Messages in this thread | | | Date | Thu, 23 May 2013 10:10:36 -0400 (EDT) | From | Vince Weaver <> | Subject | Re: OOPS in perf_mmap_close() |
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I can confirm your patch avoids the oops on my machine.
It does lead to interesting behavior if I run the sample program multiple times (with added printfs):
vince@core2:~$ ./perf_mmap_close_bug mmap1=0x7f06a6e90000 mmap2=0x7f06a6e7f000 vince@core2:~$ ./perf_mmap_close_bug mmap1=0x7f878a138000 mmap2=0x7f878a127000 vince@core2:~$ ./perf_mmap_close_bug mmap1=0xffffffffffffffff Error opening fd2 Invalid argument
and then it never successfully completes again. Is this unexpected behavior? Or just a normal mmap/perf interaction that I don't understand?
Vince
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