linux-kernel - [PATCH net] octeontx2-pf: Set page pool size

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Message-ID: <20230810024422.1781312-1-rkannoth@marvell.com>
Date:   Thu, 10 Aug 2023 08:14:22 +0530
From:   Ratheesh Kannoth <rkannoth@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <sgoutham@...vell.com>, <lcherian@...vell.com>,
        <gakula@...vell.com>, <jerinj@...vell.com>, <hkelam@...vell.com>,
        <sbhatta@...vell.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        Ratheesh Kannoth <rkannoth@...vell.com>,
        "Alexander Lobakin" <aleksander.lobakin@...el.com>
Subject: [PATCH net] octeontx2-pf: Set page pool size

page pool infra does direct recycling aggressively.
This would often keep ptr_ring left unused. Save
memory by configuring ptr_ring to a constant value(2K).

Please find discussion at
https://lore.kernel.org/netdev/
	15d32b22-22b0-64e3-a49e-88d780c24616@...nel.org/T/

Fixes: b2e3406a38f0 ("octeontx2-pf: Add support for page pool")
Suggested-by: Alexander Lobakin <aleksander.lobakin@...el.com>
Signed-off-by: Ratheesh Kannoth <rkannoth@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 77c8f650f7ac..123348a9e19e 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -1432,7 +1432,8 @@ int otx2_pool_init(struct otx2_nic *pfvf, u16 pool_id,
 	}
 
 	pp_params.flags = PP_FLAG_PAGE_FRAG | PP_FLAG_DMA_MAP;
-	pp_params.pool_size = numptrs;
+#define OTX2_PAGE_POOL_SZ 2048
+	pp_params.pool_size = OTX2_PAGE_POOL_SZ;
 	pp_params.nid = NUMA_NO_NODE;
 	pp_params.dev = pfvf->dev;
 	pp_params.dma_dir = DMA_FROM_DEVICE;
-- 
2.25.1