From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 06D4BC433F5 for ; Mon, 13 Dec 2021 09:24:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Content-ID:In-Reply-To: References:Message-ID:Date:Subject:To:From:Reply-To:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=0j2jzmpGwR+X5kmqo9oW2t0H8CKco2eaK7Iy9KVSFtY=; b=CW2jA1xWtZqfcH Ws7w6uEwwq1hn2zspxwNaAzLIu2Eb/+HyctwO5h3Mjyfbns6QkVJBfDjIfTH2/pgTSUrgoBN5ULb3 gj2UiYE456sZjw6rGWEnCl/jsI/AKcgVuYdmWcHt6ypaY+iL0T2lzMYjd7zv+zbJwp4t9Vcw94b/y 46VCaNacbS6HU9gPboK5exhDIQvmL4ASyK4791HWkKDDJIshpLhFFMz4fiGDY1WNRSt1s+pBewUZy +O45gewppknykz9LNq3Z6y6iPQFBw1lBSY6kNLcsHqYDrQeXZSGIdA1KcoI818qtyP0qJlqOpLJn4 kMehCQwyXGDbBQGS4VUA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mwhXG-008bNQ-O2; Mon, 13 Dec 2021 09:22:19 +0000 Received: from esa.microchip.iphmx.com ([68.232.153.233]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mwhX7-008bKv-Me for linux-arm-kernel@lists.infradead.org; Mon, 13 Dec 2021 09:22:11 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1639387329; x=1670923329; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=s/WDQ+OCl8p/i48v0fXb0T89rFUao1gPkiVYca/6sms=; b=yitThPi5W8GJSUC33Hbb3bzwjg5WgVr9S61JEk953sGgXDkEshmgO3u3 g1TYEj9hvWxjIV9DVrsEN64RCdVS0uLHPWIHqVQ8GKHxkhDgh5yIlBI7a udVlm5U3YJKsw4GazNyZwhoTmEECMwu2jzAzKZSPv6SyPJCoFn9P7VAjh qxpBvK78A7AYztORhM7jbasNmAWW2+JzhlFdi2t9ZymeAzUlBjOgZUXct +MXMyDTHWJll0lM+kRVoNIuLYEc9mww9PD2PMAkPdeAkWQehr4bn7HY5I 1CcxKU2JEHhuUJGHSVUvh6BkrKqlOD+d0laD8G9iGPVYTkM68qtehZ4WI Q==; IronPort-SDR: zZsawRMhc21D8m3zFXcVnhbDcTkdLJ6FMwtKhxtk3Kqofxob0GC9H9ii27nSa9CZzq88F1Pvhz fbVkP6Gj9nSaqhlFD4iZ6+B0WuENf3wHpN9xBNpYbJEW/+cIRigtzqD930EDJfVV9jAurL0TSg loM7pA82m6a5rAArrb+uCarYEah6+rpL9T6E8di8byaI2b+DwKr3yKwYH9Ppn1YFRzxtnOLHky gy5LoqXtFrzoGtq29n06TwT14uLufc+5R+I1fSEXY+sCxTLz9e3m8+h2HWjwMOfu8zC85288Ge Bw/cSg4iZG682mnYkWzsS7OS X-IronPort-AV: E=Sophos;i="5.88,202,1635231600"; d="scan'208";a="155246214" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 13 Dec 2021 02:22:07 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Mon, 13 Dec 2021 02:22:06 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (10.10.215.89) by email.microchip.com (10.10.87.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17 via Frontend Transport; Mon, 13 Dec 2021 02:22:06 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nXCXNcSayUwK2lP8IquvsfQJSglg24Zbe6OhY4Xabgj3GkVhEaRUazHec6pYm45kLYLNmFlk7OZ9yaSxpkF3paOegdMLgwAlg89HYbqjNEbE/t9gK6kINaXH5uky1W4dS4q1uHeYDjT6+72uYg3yk2MMr27zA9OkGr5dHPaI/n3aAaYUAXwFYkIvaY9BusREEpoY8CPgn2KSUuLHQFDK7/gJbL0eyB0mJQooefuEku/Kq2Zv/60X2PUea4G0fFrM+tnhluSZB6y7yj19dyPj2/QuFotTalINiN7lUJTFI1U3r1rCi25xVRw0Dn/CqIW/kurTvpHPfQV//xF7lOU+Gg