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SubjectStill data corruption with LTP doio on 2.6.17rc
Date

I'm still seeing data corruption when running LTP over NFS
between two 2.6.17rc* hosts. I already saw this before 2.6.16
and reported.

Server is running knfsd 2.6.17-rc4-git9, client is running 2.6.17-rc6
with nfsroot. Both x86-64 and SUSE 10.0 userland. The file system
is exported as async and mounted with
/dev/root / nfs rw,vers=2,rsize=4096,wsize=4096,hard,nolock,proto=udp,timeo=11,retrans=2,addr=10.23.204.1 0 0

First I always get lots of

do_vfs_lock: VFS is out of sync with lock manager!

messages on the client. They don't seem to be directly related though.

I set up ltp-full-20051103 on the NFS root and run it on the client
with runltplite.sh. Eventually it reports


<<<test_start>>>
tag=rwtest03 stime=1149754762
cmdline="export LTPROOT; rwtest -N rwtest03 -c -q -i 60s -n 2 -f buffered -s mmread,mmwrite -m random -Dv 10%25000:mm-buff-$$"
contacts=""
analysis=exit
initiation_status="ok"
<<<test_output>>>

doio(rwtest03) ( 8155) 08:19:23
---------------------
*** DATA COMPARISON ERROR ***
check_file(/tmp/ltp-2256/mm-buff-8139, 7813848, 81293, U:8155:bigfoot:doio*, 20, 0) failed

Comparison fd is 3, with open flags 0
Corrupt regions follow - unprintable chars are represented as '.'
-----------------------------------------------------------------
corrupt bytes starting at file offset 7813848
1st 32 expected bytes: U:8155:bigfoot:doio*U:8155:bigfo
1st 32 actual bytes: ................................

Request number 36
fd 4 is file /tmp/ltp-2256/mm-buff-8139 - open flags are 02 O_RDWR,
write done at file offset 7813848 - pattern is U (0125)
number of requests is 1, strides per request is 1
i/o byte count = 81293
memory alignment is unaligned

syscall: mmap-write(NULL, 12800000, PROT_WRITE, MAP_SHARED, 4, 0)
file is mmaped to: 0x2b73b87f0000
file-mem=0x2b73b8f63ad8, length=81293, buffer=0x52d540


est03) ( 8152) 08:19:23
---------------------
(parent) pid 8155 exited because of data compare errors

doio(rwtest03) ( 8154) 08:19:23
---------------------
*** DATA COMPARISON ERROR ***
check_file(/tmp/ltp-2256/mm-buff-8139, 4223869, 130577, X:8154:bigfoot:doio*, 20, 0) failed

Comparison fd is 4, with open flags 0
Corrupt regions follow - unprintable chars are represented as '.'
-----------------------------------------------------------------
corrupt bytes starting at file offset 4349952
1st 32 expected bytes: 154:bigfoot:doio*X:8154:bigfoot:
1st 32 actual bytes: ................................

Request number 36
fd 3 is file /tmp/ltp-2256/mm-buff-8139 - open flags are 02 O_RDWR,
write done at file offset 4223869 - pattern is X (0130)
number of requests is 1, strides per request is 1
i/o byte count = 130577
memory alignment is unaligned

syscall: mmap-write(NULL, 12800000, PROT_WRITE, MAP_SHARED, 3, 0)
file is mmaped to: 0x2b73b87f0000
file-mem=0x2b73b8bf737d, length=130577, buffer=0x52d540


doio(rwtest03) ( 8152) 08:19:23
---------------------
(parent) pid 8154 exited because of data compare errors
rwtest(rwtest03) : iogen reported errors (r=141)
rwtest03 1 FAIL : Test failed
<<<execution_status>>>
duration=1 termination_type=exited termination_id=2 corefile=no
cutime=1 cstime=7
<<<test_end>>>
<<<test_start>>>
tag=rwtest04 stime=1149754763
cmdline="export LTPROOT; rwtest -N rwtest04 -c -q -i 60s -n 2 -f sync -s mmread,mmwrite -m random -Dv 10%25000:mm-sync-$$"
contacts=""
analysis=exit
initiation_status="ok"
<<<test_output>>>

doio(rwtest04) ( 8174) 08:19:23
---------------------
*** DATA COMPARISON ERROR ***
check_file(/tmp/ltp-2256/mm-sync-8159, 12102771, 46088, O:8174:bigfoot:doio*, 20, 0) failed

Comparison fd is 4, with open flags 0
Corrupt regions follow - unprintable chars are represented as '.'
-----------------------------------------------------------------
corrupt bytes starting at file offset 12128256
1st 32 expected bytes: 4:bigfoot:doio*O:8174:bigfoot:do
1st 32 actual bytes: ................................

Request number 11
fd 3 is file /tmp/ltp-2256/mm-sync-8159 - open flags are 010002 O_RDWR,O_SYNC,
write done at file offset 12102771 - pattern is O (0117)
number of requests is 1, strides per request is 1
i/o byte count = 46088
memory alignment is unaligned

syscall: mmap-write(NULL, 12800000, PROT_WRITE, MAP_SHARED, 3, 0)
file is mmaped to: 0x2b8b163cc000
file-mem=0x2b8b16f56c73, length=46088, buffer=0x52d546


doio(rwtest04) ( 8172) 08:19:23
---------------------
(parent) pid 8174 exited because of data compare errors
rwtest(rwtest04) : doio reported errors (r=4)
rwtest04 1 FAIL : doio reported errors (r=4)
rwtest04 1 FAIL : Test failed
<<<execution_status>>>
duration=66 termination_type=exited termination_id=4 corefile=no
cutime=33 cstime=170
<<<test_end>>>


-Andi
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