On 08/17/2016 06:54 PM, Mike Snitzer wrote:
On Wed, Aug 17 2016 at 8:29pm -0400,
Bart Van Assche <bart.vanassche@xxxxxxxxxxx> wrote:
Earlier today I came up with three patches that avoid the hang in
truncate_inode_pages_range() that I had reported before. It would be
appreciated if you could have a look at these patches. Please keep
in mind that I'm not a dm expert.
I don't recall where you mentioned a hang in
truncate_inode_pages_range().. ah I see it here:
https://patchwork.kernel.org/patch/9202331/
Hello Mike,
As usual, thanks for the quick feedback. But it seems like I sent my
e-mail too soon: after I had sent my e-mail I ran again into the
truncate_inode_pages_range() hang. So far I have run the fio + simulated
cable pulling test with the following configurations:
* scsi-mq + single queue dm: hang occurs after a few iterations.
* scsi-mq + dm-mq: hang occurs after a few iterations.
* single queue scsi + dm-mq: test passes.
I will have another look at the blk-mq core and scsi-mq core layers.
Bart.
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