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=s/WDQ+OCl8p/i48v0fXb0T89rFUao1gPkiVYca/6sms=; b=Hd1jRFK7sCQy/XqqWYQDZ8VooeDN0dlEieM7KomtdpXu1E8oU7MWTO07elX3SlvSqoqA/eNuWViseLZbKal60A+6VMxjSS8SVzngcM/zbxtNP7tNkHcNgpIet/wCAGigBWjclGgEUdV0q7cYG4N3MIsGOYthx8Xj5pYrZJGsBmVFPVaBpO5wwJi5sF8A6djgoxtCBMYYksJ3pMN4vcDTx9EYOykN9Hpr9oQfKybvk8C4nB4/Gh1Hc7phA/BbRIrp3iinlNVkJ6a/IJf96qbqWpHokREhuhDYqgnyJwL/tWBd1dBozBHIaWwJeRa4PbeA5CyRxswVU3fbA41BoeCzBQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=microchip.com; dmarc=pass action=none header.from=microchip.com; dkim=pass header.d=microchip.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microchiptechnology.onmicrosoft.com; s=selector2-microchiptechnology-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=s/WDQ+OCl8p/i48v0fXb0T89rFUao1gPkiVYca/6sms=; b=uWUj3TflMnbB5OpNZDrAWMpNZnadmhtiBHVHoXVaWQR08FqqQDpK4GFzvcTfVVKvwe4DaB9do/oYC9oKPt+r/ypYbtsF8SJlpnWFJJkbCoAvziNagWUrNXEzwxzr9PIX1V3ZbdYpgGKI2msHZnTCVT51q4HEfw2j8F1skMUXUjg= Received: from SA2PR11MB4874.namprd11.prod.outlook.com (2603:10b6:806:f9::23) by SN6PR11MB3533.namprd11.prod.outlook.com (2603:10b6:805:cc::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4778.12; Mon, 13 Dec 2021 09:22:02 +0000 Received: from SA2PR11MB4874.namprd11.prod.outlook.com ([fe80::5c96:23c3:4407:d3b1]) by SA2PR11MB4874.namprd11.prod.outlook.com ([fe80::5c96:23c3:4407:d3b1%9]) with mapi id 15.20.4778.017; Mon, 13 Dec 2021 09:22:02 +0000 From: To: Subject: Re: [PATCH v2 08/13] dmaengine: at_xdmac: Move the free desc to the tail of the desc list Thread-Topic: [PATCH v2 08/13] dmaengine: at_xdmac: Move the free desc to the tail of the desc list Thread-Index: AQHX7/6cGW4RS1ZeJkC0M7VpsR3jOA== Date: Mon, 13 Dec 2021 09:22:01 +0000 Message-ID: <3d57524a-6d88-3027-d8fb-94417ae0b4f6@microchip.com> References: <20211125090028.786832-1-tudor.ambarus@microchip.com> <20211125090028.786832-9-tudor.ambarus@microchip.com> <8523ca32-d36f-6e0b-0115-5e07553396f1@microchip.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=microchip.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2bb157ea-82c2-4f1b-99dc-08d9be1a0581 x-ms-traffictypediagnostic: SN6PR11MB3533:EE_ x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8273; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SA2PR11MB4874.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(366004)(91956017)(66556008)(6512007)(66476007)(2616005)(6486002)(66946007)(76116006)(6916009)(71200400001)(8936002)(31696002)(316002)(66446008)(36756003)(2906002)(64756008)(83380400001)(38070700005)(4326008)(26005)(54906003)(186003)(86362001)(508600001)(122000001)(38100700002)(6506007)(7416002)(31686004)(8676002)(5660300002)(53546011)(45980500001)(43740500002); DIR:OUT; SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?SE9OZmJlbWsxU3R1ZzB6bTZYdklDNDVDdWtrNGRWWStyRWJQVzVlTzk2cjVF?