Re: Ugly BETA5 crashes, VM fault (with trace)

Am Mittwoch, 12. Oktober 2005 20:33 CEST schrieb Andrew Gallatin:
> Can you start gdb on your kernel.debug, and
> show the output of: "list *vm_page_cowsetup+0x2e"
>
> Thanks,

Thank you for the hint, unfortunately I rebuilt my kernel (very_late 
BETA5->RC1) and forgot that kernel.debug won't be in /boot/kernel.old.
But from the new kernel.debug I get something (to me) senseful:

builder_cale:usr/src/sys/CALE#11: gdb kernel.debug
GNU gdb 6.1.1 [FreeBSD]
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This GDB was configured as "i386-marcel-freebsd"...
(gdb) list *vm_page_cowsetup+0x2e
0xc06fd7be is in vm_page_cowsetup (/usr/src/sys/vm/vm_page.c:1699).
1694    void
1695    vm_page_cowsetup(vm_page_t m)
1696    {
1697
1698            mtx_assert(&vm_page_queue_mtx, MA_OWNED);
1699            m->cow++;
1700            pmap_page_protect(m, VM_PROT_READ);
1701    }
1702
1703    #include "opt_ddb.h"
(gdb)  

Thanks! And Robert Watson's assumption is correct: I'm using 
zero_copy_sockets.
My HW is really underdimensioned/oldfashioned so I tried to squeeze out the 
last thing possible ;)

-Harry