[PATCH blktests 0/2] Test multipath and marginal ports

[Shin'ichiro Kawasaki]

On Aug 14, 2026 / 10:18, Jesse Taube wrote:
...
> > I applied the series on top of v7.2-rc7 kernel. Then I ran the test case added
> > by this blktests series and observed the failurea below:
> >
> > nvme/070 (tr=fc) (test nvme-fc marginal path handling)       [failed]
> >     runtime  33.581s  ...  33.028s
> >     --- tests/nvme/070.out      2026-08-14 12:03:21.338000000 +0900
> >     +++ /home/shin/Blktests/blktests/results/nodev_tr_fc/nvme/070.out.bad       2026-08-14 20:17:04.731000000 +0900
> >     @@ -2,7 +2,8 @@
> >      Starting background I/O
> >      Testing iopolicy: numa
> >      Changing FC links to online
> >     -Set all online: pass
> >     +No FC ports are being used, expected atleast one in use when all are online in numa mode.
> >     +Set all online: fail
> >      One host marginal: pass
> >     ...
> >     (Run 'diff -u tests/nvme/070.out /home/shin/Blktests/blktests/results/nodev_tr_fc/nvme/070.out.bad' to see the entire diff)
> >
> > Is this failure expected?
> 
> No. I can't reproduce the issue either.
> Does this happen consistently?

Yes, it happnes always I run the test case. After I rebased to v7.2 kernel, it
shows a bit different message:

nvme/070 (tr=fc) (test nvme-fc marginal path handling)       [failed]
    runtime  37.200s  ...  38.926s
    --- tests/nvme/070.out      2026-08-17 11:13:53.073000000 +0900
    +++ /home/shin/Blktests/blktests/results/nodev_tr_fc/nvme/070.out.bad       2026-08-17 16:34:17.997000000 +0900
    @@ -3,10 +3,14 @@
     Testing iopolicy: numa
     Changing FC links to online
     Set all online: pass
    -One host marginal: pass
    +FC port on (/sys/class/nvme-subsystem/nvme-subsys6/nvme6) is being used, expected no use.
    +One host marginal: fail
     All marginal: pass
    ...
    (Run 'diff -u tests/nvme/070.out /home/shin/Blktests/blktests/results/nodev_tr_fc/nvme/070.out.bad' to see the entire diff)

> Maybe the links are still connecting?

Should I try to add some sleeps in the test script? If so, could you suggest
where to put the sleeps?

If it helps, I will share the kernel config I use. If you want it, please let
me know.