= =?utf-8?B?aUhhVDJFMVFkZHRWM2lTRWE1Qnc0UElNK3JuSU9ZeDl0eUxLY2xqQXRFWkV2?= =?utf-8?B?bGNXYzU4d25tT1ZURStTS3VDU005QlZlWXdhVm9LNGxZTzdrOGVRS3hzTlZ4?= =?utf-8?B?Z09VNUhEVzduL2FTQjRCNmRKKzlJT0V2UmpCSzNhMWZmY2lEZnVxdVNRb2k3?= =?utf-8?B?MEtXTFI1U0hrOS95NXBNQ3BPOVhKVUhRVGNGQnNmcHBYNEN1eGszaW5OUlNm?= =?utf-8?B?aTUwK3VOdWxvdEJteCtFZUEyVXAxYzF2N3ZOakw3b0g3dmFqbXoyNFY3RE4y?= =?utf-8?B?all0eHJtZGZEaGxZMTA1SVBraWRYNW9XWHlMQ3RGV0RQUkl5TG1Ha05vSit4?= =?utf-8?B?Y1NHS0Q5WDEwUC9IZ2t5cVA1WUtGYk0zTnFFbFhFaURCVmxtSXRLRTBRL0xK?= =?utf-8?B?eCtnRTBHMjN4UnJ2eVh1c01EeERsLzB3SlM1Szh2aUlIcG44ektnSTRHTVhn?= =?utf-8?B?ZnJ0TEdWSlU0WmVYbFNCVVpwaXBvRXFmZTkwQXdYU3BBTEdyR1d2QTdvUlNI?= =?utf-8?B?bGpsRXA1U0E2WE9jMFVESGtuWCtVaWJDVi9kdEU2a0tlSTJRVm1EM0pCUS9C?= =?utf-8?B?eTAzMWhZWWNyR2VMdEx6QmIxUTkxdC80c2lQUGwzVXo4VkYrTXRZcjU0OE5L?= =?utf-8?B?a1FaK3kyUTA0MDlDZmdRdUY2elVXbGpFZHQ3aWo5SUFEMWI3YVE2VS9UcHVo?= =?utf-8?B?ZklybERRUDdLTmdyNzlVWi8rVXNudDI2Q0t1cHBCWlJ0R1QvOVZkNDRBK0dG?= =?utf-8?B?Qm5UdklQTnduaEIvVWJJYVBXQzdkS3hCU1Vud3Q3d0xQczlYYUFOdzBSMUZj?= =?utf-8?B?N0lLd3FublNKT3ZFamtCT3lSYTlqRXNCdE0wMFo4YTlVYjJvY3B6QURENmZT?= =?utf-8?B?enNoZHJycy83K1hRV1l0S1BQWlZqY1BCTGVvNm50ZmtFejVncUQ2cndvTExB?= =?utf-8?B?RWxlU0x5YmRpaEx5cURyNFlwNm9lQkRNUXkzOFUxcDhoMk43R3ZxWitUVVpV?= =?utf-8?B?bmJDS3BFa1NzMkY3b2doQkpaekw4T2ovWkJETTNGSG1aVnppc1RtVEd0VCsw?= =?utf-8?B?ejhQSU5HMHQzS1lEMjZDdnA5WHlDdUxBS1JWc1N0WVczMzNpbW1obVduS1Ny?= =?utf-8?B?VDVnUDJtaVpjbm1YYjFwdmhRaHJTMVNiZEt5THhBSFI3T2NOVTVWR0h0VENM?= =?utf-8?B?NFJkMEFMOGdJbW9rZzg2Z1BxVlNhejdiYkxCTkw4UXYrUmxaSXVQVDA2QVRu?= =?utf-8?B?MjZuek1xd0pNczhWU2M5WjAweERNS1B0cmFuR1J2czFaNEp1RVU4QjVmS3k1?= =?utf-8?B?UXN5M0I1SytrbWJtVjFVRHZ3NDhTczV6WThQdFA2Vk8vUG1JT1JpS01qT2cy?= =?utf-8?B?aDZLWHJ0OW9CajVWTSt5QXRFODhNMWZQNU0rMjZyV2xYT3llYmhWZExtQUhF?= =?utf-8?B?RFJFWkkvQmJlS3lyVWJ6ZW42ZDVjWU5FK2Vlemp2MGI2aEYvTXg5amR3eEhB?= =?utf-8?B?MGVqOFozY3RzOEZZV2VmSXZqVi9sTUNnc0hlVnNDREFROC9zV0tlOVgwS3hi?= =?utf-8?B?bFVtWXdjNXJFUU1qcFM0Ry9WdFMyNHQrNExBdkowRHl2NlJKZkZvYUxmcG9T?= =?utf-8?B?YTkySDdnMzFpSVBWQWdsTzB5STU0a294N05CTFVVaWJDUGVxU0RJbXBzU0xh?= =?utf-8?B?RDA5TGNINTFocndMVVc3akpFNkZoUUU0YUtiUDBWM1krLzR5WlpJWGIrREFq?= =?utf-8?B?K2RLdzhhRnNqWHc4bEplK0huVGJvNExnT3I1TFlhdytvakk5ZUV4a1YxZmNO?= =?utf-8?B?TzY5b1ZaN1dLMjNwT0s5Qitma2ZYQTJWcFRJV1BqOFlzOWJTMmtRQlkrcDJh?= =?utf-8?B?T3JVa0dOTjQzK2l4NFBiaHJSNEFVOStKR2JHVFlhVUhlSDdmL2htUkhNMEhQ?= =?utf-8?B?VzdTT1hBRGt2eE90aThheG9MYjArb2dBNkdmbVZvYjdGbncxVHphVEtkTG10?= =?utf-8?B?TTQvOU04eU10Y0d2YVRteUFLVk9qQTk0ZHh2VnRsSGVhTEQvd2lBdDlhMzRt?= =?utf-8?B?QjY2VGpRaERmelJGSnZvN1hiTFh2eFZxcFV4dzR3YjYwazV5YnloM09aWmwr?