On Wed, 18 Apr 2007, Derrick J Brashear wrote:
On Wed, 18 Apr 2007, Stephan Wiesand wrote:
Alas, I'm afraid this is the point where I'll need either some guidance or
a lot of reading and experimenting to get any further.
in the afs_HashOutDCache frame, knowing the contents of adc, us, and i would
be a start.
Ok. After recompiling the module with debug information and making the
system panic once more:
crash> bt
PID: 22914 TASK: d5dd0000 CPU: 0 COMMAND: "afs_cachetrim"
#0 [d5dd1c98] netconsole_netdump at f8a1d793
#1 [d5dd1cac] try_crashdump at c0129033
#2 [d5dd1cbc] die at c010c6f2
#3 [d5dd1cd0] do_page_fault at c0120389
#4 [d5dd1d94] error_code (via page_fault) at c02b01c0
EAX: 00000009 EBX: f8b74000 ECX: 00000046 EDX: c0388e98 EBP: d5dd1dec
DS: 0068 ESI: f8bff380 ES: 0068 EDI: 0005578e
CS: 0060 EIP: f8a6da1e ERR: ffffffff EFLAGS: 00010282
#5 [d5dd1dd0] osi_Panic at f8a6da1e
#6 [d5dd1df0] afs_HashOutDCache at f8a2dd1b
#7 [d5dd1e20] afs_GetDownD at f8a2d990
#8 [d5dd1f90] afs_CacheTruncateDaemon at f8a2cf1d
#9 [d5dd1fd0] afsd_thread at f8a7f947
#10 [d5dd1ff0] kernel_thread_helper at c01095cb
crash> bt -f
...
#5 [d5dd1dd0] osi_Panic at f8a6da1e
[RA: f8a2dd20 SP: d5dd1dd4 FP: d5dd1df0 SIZE: 32]
d5dd1dd4: f8a9377b d5dd0000 00000000 f8a46614
d5dd1de4: ffffffff ffffffff d5dd1e1c f8a2dd20
#6 [d5dd1df0] afs_HashOutDCache at f8a2dd1b
[RA: f8a2d995 SP: d5dd1df4 FP: d5dd1e20 SIZE: 48]
d5dd1df4: f8a9377b d5dd0000 00000000 f8a46614
d5dd1e04: d617b080 ffffbea5 d5dd1e1c f8bff380
d5dd1e14: 0005578c 00000000 d5dd1f8c f8a2d995
#7 [d5dd1e20] afs_GetDownD at f8a2d990
[RA: f8a2cf22 SP: d5dd1e24 FP: d5dd1f90 SIZE: 368]
d5dd1e24: f8bff380 00000000 00000000 ffffbea1
...
crash> struct dcache f8bff380
struct dcache {
lruq = {
next = 0xf8c1a5e0,
prev = 0xf8c28780
},
dirty = {
next = 0xf8bf39e8,
prev = 0xf8bfdf88
},
lock = {
wait_states = 0 '\0',
excl_locked = 0 '\0',
readers_reading = 0,
num_waiting = 0,
spare = 0,
time_waiting = {
tv_sec = 0,
tv_usec = 0
},
pid_last_reader = 0x0,
pid_writer = 0x0,
src_indicator = 0
},
tlock = {
wait_states = 0 '\0',
excl_locked = 0 '\0',
readers_reading = 0,
num_waiting = 0,
spare = 0,
time_waiting = {
tv_sec = 0,
tv_usec = 0
},
pid_last_reader = 0x0,
pid_writer = 0x0,
src_indicator = 0
},
mflock = {
wait_states = 0 '\0',
excl_locked = 0 '\0',
readers_reading = 0,
num_waiting = 0,
spare = 0,
time_waiting = {
tv_sec = 0,
tv_usec = 0
},
pid_last_reader = 0x0,
pid_writer = 0x0,
src_indicator = 0
},
validPos = 10240,
index = 21237,
refCount = 1,
dflags = 0 '\0',
mflags = 0 '\0',
f = {
fid = {
Cell = 64,
Fid = {
Volume = 536889412,
Vnode = 17,
Unique = 1748941
}
},
modTime = 1176990967,
versionNo = {
high = 0,
low = 235
},
chunk = 0,
inode = 100511,
chunkBytes = 10240,
states = 0 '\0'
}
}
crash>
I guess I successfully located adc. But I'm too dumb to find i and us.
--
Stephan Wiesand
DESY - DV -
Platanenallee 6
15738 Zeuthen, Germany
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