linux-kernel - Re: [PATCH 5/6] selftests/mm: Rename COW_EXTRA_LIBS to IOURING_EXTRA

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Date:   Fri, 14 Apr 2023 09:56:07 -0400
From:   Peter Xu <peterx@...hat.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH 5/6] selftests/mm: Rename COW_EXTRA_LIBS to
 IOURING_EXTRA_LIBS

On Fri, Apr 14, 2023 at 11:52:40AM +0200, David Hildenbrand wrote:
> On 14.04.23 01:11, Peter Xu wrote:
> > The macro and facility can be reused in other tests too.  Make it general.
> > 
> > Signed-off-by: Peter Xu <peterx@...hat.com>
> > ---
> >   tools/testing/selftests/mm/Makefile        | 8 ++++----
> >   tools/testing/selftests/mm/check_config.sh | 4 ++--
> >   2 files changed, 6 insertions(+), 6 deletions(-)
> > 
> > diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile
> > index 5a3434419403..9ffce175d5e6 100644
> > --- a/tools/testing/selftests/mm/Makefile
> > +++ b/tools/testing/selftests/mm/Makefile
> > @@ -161,8 +161,8 @@ warn_32bit_failure:
> >   endif
> >   endif
> > -# cow_EXTRA_LIBS may get set in local_config.mk, or it may be left empty.
> > -$(OUTPUT)/cow: LDLIBS += $(COW_EXTRA_LIBS)
> > +# IOURING_EXTRA_LIBS may get set in local_config.mk, or it may be left empty.
> > +$(OUTPUT)/cow: LDLIBS += $(IOURING_EXTRA_LIBS)
> >   $(OUTPUT)/mlock-random-test $(OUTPUT)/memfd_secret: LDLIBS += -lcap
> > @@ -175,11 +175,11 @@ local_config.mk local_config.h: check_config.sh
> >   EXTRA_CLEAN += local_config.mk local_config.h
> > -ifeq ($(COW_EXTRA_LIBS),)
> > +ifeq ($(IOURING_EXTRA_LIBS),)
> >   all: warn_missing_liburing
> >   warn_missing_liburing:
> >   	@echo ; \
> > -	echo "Warning: missing liburing support. Some COW tests will be skipped." ; \
> > +	echo "Warning: missing liburing support. Some tests will be skipped." ; \
> >   	echo
> >   endif
> > diff --git a/tools/testing/selftests/mm/check_config.sh b/tools/testing/selftests/mm/check_config.sh
> > index bcba3af0acea..3954f4746161 100644
> > --- a/tools/testing/selftests/mm/check_config.sh
> > +++ b/tools/testing/selftests/mm/check_config.sh
> > @@ -21,11 +21,11 @@ $CC -c $tmpfile_c -o $tmpfile_o >/dev/null 2>&1
> >   if [ -f $tmpfile_o ]; then
> >       echo "#define LOCAL_CONFIG_HAVE_LIBURING 1"  > $OUTPUT_H_FILE
> > -    echo "COW_EXTRA_LIBS = -luring"              > $OUTPUT_MKFILE
> > +    echo "IOURING_EXTRA_LIBS = -luring"          > $OUTPUT_MKFILE
> >   else
> >       echo "// No liburing support found"          > $OUTPUT_H_FILE
> >       echo "# No liburing support found, so:"      > $OUTPUT_MKFILE
> > -    echo "COW_EXTRA_LIBS = "                    >> $OUTPUT_MKFILE
> > +    echo "IOURING_EXTRA_LIBS = "                >> $OUTPUT_MKFILE
> >   fi
> >   rm ${tmpname}.*
> 
> Reviewed-by: David Hildenbrand <david@...hat.com>

Oops, I planned to drop this patch but I forgot.. I was planning to use
iouring but only later found that it cannot take RO pins so switched to
gup_test per your cow test.  Hence this patch is not needed anymore.

But since it's already there and looks like still good to have.. let me
keep it around with your R-b then.

Thanks,

-- 
Peter Xu