Re: [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently

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Artem Bokhan wrote:
> When I run 'dd if=/dev/sda of=/dev/null skip=9700 bs=1M' and it meets
> bad block, it takes about
> '/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/0000:02:02.0/host4/target4:0:0/4:0:0:0/timeout
> + about 10 seconds' to determine I/O error. Until that IO to device is
> locked, as I understand. I want to reduce the time of lock as  much as
> possible.
> 
> dd: reading `/dev/sda': Input/output error
> 240+1 records in
> 240+1 records out
> 252575744 bytes (253 MB) copied, 13.7833 s, 18.3 MB/s

Can you post timestamped dmesg?

-- 
tejun
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