Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 18 Aug 2022 10:06:48 +0800
From:   Oliver Sang <oliver.sang@intel.com>
To:     John Garry <john.garry@huawei.com>
CC:     Damien Le Moal <damien.lemoal@opensource.wdc.com>,
        Christoph Hellwig <hch@lst.de>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux Memory Management List <linux-mm@kvack.org>,
        <linux-ide@vger.kernel.org>, <lkp@lists.01.org>, <lkp@intel.com>,
        <ying.huang@intel.com>, <feng.tang@intel.com>,
        <zhengjun.xing@linux.intel.com>, <fengwei.yin@intel.com>
Subject: Re: [ata] 0568e61225: stress-ng.copy-file.ops_per_sec -15.0%
 regression
Message-ID: <Yv2euLFLjl8bEaeI@xsang-OptiPlex-9020>
References: <e4106ffa-3842-45c0-9756-5226cfcfa17d@opensource.wdc.com>
 <YvXeuCAK780OuJPz@xsang-OptiPlex-9020>
 <2e9cf5a6-c043-5ccf-e363-097c6c941891@huawei.com>
 <f1c3d717-339d-ba2b-9775-fc0e00f57ae3@huawei.com>
 <Yvs/w93KUkgD9f7/@xsang-OptiPlex-9020>
 <aabf7ed8-8d4d-dc68-1b8b-c91653701def@huawei.com>
 <43eaa104-5b09-072c-56aa-6289569b0015@opensource.wdc.com>
 <28d6e48b-f52f-9467-8260-262504a1a1ff@huawei.com>
 <YvzyZJUblfqN6Xj3@xsang-OptiPlex-9020>
 <743867a6-b266-58e4-a8a6-542757916f0a@huawei.com>
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <743867a6-b266-58e4-a8a6-542757916f0a@huawei.com>
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?17O2OJJEDVQ/dDQU6/kWtSLRnzSo7QdzIY3C1bRFdiKsLMMojeJraX+y5Sz4?=
 =?us-ascii?Q?sWGnhYkAbvkc5SB3zsL9bkKLi5aBlyePnXRNvXL+CBtw0FPZlbeC9MoQ70+X?=
 =?us-ascii?Q?GfcYg/92aNhGtwT3iQVYSx/NwPaJ9bwuO3rtI8N5PqNx+4doK40j+YJn73P+?=
 =?us-ascii?Q?qZ/KIhcnC3nmd0Zt/WwhJsZmUjBg96tmK5Tz5hi5A96fivakhPaKzs69F7cH?=
 =?us-ascii?Q?VGs0MH/5J1a8C2C6Og63OGtnae0DiOvt4P2Nz42dxGPPGsmHCNqElXTYeg8x?=
 =?us-ascii?Q?rmFY4KXGG937mXsYKlq588gQOnGXd1/ZncOTCkXYt1zDIbhRAThBRez929Oj?=
 =?us-ascii?Q?5rN9OcQJvD7JXxdCTZlyUxC9xu9vERdeNDGJdFZksUF0u7KGNawUtLjUDimf?=
 =?us-ascii?Q?KFx+trUYbzVfkFk7FpIflM0hMqnyUpejq79DQbwtAq0jsFpCOeGsA6dEXD5f?=
 =?us-ascii?Q?AdItdHD5HLEOHdVx5sEBJaxdFnFIr4xZxz+lsxkiKLqlP9uUx0KXoxBEA6xD?=
 =?us-ascii?Q?rnLpFFbckaXGXTvTGqlEUOTF92LAxzqlsx5vTFPy52Mh0Bo1sOIr6uqqXZlh?=
 =?us-ascii?Q?LYHvYUoFbmCG+InrMjtQhpb+l8jYJHgPfHrjzLKqGVl9GTLxiIKXYKRlt+Pl?=
 =?us-ascii?Q?yjBxEXS1cB4MxUQIzbMq82TI1WXIqxEoFZ3cBuf2pm/yNCwyHPa7JaxPnCTV?=
 =?us-ascii?Q?FhR1QRj5jicxdPMMQ9ZC9JncD1k90okXg7ahh8UUfAT+aBn+BBEm3ArYZXXL?=
 =?us-ascii?Q?C/fLreNVzHxORoLYkTHFJNuJ4h3hWrCv1dBNvlxlc82gGQOd44740DdGNGXF?=
 =?us-ascii?Q?DCOzlWsIVsmVkl+G7kDOQovsUbebpQkSRT5MAL1eUfAtFMeUeq2Necor5hMe?=
 =?us-ascii?Q?xFjVj/8lyXmCmzCWQXIv+6DyuMQGt9+TiVO8zGfsbxeKxXmL2xjdkUZuhrQP?=
 =?us-ascii?Q?vMokhd2i07/vnTXwR3V61LbUlEAk1M50vDvvEctBp2Spcc7bF9FXni8biezW?=
 =?us-ascii?Q?fRfT6KGZbEAUFoRhCdsuOsAKO1UGvUBRhlvHTE0hwnaQe6oq1aSugzkX7f9p?=
 =?us-ascii?Q?Osx0Lf+dBQjW0aarJC9DHMQ7cXff9YGdmnOeLnJ2C5GbLD+OHEn/KFKgYF6t?=
 =?us-ascii?Q?KNRLJ6P5UUoHo/nMwHDGv/VVrId2csLpaHtuHat/iW26v9IP9rhXsz+aN0eZ?=
 =?us-ascii?Q?1PsA4ALSdG4vcgRLNZaeUJoRC3cUYcaIt275lUNByVA7uBVoM+NeCkFm8g9u?=
 =?us-ascii?Q?yElZ3KXCk3Hul9C5a1yixrEEsbk5DRE7jUZbF3qfzimNCVflBX9LcjLqAdzM?=
 =?us-ascii?Q?2ApoEiWhpkQGXNey9pOsb9B83QsNKAAo+Beoywmi8zhHExcR6cQCNwIxfHVw?=
 =?us-ascii?Q?BqzfYcxrCOpBdX2pSz6OKtGhjyac+45g0j4C/QrPJF6ww8aBhS26gRC90U/P?=
 =?us-ascii?Q?RBKmabXgk+0kkyaHJI1CmE/2VrysIm6w/ns/mwoe4yHtiF9ZkMN7nZDCwdYN?=
 =?us-ascii?Q?gOLvO8LFwfVQP7F3PvPCmS4Q05g25QAcIg5bkv7ZWJT43FGx+qiS0a7K5pEX?=
 =?us-ascii?Q?L5uMWPMbotlOxMtC/Bp7aQnhhIKNA+JL5H+rdF2G/ty0QNQP8PFB+yIo+m1Q?=
 =?us-ascii?Q?rg=3D=3D?=
X-MS-Exchange-CrossTenant-Network-Message-Id: a8dcf8a8-1ca5-4c6f-e485-08da80be555e
X-MS-Exchange-CrossTenant-AuthSource: SJ1PR11MB6297.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Aug 2022 02:06:59.3570
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: 9l9QAcRYrj5LZQPCyij2MeANGfKgPjz7uvh0+lUxG9uFBPjP1CvR0ORQThJqD4FjvW9NTLxqxqt4f9EigAXTtQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PR11MB2850
X-OriginatorOrg: intel.com
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,
        SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham
        autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

