On 2016/2/4 12:25, Mike Snitzer wrote:
> On Wed, Feb 03 2016 at 10:49pm -0500,
> jiangyiwen wrote:
>
>> On 2016/2/4 11:24, Mike Snitzer wrote:
>>> On Wed, Feb 03 2016 at 9:08pm -0500,
>>> jiangyiwen wrote:
>>>
When two processes submit WRTIE SAME bio simultaneously and
first IO return
> "Mike" == Mike Snitzer writes:
Mike> The SCSI, or block layer, should return a non-retryable error for
Mike> this case. But we only have the differentiated IO errors for SCSI
Mike> cmds that are issued, so it seems we still need to train SCSI (and
Mike> block by association/dependency) to
On Wed, Feb 03 2016 at 10:49pm -0500,
jiangyiwen wrote:
> On 2016/2/4 11:24, Mike Snitzer wrote:
> > On Wed, Feb 03 2016 at 9:08pm -0500,
> > jiangyiwen wrote:
> >
> >> When two processes submit WRTIE SAME bio simultaneously and
> >> first IO return failed because of INVALID FIELD IN CDB, and
On 2016/2/4 11:24, Mike Snitzer wrote:
> On Wed, Feb 03 2016 at 9:08pm -0500,
> jiangyiwen wrote:
>
>> When two processes submit WRTIE SAME bio simultaneously and
>> first IO return failed because of INVALID FIELD IN CDB, and
>> then second IO can enter into an infinite loop.
>> The problem can
On Wed, Feb 03 2016 at 9:08pm -0500,
jiangyiwen wrote:
> When two processes submit WRTIE SAME bio simultaneously and
> first IO return failed because of INVALID FIELD IN CDB, and
> then second IO can enter into an infinite loop.
> The problem can be described as follows:
>
> process 1
When two processes submit WRTIE SAME bio simultaneously and
first IO return failed because of INVALID FIELD IN CDB, and
then second IO can enter into an infinite loop.
The problem can be described as follows:
process 1 process 2
submit_bio(REQ_WRITE_SAME) and
wait io c
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