Re: [PATCH 3/5] lib/bitmap: add test for bitmap_{from,to}_arr64

[Yury Norov]

On Thu, May 19, 2022 at 8:09 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>
> On Thu, Apr 28, 2022 at 01:51:14PM -0700, Yury Norov wrote:
> > Test newly added bitmap_{from,to}_arr64() functions similarly to
> > already existing bitmap_{from,to}_arr32() tests.
> >
> > Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
>
> With this patch in linux-next (including next-20220519), I see lots of
> bitmap test errors when booting 32-bit ppc images in qemu. Examples:
>
> test_bitmap: [lib/test_bitmap.c:600] bitmaps contents differ: expected "0", got "0,65"
> ...
> test_bitmap: [lib/test_bitmap.c:600] bitmaps contents differ: expected "0,65", got "0,65,128"
> test_bitmap: [lib/test_bitmap.c:600] bitmaps contents differ: expected "0,65", got "0,65,128-129"
> test_bitmap: [lib/test_bitmap.c:600] bitmaps contents differ: expected "0,65", got "0,65,128-130"
> ...
> test_bitmap: [lib/test_bitmap.c:600] bitmaps contents differ: expected "0,65,128-143", got "0,65,128-143,208-209"
> test_bitmap: [lib/test_bitmap.c:600] bitmaps contents differ: expected "0,65,128-143", got "0,65,128-143,208-210"
>
> and so on. It only  gets worse from there, and ends with:
>
> test_bitmap: parselist: 14: input is '0-2047:128/256' OK, Time: 4274
> test_bitmap: bitmap_print_to_pagebuf: input is '0-32767
> ', Time: 127267
> test_bitmap: failed 337 out of 3801 tests
>
> Other architectures and 64-bit ppc builds seem to be fine.

Hi Guenter,

Thanks for letting me know. It's really weird because it has already
been for 2 weeks
in next with no issues. But I tested it on mips32, not powerpc. I'll
check what happens
there.

Can you please share your config and qemu image if possible?

Thanks,
Yury