Messages in this thread |  | | From | Marek Majkowski <> | Date | Tue, 4 Feb 2020 15:09:48 +0000 | Subject | Re: perf not picking up symbols for namespaced processes |
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On Fri, Dec 6, 2019 at 2:17 AM Ivan Babrou <ivan@cloudflare.com> wrote: > > I'm not very good at this, but the following works for me. If you this > is in general vicinity of what you expected, I can email patch > properly. >
Thanks for the patch, I can confirm it works. I had this problem today when playing with gvisor. Gvisor is starting up in a fresh mount namespace and perf fails to read the symbols. Stracing perf shows:
11913 openat(AT_FDCWD, "/proc/9512/ns/mnt", O_RDONLY) = 197 11913 setns(197, CLONE_NEWNS) = 0 11913 stat("/home/marek/bin/runsc-debug", 0x7fffffff8480) = -1 ENOENT (No such file or directory) 11913 setns(196, CLONE_NEWNS) = 0
Which of course makes no sense - the runsc-debug binary does not exist in the empty mount namespace of the restricted runsc process.
Marek
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