diff --git a/malloc/arena.c b/malloc/arena.c
index f1f0af86489d00639ecfc102c11240feb491278d..667484630ed0afa5152fb324abd58e4c51b173e2 100644 (file)
--- a/malloc/arena.c
+++ b/malloc/arena.c
@@ -879,7 +879,7 @@ arena_get2 (size_t size, mstate avoid_arena)
             narenas_limit = mp_.arena_max;
           else if (narenas > mp_.arena_test)
             {
-              int n = __get_nprocs_sched ();
+              int n = __get_nprocs ();
 
               if (n >= 1)
                 narenas_limit = NARENAS_FROM_NCORES (n);

diff --git a/misc/getsysstats.c b/misc/getsysstats.c
index 57d93601e21265d73341e03ea2849b59eb41d819..0eedface6d2b0f75bc3c894ea71f7b849834060b 100644 (file)
--- a/misc/getsysstats.c
+++ b/misc/getsysstats.c
@@ -45,12 +45,6 @@ weak_alias (__get_nprocs, get_nprocs)
 link_warning (get_nprocs, "warning: get_nprocs will always return 1")
 
 
-int
-__get_nprocs_sched (void)
-{
-  return 1;
-}
-
 long int
 __get_phys_pages (void)
 {

diff --git a/sysdeps/mach/getsysstats.c b/sysdeps/mach/getsysstats.c
index cc8023f979bf6f74b63bc1878ecad39ffeedd959..1267f39da26aee38f934b6b3eb9237313bb81be5 100644 (file)
--- a/sysdeps/mach/getsysstats.c
+++ b/sysdeps/mach/getsysstats.c
@@ -62,12 +62,6 @@ __get_nprocs (void)
 libc_hidden_def (__get_nprocs)
 weak_alias (__get_nprocs, get_nprocs)
 
-int
-__get_nprocs_sched (void)
-{
-  return __get_nprocs ();
-}
-
 /* Return the number of physical pages on the system. */
 long int
 __get_phys_pages (void)

diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
index 327802b14c7326a3fb95b6b099e3bb746ed1eb1a..9c3182fd3392738e426f97f93ab29dd263ac7b2d 100644 (file)
--- a/sysdeps/unix/sysv/linux/getsysstats.c
+++ b/sysdeps/unix/sysv/linux/getsysstats.c
@@ -31,7 +31,7 @@
 #include <sys/sysinfo.h>
 #include <sysdep.h>
 
-int
+static int
 __get_nprocs_sched (void)
 {
   enum