On Mon, Dec 11, 2017 at 07:09:31AM +1100, Peter Jeremy wrote: > I was experimenting with ports/devel/libmill (which is a library that > provides Go-styly functionality for C programs) and managed to create > an unkillable process by spawning 1000000 "goroutines" (think very > cheap "thread" or "coroutine") joined by "channels" (think message > passing pipes). (The program ran basically instantaneously with 10000 > or 100000 "goroutines", and the Go version has no problems with 1000000 > goroutines on a much smaller system). > > According to SIGINFO, it's blocked on "vm map (user)" but I can't kill > it. Can anyone suggest a way to unwedge it? > > This is on a system running FreeBSD/amd64 11.1-STABLE r324494. Ensure that you use at least r326188.
> > server% procstat -kk 452 > PID TID COMM TDNAME KSTACK > 452 102382 chain - mi_switch+0x17c > sleepq_switch+0x118 sleepq_wait+0x43 _sx_slock_hard+0x34e _sx_slock+0xd4 > vm_map_lookup+0xbd vm_fault_hold+0x194b vm_fault+0x75 trap_pfault+0x107 > trap+0x382 calltrap+0x8 There is another thread owning the map lock, and seeing what that thread does is the next step. Can you provide a binary to reproduce which does not depend on any library except the base libs ? _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
