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authorEric B Munson <ebmunson@us.ibm.com>2010-05-18 15:30:49 +0100
committerIngo Molnar <mingo@elte.hu>2010-06-09 11:12:34 +0200
commit3af9e859281bda7eb7c20b51879cf43aa788ac2e (patch)
treecddb7fc788abc826551e12bba5892c6b26942392 /mm/mmap.c
parent8ed92280be013180e24c84456ab6babcb07037cc (diff)
downloadlinux-3af9e859281bda7eb7c20b51879cf43aa788ac2e.tar.bz2
perf: Add non-exec mmap() tracking
Add the capacility to track data mmap()s. This can be used together with PERF_SAMPLE_ADDR for data profiling. Signed-off-by: Anton Blanchard <anton@samba.org> [Updated code for stable perf ABI] Signed-off-by: Eric B Munson <ebmunson@us.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1274193049-25997-1-git-send-email-ebmunson@us.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/mmap.c')
-rw-r--r--mm/mmap.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 456ec6f27889..e38e910cb756 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1734,8 +1734,10 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
grow = (address - vma->vm_end) >> PAGE_SHIFT;
error = acct_stack_growth(vma, size, grow);
- if (!error)
+ if (!error) {
vma->vm_end = address;
+ perf_event_mmap(vma);
+ }
}
anon_vma_unlock(vma);
return error;
@@ -1781,6 +1783,7 @@ static int expand_downwards(struct vm_area_struct *vma,
if (!error) {
vma->vm_start = address;
vma->vm_pgoff -= grow;
+ perf_event_mmap(vma);
}
}
anon_vma_unlock(vma);
@@ -2208,6 +2211,7 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
vma->vm_page_prot = vm_get_page_prot(flags);
vma_link(mm, vma, prev, rb_link, rb_parent);
out:
+ perf_event_mmap(vma);
mm->total_vm += len >> PAGE_SHIFT;
if (flags & VM_LOCKED) {
if (!mlock_vma_pages_range(vma, addr, addr + len))