Re: [PATCH -next v4 1/3] selftests/memory-hotplug: Add checking after online or offline

[zhaogongyi]

Hi!

> 
> On 29.09.22 09:39, zhaogongyi wrote:
> > Hi,
> >
> > We can not get the EBUSY from " echo 0 >
> /sys/devices/system/memory/memoryxxx/online", maybe, redirect the error
> ouput to /dev/null is suitable when calling offline_memory_expect_success():
> >
> > # sh mem-on-off-test.sh -a
> > mem-on-off-test.sh: illegal option -- a Test scope: 2% hotplug memory
> >           online all hot-pluggable memory in offline state:
> >                   SKIPPED - no hot-pluggable memory in offline state
> >           offline 2% hot-pluggable memory in online state
> >           trying to offline 4 out of 192 memory block(s):
> > online->offline memory0
> > online->offline memory10
> > online->offline memory100
> > online->offline memory101
> > online->offline memory102
> > online->offline memory103
> > online->offline memory104
> > online->offline memory105
> > online->offline memory106
> > online->offline memory107
> > online->offline memory108
> > online->offline memory109
> > online->offline memory11
> > online->offline memory110
> > online->offline memory111
> > online->offline memory112
> > online->offline memory113
> > online->offline memory114
> > online->offline memory115
> > online->offline memory116
> > online->offline memory117
> > online->offline memory118
> > online->offline memory119
> > online->offline memory12
> > online->offline memory120
> > online->offline memory121
> > online->offline memory122
> > online->offline memory123
> > online->offline memory124
> 
> Can we have here an output like
> 
> online->offline memory0
> -> Failure
> online->offline memory10
> -> Success
> 
> That would make much more sense for debugging purposes and understanding
> what is happening here. I was primarily concerned about the misleading error
> message, that indicated that something is "unexpected" -- it's perfectly
> reasonable here to *expect* that offlining a random memory blocks just fails.

Yes, I will submit a new version of patches to implement it as your suggestiones:

1.  Redirect misleading msg to /dev/null
2.  Add an output for online->offline test

Thanks!


> 
> --
> Thanks,
> 
> David / dhildenb