[LTP] [PATCH v2] hugetlb: check for requested huge pages first

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> On Wed, Apr 22, 2020 at 7:40 PM Jan Stancek <jstancek@redhat.com> wrote:
> 
> > /sys/kernel/mm/hugepages is not present when there are no
> > supported hugepage sizes. This is common for ppc64le KVM guests,
> > when hypervisor does not enable hugepages. Guest will boot with:
> >   hugetlbfs: disabling because there are no supported hugepage sizes
> >
> >   # cat /proc/filesystems  | grep huge; echo $?
> >   1
> >
> > Move the check up in setup to check it as first thing to avoid
> > running into TBROK on mount or set_sys_tune when hugetlbfs is
> > not available:
> >   safe_macros.c:766: BROK: hugemmap01.c:82: mount(none,
> > /mnt/testarea/ltp-07Kg6lCOmm/Ai9D0M, hugetlbfs, 0, (nil)) failed: ENODEV
> > (19)
> >   safe_macros.c:766: BROK: hugemmap02.c:129: mount(none,
> > /mnt/testarea/ltp-07Kg6lCOmm/Cxf7A6, hugetlbfs, 0, (nil)) failed: ENODEV
> > (19)
> >   safe_macros.c:766: BROK: hugemmap04.c:100: mount(none,
> > /mnt/testarea/ltp-07Kg6lCOmm/kS60Mk, hugetlbfs, 0, (nil)) failed: ENODEV
> > (19)
> >   safe_file_ops.c:219: BROK: Expected 1 conversions got 0 at
> > hugemmap06.c:42
> >   safe_file_ops.c:155: BROK: The FILE '/proc/sys/vm/nr_hugepages' ended
> > prematurely at mem.c:836
> >   safe_file_ops.c:219: BROK: Expected 1 conversions got 0 at
> > hugeshmat05.c:39
> >
> > Signed-off-by: Jan Stancek <jstancek@redhat.com>
> >
> Acked-by: Li Wang <liwang@redhat.com>
> 
> This is obviously right! ACK.

Pushed.