Hi,

Kurt Schreiner <ks@ub.uni-mainz.de> wrote:
> Hi,
> 
> trying "build.sh -j 8 ..." w/ a kernel build from -current
> cvs update'd an hour or so ago (userland two or three weeks
> old) and using the new scheduler results in:
> 
> NetBSD/amd64 (isunopti) (console)
> 
> login: Stopped in pid 8208.1 (nbmake) at       netbsd:breakpoint+0x1:  ret
> db{0}> bt
> breakpoint() at netbsd:breakpoint+0x1
> Xintr_ioapic_edge4() at netbsd:Xintr_ioapic_edge4+0xd7
> --- interrupt ---
> mutex_spin_retry() at netbsd:mutex_spin_retry+0x65
> sched_nextlwp() at netbsd:sched_nextlwp+0xcc
> mi_switch() at netbsd:mi_switch+0x1d5
> sleepq_block() at netbsd:sleepq_block+0x11a
> cv_wait_sig() at netbsd:cv_wait_sig+0x124
> pipe_read() at netbsd:pipe_read+0x32d
> dofileread() at netbsd:dofileread+0x89
> sys_read() at netbsd:sys_read+0x99
> syscall_plain() at netbsd:syscall_plain+0x1cb
> 
> Here the machine hangs hard and has to be power cycled...

Have you compiled the kernel with LOCKDEBUG and DIAGNOSTIC options? It would
be good to see what is the output of "show sched" in DDB, if possible.

-- 
Best regards,
Mindaugas
www.NetBSD.org