= =?utf-8?B?N2pMZUFKZEpuZFJFZWpadElpMUVRWm1xTnEwc0VsdVdVb1krcit2dERsNjcw?= =?utf-8?B?V04vQnpIWXJjeU41VGxBWXJTZ0N3PT0=?= Content-ID: MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SA2PR11MB4874.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2bb157ea-82c2-4f1b-99dc-08d9be1a0581 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Dec 2021 09:22:01.9247 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 7gLKOmBV9B7gDjCPI7pIv+sFTgfeWDWFZYxx2aHpPNQ39YCYf1xFavP4sBnmezccS1dVmZkYs6AljwpKnQWcwxrJU5m3nfqEznediUPM+QE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB3533 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211213_012209_792278_2E4C2AA8 X-CRM114-Status: GOOD ( 17.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexandre.belloni@bootlin.com, richard.genoud@gmail.com, gregkh@linuxfoundation.org, mripard@kernel.org, linux-kernel@vger.kernel.org, Ludovic.Desroches@microchip.com, linux-serial@vger.kernel.org, dmaengine@vger.kernel.org, jirislaby@kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 12/13/21 11:00 AM, Vinod Koul wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On 13-12-21, 14:29, Vinod Koul wrote: >> On 13-12-21, 08:51, Tudor.Ambarus@microchip.com wrote: >>> Hi, Vinod, >>> >>> On 12/13/21 10:07 AM, Vinod Koul wrote: >>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe >>>> >>>> On 25-11-21, 11:00, Tudor Ambarus wrote: >>>>> So that we don't use the same desc over and over again. >>>> >>>> Please use full para in the changelog and not a continuation of the >>>> patch title! >>> >>> Ok, will add a better commit description. Here and in other patches where >>> your comment applies. >> >> Great! >> >>>> >>>> and why is wrong with using same desc over and over? Any benefits of not >>>> doing so? >>> >>> Not wrong, but if we move the free desc to the tail of the list, then the >>> sequence of descriptors is more track-able in case of debug. You would >>> know which descriptor should come next and you could easier catch >>> concurrency over descriptors for example. I saw virt-dma uses >>> list_splice_tail_init() as well, I found it a good idea, so I thought to >>> follow the core driver. >> >> Okay, I would be good to add this motivation in the change log. I am >> sure after few you would also wonder why you did this change :) Sure. > > Also, pls submit serial patches to Greg separately. I guess he saw the > title and overlooked those... I received a private message from Greg informing me that he applied the patches to tty-next and that they will be merged during the merge window. So I'll drop the tty patches in v3. Cheers, ta _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel