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Hisashi Hifumi authored
I found bugs on error handlings in the functions arround the ext3 file system, which cause inadequate completions of synchronous write I/O operations when disk I/O failures occur. Both 2.4 and 2.6 have this problem. I carried out following experiment: 1. Mount a ext3 file system on a SCSI disk with ordered mode. 2. Open a file on the file system with O_SYNC|O_RDWR|O_TRUNC|O_CREAT flag. 3. Write 512 bytes data to the file by calling write() every 5 seconds, and examine return values from the syscall. from write(). 4. Disconnect the SCSI cable, and examine messages from the kernel. After the SCSI cable is disconnected, write() must fail. But the result was different: write() succeeded for a while even though messages of the kernel notified SCSI I/O error. By applying following modifications, the above problem was solved. Signed-off-by: Hisashi Hifumi <hifumi.hisashi@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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