On Thu, Sep 21, 2023 at 2:53 AM Bob Pearson <rpearsonhpe@xxxxxxxxx> wrote:
>
> On 9/20/23 12:22, Bart Van Assche wrote:
> > On 9/20/23 10:18, Bob Pearson wrote:
> >> But I have also seen the same behavior in the siw driver which is
> >> completely independent.
> >
> > Hmm ... I haven't seen any hangs yet with the siw driver.
>
> I was on Ubuntu 6-9 months ago. Currently I don't see hangs on either.
> >
> >> As mentioned above at the moment Ubuntu is failing rarely. But it used to fail reliably (srp/002 about 75% of the time and srp/011 about 99% of the time.) There haven't been any changes to rxe to explain this.
> >
> > I think that Zhu mentioned commit 9b4b7c1f9f54 ("RDMA/rxe: Add workqueue
> > support for rxe tasks")?
>
> That change happened well before the failures went away. I was seeing failures at the same rate with tasklets
> and wqs. But after updating Ubuntu and the kernel at some point they all went away.
I made tests on the latest Ubuntu with the latest kernel without the
commit 9b4b7c1f9f54 ("RDMA/rxe: Add workqueue support for rxe tasks").
The latest kernel is v6.6-rc2, the commit 9b4b7c1f9f54 ("RDMA/rxe: Add
workqueue support for rxe tasks") is reverted.
I made blktest tests for about 30 times, this problem does not occur.
So I confirm that without this commit, this hang problem does not
occur on Ubuntu without the commit 9b4b7c1f9f54 ("RDMA/rxe: Add
workqueue support for rxe tasks").
Nanthan
>
> >
> > Thanks,
> >
> > Bart.
>
>
