From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754288AbbEZNZU (ORCPT ); Tue, 26 May 2015 09:25:20 -0400 Received: from [37.187.137.238] ([37.187.137.238]:55958 "EHLO mail.free-electrons.com" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753607AbbEZNKh (ORCPT ); Tue, 26 May 2015 09:10:37 -0400 From: Maxime Ripard To: Vinod Koul , Gregory Clement , Jason Cooper , Andrew Lunn , Sebastian Hesselbarth Cc: dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lior Amsalem , Thomas Petazzoni , Maxime Ripard Subject: [PATCH v2 4/5] dmaengine: mv_xor: Enlarge descriptor pool size Date: Tue, 26 May 2015 15:07:35 +0200 Message-Id: <1432645656-20504-5-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.4.1 In-Reply-To: <1432645656-20504-1-git-send-email-maxime.ripard@free-electrons.com> References: <1432645656-20504-1-git-send-email-maxime.ripard@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lior Amsalem Now that we have 2 channels assigned to 2 CPUs and all requests are chained on same channels, we need much more descriptors available to satisfy async_tx workload. 3072 descriptors was found in our lab as the number of descriptors which allow the async_tx stack to work without waiting for free descriptors on submission of new requests. Signed-off-by: Lior Amsalem Reviewed-by: Nadav Haklai Tested-by: Nadav Haklai Signed-off-by: Maxime Ripard --- drivers/dma/mv_xor.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h index ac1ce87935de..6b10c8c647b9 100644 --- a/drivers/dma/mv_xor.h +++ b/drivers/dma/mv_xor.h @@ -19,7 +19,7 @@ #include #include -#define MV_XOR_POOL_SIZE PAGE_SIZE +#define MV_XOR_POOL_SIZE (MV_XOR_SLOT_SIZE * 3072) #define MV_XOR_SLOT_SIZE 64 #define MV_XOR_THRESHOLD 1 #define MV_XOR_MAX_CHANNELS 2 -- 2.4.1