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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2025 06:29:00.3483 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d8f1812d-0108-4e59-2047-08ddb931bb5d X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AM4PEPF00027A5D.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB6506 X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 83E3EA0002 X-Stat-Signature: ifp96jyjkg37woqo8uupje1jpbkyepgo X-HE-Tag: 1751437745-44883 X-HE-Meta: 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 A/us5zwo RcFN5JGu/CmIJEspCUTvQOeGhKSg1M37hCXu9wZ5nICBIR6nfM7Vwurw1EQuLw0kzlfjCGTOOhTIiGDqjvfbK6ae0O9DUI6+J/7VE04+eU3sTD5CU5fIX+OJkEACgdFbKGF8ZNP614A8XFNwYZl2ywXRq+Q6eMl6zGmnYA9GW1YKcLSW87rvaltMyOY7w0bP15q64Z+ETjoZDlLnn3gWt/CmCCLFTqgoyJioLa5s/5rWecKrkXtKOhIaZ97zXAjXEdHvYm1kfqNHCHwL/wKyJDLarXktnCLJyRuynvSdDvypSXGg0G6LhYvVpMmuaqzatX0kBfYf8zt51Q6h5LMEnbOL2CdNSuX7SNn+hlRY0zl0Jql4Sp7DUAzxadE5Ksaqn2F9au/5znDm6WpJ/hjOHXQhh9PVkce38Th7CFn6Eu5eozYh0Xh2ip+UIoSiK8XZrX5VCmSIGDgiqIgT4x/ws1jiKpiPx+sYJw4TnKDmu8LnSBLFAq9iGnjot1cEH/JzybVblwPrPgx0eZHY5sVLkN9JqBOu0z1ls/9xwbuDTw5mMK4OoK34h7EzVsawde8wChNHz+dtnwVgi0u9ZT4lBl3/gOHlBmnxSafuzSus6IQW74OkziDNwS6EPih7oMhBNqzJihuZtLYGcs3TImzLpt0eGZMCbxqnXKBFg X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Byungchul, > > > > > > CPU0 CPU1 > > > vmalloc(); > > > alloc_vmap_area(); > > > spin_lock(&vn->busy.lock) > > ^ > > Here, it should be spin_lock_bh(&vn->busy.lock). > > spin_lock_irqsave(&vn->busy.lock) might be even better, assuming > find_vm_area() could be called with a critcal section of *_irq() or > something. Agree for this change and I also thought about it. But, I'm not sure changing to spin_lock_irqsave() is *better* since it makes a unexpected schedule delay whenever vmalloc_info_show() is called via proc. Also, I think the find_vm_area() is designed for task context not for atomic context. so it seems the misusage in the kasan. Am I missing something? Thanks. -- Sincerely, Yeoreum Yun