hi John,

On Wed, Aug 17, 2022 at 03:04:06PM +0100, John Garry wrote:
> On 17/08/2022 14:51, Oliver Sang wrote:
> 
> Hi Oliver,
> 
> > > v5.19 + 0568e61225 : 512/512
> > > v5.19 + 0568e61225 + 4cbfca5f77 : 512/512
> > > v5.19: 1280/32767
> > > 
> > > They are want makes sense to me, at least.
> > > 
> > > Oliver, can you confirm this? Thanks!
> > I confirm below two:
> > v5.19 + 0568e61225 : 512/512
> > v5.19: 1280/32767 (as last already reported)
> 
> ack
> 
> > 
> > but below failed to build:
> > v5.19 + 0568e61225 + 4cbfca5f77
> > 
> > build_errors:
> >    - "drivers/scsi/scsi_transport_sas.c:242:33: error: implicit declaration of function 'dma_opt_mapping_size'; did you mean 'dma_max_mapping_size'? [-Werror=implicit-function-declaration]"
> >    - "drivers/scsi/scsi_transport_sas.c:241:24: error: 'struct Scsi_Host' has no member named 'opt_sectors'; did you mean 'max_sectors'?"
> > 
> > not sure if I understand this correctly?
> > for this, I just cherry-pick 0568e61225 upon v5.19,
> > then cherry-pick 4cbfca5f77 again.
> > so my branch looks like:
> > 
> > a11d8b97c3ecb8 v5.19 + 0568e61225 + 4cbfca5f77
> > 1b59440cf71f99 v5.19 + 0568e61225
> > 3d7cb6b04c3f31 (tag: v5.19,
> > 
> > did I do the right thing?
> 
> Sorry but I was not really interested in 4cbfca5f77 and I see where that
> build error is coming, but don't be concerned with it. However, for
> avoidance of doubt, if you have results for vanilla v6.0-rc1 then that would
> be appreciated.

for v6.0-rc1, it's still 512/512

> 
> I will also send a separate patch for testing if you don't mind.

sure! we are very glad that we could help.

> 
> thanks,
> John
>