linux-kernel - [RFC PATCH v3 6/9] mm/vmpressure: update usage of zone modifiers

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Date:   Wed, 23 May 2018 22:57:51 +0800
From:   Huaisheng Ye <yehs2007@....com>
To:     akpm@...ux-foundation.org, linux-mm@...ck.org
Cc:     mhocko@...e.com, willy@...radead.org, hch@....de, vbabka@...e.cz,
        mgorman@...hsingularity.net, kstewart@...uxfoundation.org,
        gregkh@...uxfoundation.org, colyli@...e.de, chengnt@...ovo.com,
        hehy1@...ovo.com, linux-kernel@...r.kernel.org,
        iommu@...ts.linux-foundation.org, xen-devel@...ts.xenproject.org,
        linux-btrfs@...r.kernel.org, Huaisheng Ye <yehs1@...ovo.com>,
        zhongjiang <zhongjiang@...wei.com>,
        Minchan Kim <minchan@...nel.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        David Rientjes <rientjes@...gle.com>,
        Christoph Hellwig <hch@...radead.org>
Subject: [RFC PATCH v3 6/9] mm/vmpressure: update usage of zone modifiers

From: Huaisheng Ye <yehs1@...ovo.com>

Use __GFP_ZONE_MOVABLE to replace (__GFP_HIGHMEM | __GFP_MOVABLE).

___GFP_DMA, ___GFP_HIGHMEM and ___GFP_DMA32 have been deleted from GFP
bitmasks, the bottom three bits of GFP mask is reserved for storing
encoded zone number.

__GFP_ZONE_MOVABLE contains encoded ZONE_MOVABLE and __GFP_MOVABLE flag.

With GFP_ZONE_TABLE, __GFP_HIGHMEM ORing __GFP_MOVABLE means gfp_zone
should return ZONE_MOVABLE. In order to keep that compatible with
GFP_ZONE_TABLE, replace (__GFP_HIGHMEM | __GFP_MOVABLE) with
__GFP_ZONE_MOVABLE.

Signed-off-by: Huaisheng Ye <yehs1@...ovo.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: zhongjiang <zhongjiang@...wei.com>
Cc: Minchan Kim <minchan@...nel.org>
Cc: Dan Carpenter <dan.carpenter@...cle.com>
Cc: David Rientjes <rientjes@...gle.com>
Cc: Christoph Hellwig <hch@...radead.org>
---
 mm/vmpressure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 85350ce..30a40e2 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -256,7 +256,7 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
 	 * Indirect reclaim (kswapd) sets sc->gfp_mask to GFP_KERNEL, so
 	 * we account it too.
 	 */
-	if (!(gfp & (__GFP_HIGHMEM | __GFP_MOVABLE | __GFP_IO | __GFP_FS)))
+	if (!(gfp & (__GFP_ZONE_MOVABLE | __GFP_IO | __GFP_FS)))
 		return;
 
 	/*
-- 
1.8.3.1