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    Subject[dma-debug.c - DMA-API] exceeded overlapping … & s ym53c8xx … tries to free DMA …

    Ahoy!

    Perhaps this is already solved, but I made ​​the effort to test & record
    all of this, therefore here you are. :)

    https://bugzilla.redhat.com/show_bug.cgi?id=1062833

    0.
    VirtIO disk - virtio-pc OK:
    - lspci-knn-3.14.0-0.rc2.git2.1.fc21.x86_64-virtio-pc-virtio-disk-OK
    https://bugzilla.redhat.com/attachment.cgi?id=863135
    - dmesg-3.14.0-0.rc2.git2.1.fc21.x86_64-virtio-pc-virtio-disk-OK
    https://bugzilla.redhat.com/attachment.cgi?id=863136


    1.
    IDE disk - ata_piix:
    - lspci-knn-3.14.0-0.rc2.git2.1.fc21.x86_64-ata_piix-ide-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863137
    - dmesg-3.14.0-0.rc2.git2.1.fc21.x86_64-ata_piix-ide-disk
    "WARNING: CPU: 0 PID: 1328 at lib/dma-debug.c:491
    add_dma_entry+0x127/0x130()"
    "DMA-API: exceeded 7 overlapping mappings of pfn 2137"
    https://bugzilla.redhat.com/attachment.cgi?id=863138


    2.
    SATA disk - ahci:
    - lspci-knn-3.14.0-0.rc2.git2.1.fc21.x86_64-ahci-sata-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863139
    - dmesg-3.14.0-0.rc2.git2.1.fc21.x86_64-ahci-sata-disk
    "WARNING: CPU: 0 PID: 1543 at lib/dma-debug.c:491
    add_dma_entry+0x127/0x130()"
    "DMA-API: exceeded 7 overlapping mappings of pfn 2137"
    https://bugzilla.redhat.com/attachment.cgi?id=863140


    3.
    SCSI disk - sym53c8xx:
    - lspci-knn-3.14.0-0.rc2.git2.1.fc21.x86_64-sym53c8xx-scsi-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863151
    - dmesg-3.14.0-0.rc2.git2.1.fc21.x86_64-sym53c8xx-scsi-disk
    "WARNING: CPU: 1 PID: 1514 at lib/dma-debug.c:491
    add_dma_entry+0x127/0x130()"
    "DMA-API: exceeded 7 overlapping mappings of pfn 2137"
    ~~
    "WARNING: CPU: 1 PID: 1514 at lib/dma-debug.c:1041
    check_unmap+0x8b7/0x9b0()"
    "sym53c8xx 0000:00:07.0: DMA-API: device driver tries to free DMA memory
    it has not allocated [device address=0x0000000002137000] [size=512 bytes]"
    https://bugzilla.redhat.com/attachment.cgi?id=863152


    4.
    VirtIO SCSI disk - 'virtio-scsi' & sym53c8xx:
    - lspci-knn-3.14.0-0.rc2.git2.1.fc21.x86_64-sym53c8xx-virtio-scsi-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863153
    - dmesg-3.14.0-0.rc2.git2.1.fc21.x86_64-sym53c8xx-virtio-scsi-disk
    "WARNING: CPU: 0 PID: 1530 at lib/dma-debug.c:491
    add_dma_entry+0x127/0x130()"
    "DMA-API: exceeded 7 overlapping mappings of pfn 2137"
    ~~
    "WARNING: CPU: 0 PID: 1530 at lib/dma-debug.c:1041
    check_unmap+0x8b7/0x9b0()"
    "sym53c8xx 0000:00:07.0: DMA-API: device driver tries to free DMA memory
    it has not allocated [device address=0x0000000002137000] [size=512 bytes]"
    https://bugzilla.redhat.com/attachment.cgi?id=863154


    5.
    USB disk - usb-storage:
    - lspci-knn-3.14.0-0.rc2.git2.1.fc21.x86_64-usb-storage-usb-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863156
    - lsusb-3.14.0-0.rc2.git2.1.fc21.x86_64-usb-storage-usb-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863157
    - lsusb-t-3.14.0-0.rc2.git2.1.fc21.x86_64-usb-storage-usb-disk
    https://bugzilla.redhat.com/attachment.cgi?id=863158
    - dmesg-3.14.0-0.rc2.git2.1.fc21.x86_64-usb-storage-usb-disk
    "WARNING: CPU: 0 PID: 415 at lib/dma-debug.c:491
    add_dma_entry+0x127/0x130()"
    "DMA-API: exceeded 7 overlapping mappings of pfn 2137"
    https://bugzilla.redhat.com/attachment.cgi?id=863159


    Tested with:
    http://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/x86_64/os/images/
    boot.iso 13-Feb-2014 15:45 362M

    checkisomd5:
    boot.iso: 434371185df324e28ff5652891ae4ea8
    Fragment sums: 5a3e92cebf4721fcfad3e317bff6ac4ec9df98fedd9f53c3c3f2ed55c337
    Fragment count: 20
    Press [Esc] to abort check.
    Checking: 100.0%

    The media check is complete, the result is: PASS.

    It is OK to use this media.

    sha256sum:
    2b6aac6e9b55c5f49f251340a4c28e091998f9fe3a6bdba7542f0f9b2d69ba8c boot.iso


    poma


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