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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-02-26 10:33:41 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-26 10:56:52 +0100 |
| commit | 3a0304e90aa5a2c0c308a05d28f7d109a48d8539 (patch) | |
| tree | 7bb1b0344fad89429c2d87d1f0a02f0a8e4b180b /kernel/perf_event.c | |
| parent | 628ada0cb03666dd463f7c25947eaccdf440c309 (diff) | |
| download | lwn-3a0304e90aa5a2c0c308a05d28f7d109a48d8539.tar.gz lwn-3a0304e90aa5a2c0c308a05d28f7d109a48d8539.zip | |
perf_events: Report the MMAP pgoff value in bytes
DaveM reported that currently perf interprets the pgoff value reported by
the MMAP events as a byte range, but the kernel reports it as a page
offset.
Since its broken (and unusable) anyway, change the kernel behaviour (ABI)
to report bytes indeed, avoiding the need for userspace to deal with
PAGE_SIZE things.
Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
| -rw-r--r-- | kernel/perf_event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 087025fe3ba1..5a69abb05ac3 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -3749,7 +3749,7 @@ void __perf_event_mmap(struct vm_area_struct *vma) /* .tid */ .start = vma->vm_start, .len = vma->vm_end - vma->vm_start, - .pgoff = vma->vm_pgoff, + .pgoff = (u64)vma->vm_pgoff << PAGE_SHIFT, }, }; |