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authorUlrich Drepper <drepper@redhat.com>2007-05-10 23:38:55 +0000
committerUlrich Drepper <drepper@redhat.com>2007-05-10 23:38:55 +0000
commit3771196d1d5ac6a4213fdb77b4974ca69cd1ae09 (patch)
treea0158e9daf2ba473c3a24e4ba3c068ea4aa36bc9 /sysdeps
parentf9bf102dd663c2e498e7755bb4bd35d79c8dc37b (diff)
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* sysdeps/unix/sysv/linux/sched_setaffinity.c cvs/fedora-glibc-20070510T2308 cvs/fedora-glibc-20070510T2304
	(__sched_setaffinity_new): If syscall was successful and
	RESET_VGETCPU_CACHE is defined, use it before returning.
	* sysdeps/unix/sysv/linux/x86_64/sched_setaffinity.c: New file.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/sched_setaffinity.c12
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/sched_setaffinity.c14
2 files changed, 24 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/sched_setaffinity.c b/sysdeps/unix/sysv/linux/sched_setaffinity.c
index ccd3c8f514..77cde47692 100644
--- a/sysdeps/unix/sysv/linux/sched_setaffinity.c
+++ b/sysdeps/unix/sysv/linux/sched_setaffinity.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2005, 2007
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -67,7 +68,14 @@ __sched_setaffinity_new (pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
 	return -1;
       }
 
-  return INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
+  int result = INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
+
+#ifdef RESET_VGETCPU_CACHE
+  if (result != -1)
+    RESET_VGETCPU_CACHE ();
+#endif
+
+  return result;
 }
 versioned_symbol (libc, __sched_setaffinity_new, sched_setaffinity,
 		  GLIBC_2_3_4);
diff --git a/sysdeps/unix/sysv/linux/x86_64/sched_setaffinity.c b/sysdeps/unix/sysv/linux/x86_64/sched_setaffinity.c
new file mode 100644
index 0000000000..d1101c56f5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/sched_setaffinity.c
@@ -0,0 +1,14 @@
+#include <tls.h>
+
+#define RESET_VGETCPU_CACHE() \
+  do {			      \
+    asm volatile ("movl %0, %%fs:%P1\n\t"				      \
+		  "movl %0, %%fs:%P2"					      \
+		  :							      \
+		  : "ir" (0), "i" (offsetof (struct pthread,		      \
+					     header.vgetcpu_cache[0])),	      \
+		    "i" (offsetof (struct pthread,			      \
+				   header.vgetcpu_cache[1])));		\
+  } while (0)
+
+#include "../sched_setaffinity.c"