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Peter Anvin" , Andrew Morton , Dave Chinner , Qi Zheng , Roman Gushchin , Muchun Song , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Uladzislau Rezki , David Hildenbrand , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Kees Cook , Sebastian Andrzej Siewior , Clark Williams , CC: , , , References: <20260827232948.2520558-1-stevensd@google.com> <20260827232948.2520558-9-stevensd@google.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20260827232948.2520558-9-stevensd@google.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00012E7E:EE_|DM4PR12MB6446:EE_ X-MS-Office365-Filtering-Correlation-Id: ff09e39e-49d5-4443-5c3b-08df04ce5e55 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|82310400026|1800799024|36860700016|23010399003|921020|10067099003|56012099006|11063799006|4143699003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(7416014)(376014)(82310400026)(1800799024)(36860700016)(23010399003)(921020)(10067099003)(56012099006)(11063799006)(4143699003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: /bzQXGIkGDqcDuPC1G2P1h9VV7iiEZiesIogpH3lLIWj9QabAa1h8O1pxrHTg1WjUAx32pWkcCUXkcbYvY5nQ4N7Wmo3yYuPKdO6YL/6p0/RfexFDv1TEifdhW2xrwMXxGtnE4ZBTmlVDSfKwagwpPVFwesJ5IP+2gQ17jUp1pLDrgseTbtDnvQGXb2jBySPbIllIDZf9ov/FaqpMaT1ra8Wx/Qs97ZGQbkPr4yDlmopi14KrlpCgaxrskYaC3GAyBKG6Zrd3wXuthzIZYSi5DEhEohP95ebdTj/PrcRYz+4Ttlfr/ZQpAVQ+IGUE1djtsLHeMzyAnUPN8M9L4bJ784yTebEFKqxNuP1MbYZc2LPse7/3I1Xk+36cfZ6p4W1r5sNoSx/6dSNjU7BJySNN5pKv2JnuQRkS/mUEIJfKquRneDzWSg3M9i0wvyuaplg X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Aug 2026 06:34:10.0970 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ff09e39e-49d5-4443-5c3b-08df04ce5e55 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00012E7E.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6446 Hello David, On 8/28/2026 4:59 AM, David Stevens wrote: > @@ -469,16 +470,23 @@ anon_pipe_read(struct kiocb *iocb, struct iov_iter *to) > break; > } > mutex_unlock(&pipe->mutex); > - /* > - * We only get here if we didn't actually read anything. > - * > - * But because we didn't read anything, at this point we can > - * just return directly with -ERESTARTSYS if we're interrupted, > - * since we've done any required wakeups and there's no need > - * to mark anything accessed. And we've dropped the lock. > - */ > - if (wait_event_interruptible_exclusive(pipe->rd_wait, pipe_readable(pipe)) < 0) > - return -ERESTARTSYS; > + > + { > + guard(allow_stack_reclaim)(); nit. You can just use a scoped_guard(allow_stack_reclaim) { if (wait_event_interruptible_exclusive(...)) return -ERESTARTSYS; } here. Same comment for rest of the thread where a scoped_guard() can be used instead of this pattern. > + /* > + * We only get here if we didn't actually read > + * anything. > + * > + * But because we didn't read anything, at this point > + * we can just return directly with -ERESTARTSYS if > + * we're interrupted, since we've done any required > + * wakeups and there's no need to mark anything > + * accessed. And we've dropped the lock. > + */ > + if (wait_event_interruptible_exclusive(pipe->rd_wait, > + pipe_readable(pipe)) < 0) > + return -ERESTARTSYS; > + } -- Thanks and Regards, Prateek