Hi Mel, On Mon, May 30, 2016 at 5:56 PM, Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> wrote: > On Mon, May 30, 2016 at 03:13:40PM +0200, Geert Uytterhoeven wrote: >> > The benefit is negligible and the results are within the noise but each >> > cycle counts. >> > >> > Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> >> > Cc: Vlastimil Babka <vbabka@xxxxxxx> >> > Cc: Jesper Dangaard Brouer <brouer@xxxxxxxxxx> >> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> >> > Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> >> >> About one week ago, I started seeing an obscure intermittent crash during >> system shutdown on m68k/ARAnyM using atari_defconfig. >> The crash isn't 100% reproducible, but it happens during ca. 1 out of 5 >> shutdowns. >> >> I finally managed to bisect it to the above commit. >> I did verify that the parent commit didn't crash after 60 tries. >> Unfortunately I couldn't revert the offending commit on top of v4.7-rc1, due to >> conflicting changes. >> >> Do you have any idea what's going wrong? > > There isn't anything obvious from the crash log you showed but can you > try the following just in case? > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index dba8cfd0b2d6..f2c1e47adc11 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -3232,6 +3232,9 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order, > * allocations are system rather than user orientated > */ > ac->zonelist = node_zonelist(numa_node_id(), gfp_mask); > + ac->preferred_zoneref = first_zones_zonelist(ac->zonelist, > + ac->high_zoneidx, ac->nodemask); > + ac->classzone_idx = zonelist_zone_idx(ac->preferred_zoneref); > page = get_page_from_freelist(gfp_mask, order, > ALLOC_NO_WATERMARKS, ac); > if (page) Thanks, but unfortunately it doesn't help. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>