[Qemu-devel] IO errors in guest caused by LTP dio test

[Andi Kleen]

Running LTP testcases/kernel/io/direct_io/test_dma_thread_diotest7
causes IO errors in the guest.  There are no IO errors on the host.

Kernel Linux 3.0.0-rc*
Using a standard emulated IDE -hda image.

I tried a few qemu versions, it happens at least with the one
in FC14 and with 0.14. qemu master doesn't boot and ends
with a spinlock lockup.

Writing file _dma_thread_test_0010.tmp.
Writing file _dma_thread_test_0011.tmp.
Writing file _dma_thread_test_0012.tmp.
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata1.00: BMDMA stat 0x5
ata1.00: failed command: WRITE DMA EXT
ata1.00: cmd 35/00:00:e9:6c:ba/00:04:00:00:00/e0 tag 0 dma 524288 out
         res 41/04:00:e9:6c:ba/04:00:e9:6c:ba/e0 Emask 0x1 (device
         error)
ata1.00: status: { DRDY ERR }
ata1.00: error: { ABRT }
ata1.00: configured for MWDMA2
ata1: EH complete
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata1.00: BMDMA stat 0x5
ata1.00: failed command: WRITE DMA EXT
ata1.00: cmd 35/00:00:e9:6c:ba/00:04:00:00:00/e0 tag 0 dma 524288 out
         res 41/04:00:e9:6c:ba/04:00:e9:6c:ba/e0 Emask 0x1 (device
         error)
ata1.00: status: { DRDY ERR }
ata1.00: error: { ABRT }
ata1.00: configured for MWDMA2
ata1: EH complete
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata1.00: BMDMA stat 0x5
ata1.00: failed command: WRITE DMA EXT
ata1.00: cmd 35/00:00:e9:6c:ba/00:04:00:00:00/e0 tag 0 dma 524288 out
         res 41/04:00:e9:6c:ba/04:00:e9:6c:ba/e0 Emask 0x1 (device
         error)
ata1.00: status: { DRDY ERR }
ata1.00: error: { ABRT }
ata1.00: configured for MWDMA2
ata1: EH complete
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata1.00: BMDMA stat 0x5
ata1.00: failed command: WRITE DMA EXT
ata1.00: cmd 35/00:00:e9:6c:ba/00:04:00:00:00/e0 tag 0 dma 524288 out
         res 41/04:00:e9:6c:ba/04:00:e9:6c:ba/e0 Emask 0x1 (device
         error)
ata1.00: status: { DRDY ERR }
ata1.00: error: { ABRT }
ata1.00: configured for MWDMA2
ata1: EH complete
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata1.00: BMDMA stat 0x5

-- 
address@hidden -- Speaking for myself only