linux-kernel - [RFC PATCH 9/9] mm/zswap: use highmem pages for compressed pool

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Date:	Tue, 14 Oct 2014 20:59:28 +0900
From:	Heesub Shin <heesub.shin@...sung.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Seth Jennings <sjennings@...iantweb.net>
Cc:	Nitin Gupta <ngupta@...are.org>, Dan Streetman <ddstreet@...e.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Sunae Seo <sunae.seo@...sung.com>,
	Heesub Shin <heesub.shin@...sung.com>
Subject: [RFC PATCH 9/9] mm/zswap: use highmem pages for compressed pool

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@...sung.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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