Re: help w/panic under heavy load - 5.4

From: Giorgos Keramidas (keramida_at_freebsd.org)
Date: 07/20/05

  • Next message: Edwin: "Re: help w/panic under heavy load - 5.4" 
    Date: Wed, 20 Jul 2005 13:06:23 +0300
To: Edwin <edwin@verolan.com>

    On 2005-07-19 22:03, Edwin <edwin@verolan.com> wrote:
    > Hi John,
    >
    > Updated the kernel, same crash under load, looks like m is null, you're right.
    >
    > Not quite sure where to go from here. I'm happy to do the footwork - just still real
    > hazy on the BSD kernel part of things.
    >
    > panic: m_copym, offset > size of mbuf chain
    > KDB: enter: panic
    > [thread pid 27 tid 100021 ]
    > Stopped at kdb_enter+0x2b: nop
    > db> where
    > Tracing pid 27 tid 100021 td 0xc0ed0180
    > kdb_enter(c0821a6a) at kdb_enter+0x2b
    > panic(c0826049,0,c076b79c,c102d600,100) at panic+0xbb
    > m_copym(0,5dc,5c8,1,14) at m_copym+0x60
    > ip_fragment(c123180e,c76d1c38,5dc,0,1) at ip_fragment+0x214
    > ip_fastforward(c11fee00) at ip_fastforward+0x6ed
    > ether_demux(c0f90000,c11fee00,52,c0f8aad0,1f) at ether_demux+0x259
    > ether_input(c0f90000,c11fee00,c0f902d0,0,c08336ab) at ether_input+0x25d
    > sis_rxeof(c0f90000,1,5,c08e5500,c76d1ce0) at sis_rxeof+0x1ab
    > sis_poll(c0f90000,0,5) at sis_poll+0x7f
    > netisr_poll(0) at netisr_poll+0x188
    > swi_net(0) at swi_net+0x81
    > ithread_loop(c0ec6580,c76d1d48,c0ec6580,c060030c,0) at ithread_loop+0x124
    > fork_exit(c060030c,c0ec6580,c76d1d48) at fork_exit+0xa4
    > fork_trampoline() at fork_trampoline+0x8
    > --- trap 0x1, eip = 0, esp = 0xc76d1d7c, ebp = 0 ---

    Both tracebacks contain sis_poll() somewhere in the call stack? Are you
    using POLLING? If yes, can you try without POLLING and see if the crash
    can still be reproduced?

    - Giorgos

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