On Thu, 2010-07-08 at 13:35 -0400, Christoph Hellwig wrote: > What kind of infrastructure is perf using for recording > mmap()/mremap()/brk() information? A direct hook into mmap_region(), see perf_event_mmap(). We used to only track VM_EXEC regions, but these days we can also track data regions (although it wouldn't track mremap and brk I think). We need the VM_EXEC maps to make sense of the instruction pointer samples. Eric recently added support for !VM_EXEC mmap() in order to interpret linear addresses provided by things like the software pagefault events and certain powerpc hardware events. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href