linux-kernel - Re: [PATCH -next v5 2/4] selftests/memory-hotplug: Restore memory before exit

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Date:   Fri, 30 Sep 2022 08:52:51 +0000
From:   zhaogongyi <zhaogongyi@...wei.com>
To:     David Hildenbrand <david@...hat.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
CC:     "akinobu.mita@...il.com" <akinobu.mita@...il.com>,
        "corbet@....net" <corbet@....net>,
        "osalvador@...e.de" <osalvador@...e.de>,
        "shuah@...nel.org" <shuah@...nel.org>
Subject: Re: [PATCH -next v5 2/4] selftests/memory-hotplug: Restore memory
 before exit

Hi!

> 
> On 30.09.22 08:35, Zhao Gongyi wrote:
> > Some momory will be left in offline state when calling
> > offline_memory_expect_fail() failed. Restore it before exit.
> >
> > Signed-off-by: Zhao Gongyi <zhaogongyi@...wei.com>
> > ---
> >   .../memory-hotplug/mem-on-off-test.sh         | 21
> ++++++++++++++-----
> >   1 file changed, 16 insertions(+), 5 deletions(-)
> >
> > diff --git a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
> b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
> > index 1d87611a7d52..91a7457616bb 100755
> > --- a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
> > +++ b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
> > @@ -134,6 +134,16 @@ offline_memory_expect_fail()
> >   	return 0
> >   }
> >
> > +online_all_offline_memory()
> > +{
> > +	for memory in `hotpluggable_offline_memory`; do
> > +		if ! online_memory_expect_success $memory; then
> > +			echo "$FUNCNAME $memory: unexpected fail" >&2
> 
> Do we need that output?

In my opinion, if online a memory node failed ,it should be a kernel bug catched, so, I think the output here is needed.

Thanks!

Gongyi