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Subjectcpqarray SMP 2.4.14
Hi everybody

I'd a thread with Mark Hahn and Denis Vlasenko about cpqarray and SMP
problems with 2.4.14. but they told me that it's better to go now on the
mailing list because the problem become harder.

I'll resume this and hope it will be usefull for everybody.

The machine:

Compaq Proliant DL 360
2 HD scsi 9,1 G
Raid 1
2 eepro 100
SMP (but 1 CPU)

The partitions:

/dev/ida/c0d0p1 swap
/dev/ida/c0d0p2 /
/dev/ida/c0d0p3 /tmp
/dev/ida/c0d0p4 /var

The problems:

1 When i want to edit a file: /var/log/mylogdir/mylogfile (140 Mb)
the server hangs whith this messages:

invalid operand
EIP: 0010:[<c0123154>] Not tainted
EFLAGS: 00010046
eax: 00000000 ebx: d99a9f60 ecx: 00000002 edx: c1665740
esi: 00000002 edi: c1665740 ebp: 00000001 esp: c01fbf18
ds: 0018 es: 0018 ss: 0018
Process swapper (pid: 0, stackpage=c01fb000)
Stack: d99a9f60 c012f92b 00000000 dfa01f48 c1821800 e082a885 d99a9f60
dfffa680 24000001 00000003 c01fbf94 00000002 c0107f8d 00000003
c01fbf94 00000060 c0230960 00000003 c01fbf8c
c01080f6 00000003
Call Trace: [<c012f92b>] [<e082a885>] [<c0107f8d>] [<c01080f6>]
[<c01053e9>] [<c0105360>] [<c0109ed8>] [<c0105360>] [<c0105360>]
[<c0105383>] [<c01053e9<] [<c0105000>] [<c0105027>]

Code: 0f 0b 8d 5a 24 8d 42 28 39 42 28 74 11 b9 01 00 00 00 ba 03
<0>Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing

2 If i want to copy /var/log/mylogdir/mylogfile

Kernel says:

invalid request on ida/c0d0 = (cmd=30 sect=837624 cnt=248 sg=1 ret=10)

When this arrived i didn't know about ksymoops but i find in Sysmap
only answers for "Call Trace":

c0105360 t default_idle
c0105000 T _stex

I think to that when the system want to swap it hangs to (writing on
another partition), and it was the same when he wants to rotate a file
which is to big for the "bug" .

I've to say that these didn't arrived when i did the same tests with
little files.


When i tried to find a solution for this problem, i read the kernel
changelogs since the 2.4.13 and if find that the cpqarray was modified
for the 2.4.14, then i downgrad to the 2.4.13 and now everything work

Can you confirm that downgrading was the solution or explain if it's
another problem and which one.

Is the modification for cpqarray solving this problem (i don't want to
use it now it's only for my knowledge :-) ).

I'll thank you very much

Best regards

PS: excuse me for my bad english

Pascal Brugier
Easter-eggs Spécialiste GNU/Linux
44-46 rue de l'Ouest - 75014 Paris - France - Métro Gaité
Phone: +33 (0) 1 43 35 00 37 - Fax: +33 (0) 1 43 35 00 76 -
709D77A2 - ED24 4E29 E5B4 FDE7 56A4 352D F24E 7E68 709D 77A2
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