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mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from BN9PR11MB5482.namprd11.prod.outlook.com (2603:10b6:408:103::16) by DM4PR11MB6094.namprd11.prod.outlook.com (2603:10b6:8:ab::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9542.9; Tue, 20 Jan 2026 08:27:24 +0000 Received: from BN9PR11MB5482.namprd11.prod.outlook.com ([fe80::d269:c67e:1cc2:d1ca]) by BN9PR11MB5482.namprd11.prod.outlook.com ([fe80::d269:c67e:1cc2:d1ca%6]) with mapi id 15.20.9520.009; Tue, 20 Jan 2026 08:27:24 +0000 Message-ID: <84c23355-5fae-4093-989c-ddf2e97376c1@intel.com> Date: Tue, 20 Jan 2026 09:27:19 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v12 2/4] drm/xe: Update wedged.mode only after successful reset policy change To: =?UTF-8?Q?Thomas_Hellstr=C3=B6m?= , CC: , , References: <20260107174741.29163-1-lukasz.laguna@intel.com> <20260107174741.29163-3-lukasz.laguna@intel.com> Content-Language: en-US From: "Laguna, Lukasz" In-Reply-To: Content-Type: text/plain; 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This could leave the driver reporting a wedged.mode state >> that doesn't match the actual reset behavior programmed in GuC. >> >> With this change, the reset policy is updated first, and the driver's >> wedged.mode state is modified only if the policy update succeeds on >> all >> available GTs. >> >> This patch also introduces two functional improvements: >> >>  - The policy is sent to GuC only when a change is required. An >> update >>    is needed only when entering or leaving >> XE_WEDGED_MODE_UPON_ANY_HANG, >>    because only in that case the reset policy changes. For example, >>    switching between XE_WEDGED_MODE_UPON_CRITICAL_ERROR and >>    XE_WEDGED_MODE_NEVER doesn't affect the reset policy, so there is >> no >>    need to send the same value to GuC. >> >>  - An inconsistent_reset flag is added to track cases where reset >> policy >>    update succeeds only on a subset of GTs. If such inconsistency is >>    detected, future wedged mode configuration will force a retry of >> the >>    reset policy update to restore a consistent state across all GTs. >> >> Fixes: 6b8ef44cc0a9 ("drm/xe: Introduce the wedged_mode debugfs") > This patch causes conflicts in the drm-xe-fixes branch that are not > trivially resolved since it seems to depend on various previous > patches. > > This will likely make backporting also to earlier kernels a pain, > ("dim fixes 6b8ef44cc0a9" indicates the fixed commit goes back to linux > 6.11). > > Could you please provide a backport of this patch that compiles and > works with the drm-xe-fixes branch? > > Thanks, > Thomas > Hi Thomas, Yes, I'll prepare a backport. Regards, Lukasz