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This also fixes bug that timer->recurrent was not cleared
in tm_new() and unexpected recurrence of startup timer
in BGP confused state machine and caused crash.
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WALK_LIST_DELSAFE (in ev_run_list) is not safe with regard
to deletion of next node. When some events are rescheduled
during event execution, it may lead to deletion of next
node and some events are skipped. Such skipped nodes remain
in temporary list on stack and the last of them contains
'next' pointer to stack area. When this event is later
scheduled, it damages stack area trying to remove it from
the list, which leads to random crashes with funny
backtraces :-) .
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call ev_schedule() on the same handler which should work perfectly now.
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ev_run_list() now returns number of events which remain in the list.
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for processing in next event cycle. This can be used to prevent background
actions (hint: user commands) from hogging the CPU for too long time.
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should work now. Initial feeding of protocols by interfaces/routes is
done from the event queue to prevent unwanted recursion.
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