Hi Jonsoo,

On Mon, Jun 13, 2016 at 9:43 PM, Geert Uytterhoeven
[off-list ref] wrote:

On Tue, Apr 12, 2016 at 6:51 AM,  [off-list ref] wrote:

quoted

From: Joonsoo Kim <redacted>
To check whther free objects exist or not precisely, we need to grab a
lock.  But, accuracy isn't that important because race window would be
even small and if there is too much free object, cache reaper would reap
it.  So, this patch makes the check for free object exisistence not to
hold a lock.  This will reduce lock contention in heavily allocation case.

quoted

Signed-off-by: Joonsoo Kim <redacted>

I've bisected a boot failure (no output at all) in v4.7-rc2 on emev2/kzm9d
(Renesas dual Cortex A9) to this patch, which is upstream commit
801faf0db8947e01877920e848a4d338dd7a99e7.

BTW, when disabling SMP, the problem goes away.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds