linux-kernel - [RFC PATCH v2 09/12] mm/vmpressure: update usage of address zone modifiers

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Date:   Mon, 21 May 2018 18:06:48 +0000
From:   Huaisheng HS1 Ye <yehs1@...ovo.com>
To:     "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "willy@...radead.org" <willy@...radead.org>
CC:     "mhocko@...e.com" <mhocko@...e.com>,
        "vbabka@...e.cz" <vbabka@...e.cz>,
        "mgorman@...hsingularity.net" <mgorman@...hsingularity.net>,
        "kstewart@...uxfoundation.org" <kstewart@...uxfoundation.org>,
        "alexander.levin@...izon.com" <alexander.levin@...izon.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "colyli@...e.de" <colyli@...e.de>,
        NingTing Cheng <chengnt@...ovo.com>,
        Ocean HY1 He <hehy1@...ovo.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>,
        "hch@....de" <hch@....de>,
        "zhongjiang@...wei.com" <zhongjiang@...wei.com>,
        "minchan@...nel.org" <minchan@...nel.org>,
        "dan.carpenter@...cle.com" <dan.carpenter@...cle.com>,
        "rientjes@...gle.com" <rientjes@...gle.com>
Subject: [RFC PATCH v2 09/12] mm/vmpressure: update usage of address zone
 modifiers

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>
---
 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