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SubjectRe: perf top -p broken for multithreaded processes since 5.19
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On 2/09/22 17:46, Tomáš Trnka wrote:
> Hello,
>
> A bug in perf v5.19 and newer completely breaks monitoring multithreaded
> processes using "perf top -p". The tool fails to start with "Failed to mmap
> with 22 (Invalid argument)". It still seems to work fine on single-threaded
> processes. "perf record" is also unaffected.

It has been reported here:

https://bugzilla.kernel.org/show_bug.cgi?id=216441

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