Re: BUG: scheduling while atomic: cron/668/0x10c9a0c0 (was: Re: mm, page_alloc: avoid looking up the first zone in a zonelist twice)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, May 30, 2016 at 07:37:39PM +0200, Geert Uytterhoeven wrote:
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.


Thanks. Please try the following instead

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index bb320cde4d6d..557549c81083 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3024,6 +3024,7 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order, int alloc_flags,
 		apply_fair = false;
 		fair_skipped = false;
 		reset_alloc_batches(ac->preferred_zoneref->zone);
+		z = ac->preferred_zoneref;
 		goto zonelist_scan;
 	}
 

-- 
Mel Gorman
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-m68k" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Video for Linux]     [Yosemite News]     [Linux S/390]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux