Messages in this thread | | | Date | Wed, 1 Jun 2022 11:04:04 -0700 | From | Beau Belgrave <> | Subject | Perf MMAP records differ from /proc/[X]/maps when chroot is used |
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I noticed a related conversation that occurred in the past here: https://lore.kernel.org/lkml/20220202070828.143303-1-namhyung@kernel.org/
I hit this same issue, however, during debugging I noticed that when chroot is used the full path including the chroot are in /proc/[X]/maps. The perf MMAP records only give the relative path within the chroot.
This causes different views of a process when combining mmaps that existed before perf_event_open() via /proc/[X]/maps and observed mmaps within the perf_event_open() ring buffer.
I would like to know if this is how mmap records are wanted to be represented long term via perf? It would be great if these mmap records aligned with how /proc/[X]/maps are represented so chroot usage becomes (mostly) seamless.
Thanks, -Beau
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