linux-kernel - Re: [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis

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Date:	Mon, 04 Jul 2016 18:08:27 +0800
From:	"Hillf Danton" <hillf.zj@...baba-inc.com>
To:	"Mel Gorman" <mgorman@...hsingularity.net>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [PATCH 04/31] mm, vmscan: begin reclaiming pages on a per-node basis

> @@ -2561,17 +2580,23 @@ static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
>  	 * highmem pages could be pinning lowmem pages storing buffer_heads
>  	 */
>  	orig_mask = sc->gfp_mask;
> -	if (buffer_heads_over_limit)
> +	if (buffer_heads_over_limit) {
>  		sc->gfp_mask |= __GFP_HIGHMEM;
> +		sc->reclaim_idx = classzone_idx = gfp_zone(sc->gfp_mask);
> +	}
> 
We need to push/pop ->reclaim_idx as ->gfp_mask handled?

thanks
Hillf