On Wed, May 18, 2005 at 03:10:08PM +0100, James Chapman wrote:
> I'm seeing corrupt data when trying to read/write files >4GB in a
> realtime partition. Are there any known bugs in this area? Corruption
> only occurs when the file grows larger than 4GB. No problems are seen
> when using non-realtime XFS partitions.
>
> Kernel: 2.4.29
> Arch: MIPS
Hmm, I can't reproduce this on i386 with a current (CVS) kernel,
both buffered and direct realtime IO looks OK at offsets larger
than 4GB. Does this sequence fail for you too?...
[root@bruce xfstests]# xfs_io -Rf /mnt/xfs0/realtime
xfs_io> pwrite 5g 4k
wrote 4096/4096 bytes at offset 5368709120
4 KiB, 1 ops; 0.0000 sec (15.024 MiB/sec and 3846.1538 ops/sec)
xfs_io> quit
[root@bruce xfstests]# od -x /mnt/xfs0/realtime
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
50000000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
50000010000
bruce xfs-cmds/xfstests# xfs_io -Rdf /mnt/xfs0/realtime-direct
xfs_io> pwrite 5g 4k
wrote 4096/4096 bytes at offset 5368709120
4 KiB, 1 ops; 0.0000 sec (208.965 KiB/sec and 52.2411 ops/sec)
xfs_io> q
bruce xfs-cmds/xfstests# od -x /mnt/xfs0/realtime-direct
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
50000000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
50000010000
cheers.
--
Nathan
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