New: Bad flush cache

https://bugzilla.kernel.org/show_bug.cgi?id=60191

           Summary: Bad flush cache
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 3.8.13
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
        AssignedTo: [email protected]
        ReportedBy: [email protected]
        Regression: No

Hello to all, I'm Toni and it's my first Kernel bug. I hope help to detect problems on kernels (I'm not developer but yes detector ;))

Ok, and now start.

When I dump image into SD card with IO operations apparently ok, and it continue past 100% (cache flushing) I can see that the writing is not 100% busy time on the output device. The IO monitor show this.

For example, I can show: 100% 1 second, 0% 1 second, 100% 2 seconds, 0% 0,5 seconds...

AND, in some situations, the umount on FAT32 on USB drives sometimes not really umount well, but this is other war.

Cheers!

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