linux-kernel - [PATCH] net/mlx4_en: allocate non 0-order pages for RX ring with __GFP

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Message-ID: <146097923460.15114.8965134124148581055.stgit@buzz>
Date:	Mon, 18 Apr 2016 14:33:54 +0300
From:	Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:	netdev@...r.kernel.org, Yishai Hadas <yishaih@...lanox.com>,
	Eugenia Emantayev <eugenia@...lanox.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] net/mlx4_en: allocate non 0-order pages for RX ring with
 __GFP_NOMEMALLOC

High order pages are optional here since commit 51151a16a60f ("mlx4: allow
order-0 memory allocations in RX path"), so here is no reason for depleting
reserves. Generic __netdev_alloc_frag() implements the same logic.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
---
 drivers/net/ethernet/mellanox/mlx4/en_rx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 86bcfe510e4e..56d070d9cf01 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -61,7 +61,7 @@ static int mlx4_alloc_pages(struct mlx4_en_priv *priv,
 		gfp_t gfp = _gfp;
 
 		if (order)
-			gfp |= __GFP_COMP | __GFP_NOWARN;
+			gfp |= __GFP_COMP | __GFP_NOWARN | __GFP_NOMEMALLOC;
 		page = alloc_pages(gfp, order);
 		if (likely(page))
 			break;