Oleg Nesterov <o...@redhat.com> writes:
> [...]
> Well, not sure this will help... but if you can reproduce this,
> may be you can identify the sender of the wrong SIGHUP at least.
>
> cd /sys/kernel/debug/tracing/
> echo "sig==1" >> events/signal/signal_generate/filter
> echo 1 >> options/stacktrace
> echo 1 >> events/signal/signal_generate/enable
> cat trace_pipe > SIGHUP_TRACE
FWIW, just in case your ftrace subsystem is already busy, this
two-liner is equivalent:
# stap -o SIGHUP_TRACE -e 'probe kernel.trace("signal_generate")
{ if ($sig==1) print_backtrace() }'
- FChE
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