> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -3191,8 +3191,23 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
> */
> if (__zone_watermark_ok(zone, order, min_wmark_pages(zone),
> ac->high_zoneidx, alloc_flags, target)) {
> - /* Wait for some write requests to complete then retry */
> - wait_iff_congested(zone, BLK_RW_ASYNC, HZ/50);
> + unsigned long writeback = zone_page_state(zone, NR_WRITEBACK),
> + dirty = zone_page_state(zone, NR_FILE_DIRTY);
> +
> + if (did_some_progress)
> + goto retry;
> +
> + /*
> + * If we didn't make any progress and have a lot of
> + * dirty + writeback pages then we should wait for
> + * an IO to complete to slow down the reclaim and
> + * prevent from pre mature OOM
> + */
> + if (2*(writeback + dirty) > reclaimable)
> + congestion_wait(BLK_RW_ASYNC, HZ/10);
> + else
> + cond_resched();
> +
Looks the vmstat updater issue is not addressed.
> goto retry;
> }
> }
> --
> 2.6.1
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