Re: [PATCH 29/30] tools/testing/vma: default VMA flag bits to 64-bit

On Thu, Jul 02, 2026 at 12:44:21PM +0100, Pedro Falcato wrote:
> On Mon, Jun 29, 2026 at 01:23:40PM +0100, Lorenzo Stoakes wrote:
> > With all of the sanitisers turned on, setting the VMA flag bits depth to
> > 128 by default results in overly long build times.
> >
> > Reduce this to 64 - we can always manipulate these later for testing of
> > larger bitmaps as needed.
> >
>
> Hmm, what's the problem with the sanitizers? Shouldn't this just result in
> slightly different codegen?

I'm not sure but it results in vastly longer build times. It was a fun idea but
it partly defeats the point of the VMA userland tests.

Rather than spend too long investigating I'd rather we move to a sane default.

>
> > Signed-off-by: Lorenzo Stoakes <[email protected]>
> > ---
> >  tools/testing/vma/Makefile | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/tools/testing/vma/Makefile b/tools/testing/vma/Makefile
> > index e72b45dedda5..ef6cc558afe1 100644
> > --- a/tools/testing/vma/Makefile
> > +++ b/tools/testing/vma/Makefile
> > @@ -10,7 +10,7 @@ OFILES = $(SHARED_OFILES) main.o shared.o maple-shim.o
> >  TARGETS = vma
> >
> >  # These can be varied to test different sizes.
> > -CFLAGS += -DNUM_VMA_FLAG_BITS=128 -DNUM_MM_FLAG_BITS=128
> > +CFLAGS += -DNUM_VMA_FLAG_BITS=64 -DNUM_MM_FLAG_BITS=64
> >
> >  main.o: main.c shared.c shared.h vma_internal.h tests/merge.c tests/mmap.c tests/vma.c ../../../mm/vma.c ../../../mm/vma_init.c ../../../mm/vma_exec.c ../../../mm/vma.h include/custom.h include/dup.h include/stubs.h
> >
> > --
> > 2.54.0
> >
>
> --
> Pedro

Thanks, Lorenzo