[dm-devel] [v4.13-rc BUG] system lockup when running big buffered write(4M) to IB SRP via mpath

[Bart Van Assche]

On Wed, 2017-08-09 at 12:43 -0400, Laurence Oberman wrote:
> Your latest patch on stock upstream without Ming's latest patches is 
> behaving for me.
> 
> As already mentioned, the requeue -11 and clone failure messages are 
> gone and I am not actually seeing any soft lockups or hard lockups.
> 
> When Ming gets back I will work with him on his patch set and the lockups.
> 
> Running 10 parallel writes which easily trips into soft lockups on 
> Ming's kernel (even with your patch) has been stable here on 4.13-RC3 
> with your patch.
> 
> I will leave it running for a while now but the patch is good.
> 
> If it survives 4 hours I will add a Tested-by to your latest patch.

Hello Laurence,

I'm working on an additional patch that should reduce unnecessary requeuing
even further. I will let you know when it's ready.

Additionally, please trim e-mails when replying such that e-mails do not get
too long.

Thanks,

Bart.