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* LTP NFS data corruption in 2.6.15-git9
@ 2006-01-13 20:37 Andi Kleen
  2006-01-13 20:38 ` LTP NFS data corruption in 2.6.15-git9 II Andi Kleen
  0 siblings, 1 reply; 2+ messages in thread
From: Andi Kleen @ 2006-01-13 20:37 UTC (permalink / raw)
  To: okir, neilb, trond.myklebust; +Cc: nfs


FWIW - i was just running LTP- for 2.6.15-git9 on a x86-64 nfs root machine
talking to 2.6.15 machine with NFSv3/UDP. During the IO tests I got 
this. Export was with rw,async. 

The network was 100 GBit/s so I wouldn't assume it was caused by 
fragment reordering [Why UDP? That is what the kernel nfs root 
mounter selected]

To reproduce just run LTP 20051103 runltp over NFS.

-Andi

doio(rwtest03) (21516) 04:19:53
---------------------
*** DATA COMPARISON ERROR ***
check_file(/tmp/ltp-16542/mm-buff-21500, 6133913, 37155, B:21516:linux:doio*, 19
, 0) failed

Comparison fd is 3, with open flags 0
Corrupt regions follow - unprintable chars are represented as '.'
-----------------------------------------------------------------
corrupt bytes starting at file offset 6160384
    1st 32 expected bytes:  516:linux:doio*B:21516:linux:doi
    1st 32 actual bytes:    ................................

Request number 12
          fd 4 is file /tmp/ltp-16542/mm-buff-21500 - open flags are 02 O_RDWR,
          write done at file offset 6133913 - pattern is B (0102)
          number of requests is 1, strides per request is 1
          i/o byte count = 37155
          memory alignment is unaligned

syscall:  mmap-write(NULL, 12800000, PROT_WRITE, MAP_SHARED, 4, 0)
        file is mmaped to: 0xf71f2000
        file-mem=0xf77cb899, length=37155, buffer=0x8073368


doio(rwtest03) (21514) 04:19:53
---------------------
(parent) pid 21516 exited because of data compare errors
rwtest(rwtest03) : doio reported errors (r=4)
rwtest03    1  FAIL  :  doio reported errors (r=4)
rwtest03    1  FAIL  :  Test failed

doio(rwtest04) (21540) 04:21:03
---------------------
*** DATA COMPARISON ERROR ***
check_file(/tmp/ltp-16542/mm-sync-21525, 12522037, 83920, Q:21540:linux:doio*, 1
9, 0) failed

Comparison fd is 5, with open flags 0
Corrupt regions follow - unprintable chars are represented as '.'
-----------------------------------------------------------------
corrupt bytes starting at file offset 12582913
    1st 32 expected bytes:  Q:21540:linux:doio*Q:21540:linux
    1st 32 actual bytes:    B:21541:linux:doio*B:21541:linux

Request number 126
          fd 4 is file /tmp/ltp-16542/mm-sync-21525 - open flags are 010002 O_RD
WR,O_SYNC,
          write done at file offset 12522037 - pattern is Q (0121)
          number of requests is 1, strides per request is 1
          i/o byte count = 83920
          memory alignment is unaligned

syscall:  mmap-write(NULL, 12800000, PROT_WRITE, MAP_SHARED, 4, 0)
        file is mmaped to: 0xf7257000
        file-mem=0xf7e48235, length=83920, buffer=0x8073369


doio(rwtest04) (21539) 04:21:03
---------------------
(parent) pid 21540 exited because of data compare errors


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2006-01-13 20:37 LTP NFS data corruption in 2.6.15-git9 Andi Kleen
2006-01-13 20:38 ` LTP NFS data corruption in 2.6.15-git9 II Andi Kleen

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