From: Heesub Shin <heesub.shin@samsung.com>
To: Andrew Morton <akpm@linux-foundation.org>,
        Seth Jennings <sjennings@variantweb.net>
Cc: Nitin Gupta <ngupta@vflare.org>, Dan Streetman <ddstreet@ieee.org>,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Sunae Seo <sunae.seo@samsung.com>,
        Heesub Shin <heesub.shin@samsung.com>
Subject: [RFC PATCH 9/9] mm/zswap: use highmem pages for compressed pool
Date: Tue, 14 Oct 2014 20:59:28 +0900
Message-id: <1413287968-13940-10-git-send-email-heesub.shin@samsung.com>
In-reply-to: <1413287968-13940-1-git-send-email-heesub.shin@samsung.com>
References: <1413287968-13940-1-git-send-email-heesub.shin@samsung.com>
DLP-Filter: Pass
Sender: linux-kernel-owner@vger.kernel.org

Now that the zbud supports highmem, storing compressed anonymous pages
on highmem looks more reasonble. So, pass __GFP_HIGHMEM flag to zpool
when zswap allocates memory from it.

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>
---
 mm/zswap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/zswap.c b/mm/zswap.c
index ea064c1..eaabe95 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -684,8 +684,8 @@ static int zswap_frontswap_store(unsigned type, pgoff_t offset,
 
 	/* store */
 	len = dlen + sizeof(struct zswap_header);
-	ret = zpool_malloc(zswap_pool, len, __GFP_NORETRY | __GFP_NOWARN,
-		&handle);
+	ret = zpool_malloc(zswap_pool, len,
+			__GFP_NORETRY | __GFP_NOWARN | __GFP_HIGHMEM, &handle);
 	if (ret == -ENOSPC) {
 		zswap_reject_compress_poor++;
 		goto freepage;
-- 
1.9.1

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