On Mon, May 17, 2010 at 2:09 PM, Peter Zijlstra <pet...@infradead.org> wrote: > On Mon, 2010-05-17 at 14:04 +0200, Stephane Eranian wrote: >> >> > So you want to preserve this state for when you munmap() and mmap() >> > again? The only user of data->lost is writing the PERF_RECORD_LOST >> > event, which only ever happens when you have pages, so counting it when >> > there's no pages seems futile. >> >> You're right. But couldn't you report lost samples in the buffer header as >> well? > > I guess you could, but what's the point? If you ask for sampling but > don't provide a buffer you don't get anything -- how's that a surprise? > Fine. I'll update the patch to not account for data->lost.
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