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Mon, 6 Jul 2020 13:28:09 +0000 From: Michael Kelley To: Wei Liu , Sasha Levin CC: Joseph Salisbury , KY Srinivasan , Haiyang Zhang , Stephen Hemminger , "linux-hyperv@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: RE: [PATCH][v2] Drivers: hv: Change flag to write log level in panic msg to false Thread-Topic: [PATCH][v2] Drivers: hv: Change flag to write log level in panic msg to false Thread-Index: AQHWTAkXmuOBf0oGFkmi/qMqVkrGI6jzJOeAgAdLC4CAAChR4A== Date: Mon, 6 Jul 2020 13:28:09 +0000 Message-ID: References: <1593210497-114310-1-git-send-email-joseph.salisbury@microsoft.com> <20200701193326.12D69214DB@mail.kernel.org> <20200706105549.xum3y7hmviatil2w@liuwe-devbox-debian-v2> In-Reply-To: <20200706105549.xum3y7hmviatil2w@liuwe-devbox-debian-v2> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=true; MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2020-07-06T13:28:07Z; 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x-ms-exchange-antispam-messagedata: RRf3LMT4vZSI3oPrlVDKl5OntSnKO7qzQOA7i36UwutA2NCMF13Sf+OGcqqamaDdKMJF8aDFYiawIH54vYnzvJ/Vpm7Pm4jVLPTbwdGKiVk06Ea/gAqQKiG4VgdFzwVo1h22FGV+z60Uc6X2tOtzUriFAS8OQhf4CmYQBmQi46/vrRJFGdgMCAxA7JuMUQw5t2Nnfoh1B8UUIOGuiMxkaDpTFhRkt3O7E3vKr4WfVyi2BHjmjeegsKaH4NL90k1JAchJX6AzEq9qvYptfPiXfuo5YUY4jQ0M4iKucWFoRX+jwUgSiEkE7d3ax5JVo67So6Yppw+voIx0JaLdkkgJo5304ht3Ce9Pdjkc0JmCUonjJiruXT1cpua2YsIK2mkH035txYvFyzygDpi6HZ7OavOcZQmKg51tPMTygejxHaYeeyDt9GqT9+Ca0XV4TSQPNGRBsWhvQNVBpRWv8G1/euNLDUWwXGsco4CIgA9Ll5s= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MW2PR2101MB1052.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: c229922e-2ade-4ef0-2769-08d821b06ced X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Jul 2020 13:28:09.7247 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: RBo3iVuR30aV5VoYIWYBt8ZOvVbp+CZ+MHzFyDupWkgYqwBSsq32kQ2QdCq7bnWjV4aqwyRtje6uBODan6Cjpmw0sbbdGG/vxL8HWktPLIw= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR2101MB0730 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org From: Wei Liu Sent: Monday, July 6, 2020 3:56 AM >=20 > On Wed, Jul 01, 2020 at 07:33:25PM +0000, Sasha Levin wrote: > > Hi > > > > [This is an automated email] > > > > This commit has been processed because it contains a -stable tag. > > The stable tag indicates that it's relevant for the following trees: al= l > > > > The bot has tested the following trees: v5.7.6, v5.4.49, v4.19.130, v4.= 14.186, v4.9.228, > v4.4.228. > > > > v5.7.6: Build OK! > > v5.4.49: Failed to apply! Possible dependencies: > > 53edce00ceb74 ("Drivers: hv: vmbus: Remove dependencies on guest pa= ge size") >=20 > Unrelated, shouldn't be backported. >=20 > > > > v4.19.130: Failed to apply! Possible dependencies: > > 53edce00ceb74 ("Drivers: hv: vmbus: Remove dependencies on guest pa= ge size") > > >=20 > Unrelated, shouldn't be backported. >=20 > > v4.14.186: Failed to apply! Possible dependencies: > > 4a5f3cde4d51c ("Drivers: hv: vmbus: Remove x86-isms from arch indep= endent drivers") > > 53edce00ceb74 ("Drivers: hv: vmbus: Remove dependencies on guest pa= ge size") > > 7ed4325a44ea5 ("Drivers: hv: vmbus: Make panic reporting to be more= useful") > > 81b18bce48af3 ("Drivers: HV: Send one page worth of kmsg dump over = Hyper-V during > panic") > > 8afc06dd75c06 ("Drivers: hv: vmbus: Fix the issue with freeing up h= v_ctl_table_hdr") > > ddcaf3ca4c3c8 ("Drivers: hv: vmus: Fix the check for return value f= rom kmsg get dump > buffer") > > > > v4.9.228: Failed to apply! Possible dependencies: > > 4a5f3cde4d51c ("Drivers: hv: vmbus: Remove x86-isms from arch indep= endent drivers") > > 6ab42a66d2cc1 ("Drivers: hv: vmbus: Move Hypercall invocation code = out of common > code") > > 73638cddaad86 ("Drivers: hv: vmbus: Move the check for hypercall pa= ge setup") > > 76d36ab798204 ("hv: switch to cpuhp state machine for synic init/cl= eanup") > > 81b18bce48af3 ("Drivers: HV: Send one page worth of kmsg dump over = Hyper-V during > panic") > > 8730046c1498e ("Drivers: hv vmbus: Move Hypercall page setup out of= common code") > > d058fa7e98ff0 ("Drivers: hv: vmbus: Move the crash notification fun= ction") > > > > v4.4.228: Failed to apply! Possible dependencies: > > 4a5f3cde4d51c ("Drivers: hv: vmbus: Remove x86-isms from arch indep= endent drivers") > > 619848bd07434 ("drivers:hv: Export a function that maps Linux CPU n= um onto Hyper-V > proc num") > > 6ab42a66d2cc1 ("Drivers: hv: vmbus: Move Hypercall invocation code = out of common > code") > > 73638cddaad86 ("Drivers: hv: vmbus: Move the check for hypercall pa= ge setup") > > 75ff3a8a9168d ("Drivers: hv: vmbus: avoid wait_for_completion() on = crash") > > 76d36ab798204 ("hv: switch to cpuhp state machine for synic init/cl= eanup") > > 81b18bce48af3 ("Drivers: HV: Send one page worth of kmsg dump over = Hyper-V during > panic") > > 8730046c1498e ("Drivers: hv vmbus: Move Hypercall page setup out of= common code") > > a108393dbf764 ("drivers:hv: Export the API to invoke a hypercall on= Hyper-V") > > d058fa7e98ff0 ("Drivers: hv: vmbus: Move the crash notification fun= ction") >=20 > Just from reading the subject lines it seems to me a lot of the possible > dependencies aren't really related to this patch functionally. It could > be that they are touching the same area of code which create some > contextual dependencies. Some of the listed dependencies should > definitively _not_ be backported. >=20 > Michael and Joseph, how far do you want this to be backported? It may be > easier for us to provide bespoke versions of this patch to the stable > trees we care about? >=20 The code being changed was added in 4.19, so that's the earliest kernel ver= sion to which it makes sense to backport. 53edce00ceb74 is an unrelated change to the same line of code (changes PAGE_SIZE to HV_HYP_PAGE_SIZE), so a besp= oke version of this patch is needed for the stable trees. All-in-all, this pat= ch is a modest optimization, so backporting is nice but not required. Michael