Re: SCHEDULE and high load situations

From: Martin Blapp <mb_at_imp.ch>
Date: Thu, 12 Aug 2004 15:33:39 +0200 (CEST)
Hi,

With the lastest ULE changes, the stress test doesn't run 30 seconds
till FreeBSD crashes. Since the machine is spare, I'm still connected
to it. I can give you access if you like. Note that this is a new panic
message.

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x14
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc066a1c7
stack pointer           = 0x10:0xe2626aa8
frame pointer           = 0x10:0xe2626ab8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 27897 (mimedefang)

Mimedefang is threaded and uses currently libpthreads (kse).

x/x 0xc066a1c7
unp_connect2+0x2a:      f144b89

db> where
unp_connect2(c4bb78a4,c39cc13c,0,0,0) at unp_connect2+0x2a
unp_connect(c4bb78a4,c43d9380,c4dee9a0,c43d9380,80) at unp_connect+0x3d5
uipc_connect(c4bb78a4,c43d9380,c4dee9a0) at uipc_connect+0x76
soconnect(c4bb78a4,c43d9380,c4dee9a0,0,bf1dad88) at soconnect+0x54
kern_connect(c4dee9a0,3,c43d9380,c43d9380,c3e958ac) at kern_connect+0xb0
connect(c4dee9a0,e2626d14,c,c4dee9a0,e2626d3c) at connect+0x42
syscall(2f,2f,2f,bf1dad88,bf1dad8a) at syscall+0x300
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (98, FreeBSD ELF32, connect), eip = 0x28101d23, esp = 0xbf1dad74, ebp = 0xbf1dae10 ---

db> show registers
cs                 0x8
ds                0x10
es                0x10
fs                0x18
ss                0x10
eax                0x2
ecx         0xc3a79ec4
edx               0x29
ebx                  0
esp         0xe2626aa8
ebp         0xe2626ab8
esi         0xc39cc13c
edi         0xc4bb78a4
eip         0xc066a1c7  unp_connect2+0x2a
efl            0x10246
dr0                  0
dr1                  0
dr2                  0
dr3                  0
dr4         0xffff0ff0
dr5              0x400
dr6         0xffff0ff0
dr7              0x400
unp_connect2+0x2a:      movl    %ecx,0x14(%ebx)

Martin
Received on Thu Aug 12 2004 - 11:33:52 UTC

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