A frozen member (SIGSTOPped tmux server) cost every user one synchronous
3 s block of the event loop per minute (F37's back-off ceiling). Member
listing now runs through async execFile (same 3 s / SIGKILL / 1 MiB
bounds, same back-off) into the listed cache the synchronous readers
(liveSessions, listSessions, listOutput) already use: stale-while-
revalidate, 15 s max age, cold or failing = that member's panes UNKNOWN
(F38 unchanged). A session this process creates or kills is written into
the member's cached answer at once, and a list in flight across that
change is dropped. Host tmux calls, local mode and every click's call
(new-session, send-keys, kill, has-session) are unchanged.
review5's stalled-member test now polls for 4 s past the timeout and
asserts each poll < 100 ms, event-loop stall < 500 ms and one sudo
(old code: first poll 3157 ms).
nntrivi2001
4407b3bb16