perf record: Allow using switch-output=time together with signal

The use case is, I'd like to switch upon signal but still protect with a timeout.

Merge tag 'v6.3' into granulate-perf

Linux 6.3

Merge tag 'v6.0' into granulate-perf

Linux 6.0

Merge tag 'v5.18' into granulate-perf

Linux 5.18

perf inject: Keep previous cmdline

Force "perf inject" to write the cmdline it has read from the input file,
instead of writing its own cmdline. "perf inject" cmdline is hardly useful,
"perf record"s is what we care about.

Do note it's not exactly complete - I did not change write_cmdline() so
that one still writes readlink("/proc/self/exe") of "perf inject" as the
argv[0], and we drop the argv[0] we've read from the file. Unless you use
different "perf" binaries for "record" and "inject", this doesn't matter.

Signed-off-by: Yonatan Goldschmidt <[email protected]>

Revert "perf: Use exec_comm instead of comm when printing"

This reverts commit 8c3e6c8.

It created some unwanted side effects, such as modifying the "swapper" stacks.

perf: Use exec_comm instead of comm when printing

Process names are much clearer as the first line in a flamegraph
If we ever want to upstream this, it needs to be a separate option

perf inject: Keep previous cmdline

Force "perf inject" to write the cmdline it has read from the input file,
instead of writing its own cmdline. "perf inject" cmdline is hardly useful,
"perf record"s is what we care about.

Do note it's not exactly complete - I did not change write_cmdline() so
that one still writes readlink("/proc/self/exe") of "perf inject" as the
argv[0], and we drop the argv[0] we've read from the file. Unless you use
different "perf" binaries for "record" and "inject", this doesn't matter.

Signed-off-by: Yonatan Goldschmidt <[email protected]>

Linux 5.6

Linux 5.6-rc7