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authorMarkus Metzger <markus.t.metzger@intel.com>2009-04-03 16:43:35 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-07 13:36:13 +0200
commite2b371f00a6f529f6362654239bdec8dcd510760 (patch)
tree36e47cd9fb949fd72893c2d5ddab489fa55b1869 /mm/mlock.c
parenta26b89f05d194413c7238e0bea071054f6b5d3c8 (diff)
downloadlinux-2.6.34-ux500-e2b371f00a6f529f6362654239bdec8dcd510760.tar.gz
mm, x86, ptrace, bts: defer branch trace stopping
When a ptraced task is unlinked, we need to stop branch tracing for that task. Since the unlink is called with interrupts disabled, and we need interrupts enabled to stop branch tracing, we defer the work. Collect all branch tracing related stuff in a branch tracing context. Reviewed-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: roland@redhat.com Cc: eranian@googlemail.com Cc: juan.villacis@intel.com Cc: ak@linux.jf.intel.com LKML-Reference: <20090403144550.712401000@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/mlock.c')
-rw-r--r--mm/mlock.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/mm/mlock.c b/mm/mlock.c
index cbe9e0581b7..749383b442c 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -660,21 +660,20 @@ void *alloc_locked_buffer(size_t size)
return buffer;
}
-void release_locked_buffer(void *buffer, size_t size)
+void refund_locked_buffer_memory(struct mm_struct *mm, size_t size)
{
unsigned long pgsz = PAGE_ALIGN(size) >> PAGE_SHIFT;
- down_write(&current->mm->mmap_sem);
+ down_write(&mm->mmap_sem);
- current->mm->total_vm -= pgsz;
- current->mm->locked_vm -= pgsz;
+ mm->total_vm -= pgsz;
+ mm->locked_vm -= pgsz;
- up_write(&current->mm->mmap_sem);
+ up_write(&mm->mmap_sem);
}
void free_locked_buffer(void *buffer, size_t size)
{
- release_locked_buffer(buffer, size);
-
+ refund_locked_buffer_memory(current->mm, size);
kfree(buffer);
}