Re: Fatal page fault in cbq_enqueue()

[Brian Buhrow <buhrow%nfbcal.org@localhost>]

	Hello.  We use altq plus pf all over the place in our company.  We've
looked at using npf, but it doesn't have the feature set we need to make
all of our stuff go.  Right now, we're using NetBSD-5, which is rock solid
in terms of reliability.  I don't know if it's easier to make pf and altq
work in NET_MPSAFE mode, or add the missing functionality to npf, but for
my part, I think it's easier for me to fix  pf plus altq in terms of using
it in an SMP environment than it is to add the missing features to npf.  
-thanks
-Brian

On Sep 26, 11:37am, Paul Ripke wrote:
} Subject: Re: Fatal page fault in cbq_enqueue()
} Recently upgraded to netbsd-8 branch, and I'm still seeing these
} occassionally. Eg:
} 
} Sep 25 20:57:16 slave /netbsd: fatal page fault in supervisor mode
} Sep 25 20:57:16 slave /netbsd: trap type 6 code 0 rip 0xffffffff807a68b9 cs 0x8 rflags 0x10286 cr2 0x8 ilevel 0x8 rsp 0xfffffe80400077e0
} Sep 25 20:57:16 slave /netbsd: curlwp 0xfffffe811f932420 pid 0.3 lowest kstack 0xfffffe80400042c0
} Sep 25 20:57:16 slave /netbsd: panic: trap
} Sep 25 20:57:16 slave /netbsd: cpu0: Begin traceback...
} Sep 25 20:57:16 slave /netbsd: vpanic() at netbsd:vpanic+0x140
} Sep 25 20:57:16 slave /netbsd: snprintf() at netbsd:snprintf
} Sep 25 20:57:16 slave /netbsd: trap() at netbsd:trap+0xc6b
} Sep 25 20:57:16 slave /netbsd: --- trap (number 6) ---
} Sep 25 20:57:16 slave /netbsd: rmc_queue_packet() at netbsd:rmc_queue_packet+0x150
} Sep 25 20:57:16 slave /netbsd: cbq_enqueue() at netbsd:cbq_enqueue+0xee
} Sep 25 20:57:16 slave /netbsd: ifq_enqueue2() at netbsd:ifq_enqueue2+0xc4
} Sep 25 20:57:16 slave /netbsd: sppp_output() at netbsd:sppp_output+0x1ab
} Sep 25 20:57:16 slave /netbsd: ip6_if_output() at netbsd:ip6_if_output+0x60
} Sep 25 20:57:16 slave /netbsd: ipf_fastroute() at netbsd:ipf_fastroute+0x97e
} Sep 25 20:57:16 slave /netbsd: ipf_send_ip() at netbsd:ipf_send_ip+0x13d
} Sep 25 20:57:16 slave /netbsd: ipf_check() at netbsd:ipf_check+0xcfc
} Sep 25 20:57:16 slave /netbsd: pfil_run_hooks() at netbsd:pfil_run_hooks+0x117
} Sep 25 20:57:16 slave /netbsd: ip6_input() at netbsd:ip6_input+0x278
} Sep 25 20:57:16 slave /netbsd: ip6intr() at netbsd:ip6intr+0x71
} Sep 25 20:57:16 slave /netbsd: softint_dispatch() at netbsd:softint_dispatch+0xd3
} Sep 25 20:57:16 slave /netbsd: DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xfffffe8040007ff0
} Sep 25 20:57:16 slave /netbsd: Xsoftintr() at netbsd:Xsoftintr+0x4f
} 
} Are there many users of altq+ipf out there? Perhaps now is a good time to
} switch to npf...
} 
} -- 
} Paul Ripke
} "Great minds discuss ideas, average minds discuss events, small minds
}  discuss people."
} -- Disputed: Often attributed to Eleanor Roosevelt. 1948.
>-- End of excerpt from Paul Ripke