[Bug 56831] New: RHEL Linux Data Corruption found with EXT4 system

[Bug 56831] New: RHEL Linux Data Corruption found with EXT4 system

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56831

           Summary: RHEL Linux Data Corruption found with EXT4 system
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.32-220
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: searchfordave@gmail.com
                CC: lalwanihiro@gmail.com
        Regression: No


The attached file when compiled on a 32GB Mem system, gives a data corruption
if run with number of threads greater than 15

How to run:
1. compile: # gcc random_multi_write_read.c -o test -lpthread
2. Usage:   # ./test <file path> <no. of threads>
3. Run:     # ./test file_1 15

Sample Output:
Starting 15 write threads to file_1 at different offsets and write sizes...
Parallelly reading the file for any data corruption...
DATA CORRUPTION HIT
Actual: '', Expected: 'K'd
, start:4581061500, end:5039167650
...

For More info, refer file "V_loop<%d>char<%c>" which gets created newly to
capture the corrupted data as soon as corruption is hit.

Test system details:
#CPUS: 2
#CORES: 6
SYSTEM MEMORY: 15 GB
SWAP MEMORY: 17 GB

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[Bug 56831] RHEL Linux Data Corruption found with EXT4 system

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56831





--- Comment #1 from searchfordave@gmail.com  2013-04-19 13:42:27 ---
Created an attachment (id=99321)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=99321)
File "random_multi_write_read.c" gives data corruption on ext4

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[Bug 56831] RHEL Linux Data Corruption found with EXT4 system

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56831

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alan@lxorguk.ukuu.org.uk

--- Comment #2 from Alan <alan@lxorguk.ukuu.org.uk> ---
2.6.32 is obsolete, please take this up with your Red Hat support

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[Bug 56831] RHEL Linux Data Corruption found with EXT4 system

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56831

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

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[Bug 56831] RHEL Linux Data Corruption found with EXT4 system

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=56831

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED
         Resolution|CODE_FIX                    |OBSOLETE

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