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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?Tw9uos8as1A3bmmEJN/hwGnVgUpuT2jDPt8ilJYQT3/PoIXDC5NcxoTO+f8R?= =?us-ascii?Q?avVjeBKXE1ebDdEcbmclfGLBP/tN/nv68fO33YsxlkDvQinTzsTE3RDAN9t8?= =?us-ascii?Q?Y7Tpm35a1gNN3Fx8F+7En/2KUSpZGPnw2CHC2iCWNu8opzapf6oBUXCjkJko?= =?us-ascii?Q?ARya8EkLWNjof0lmN0iWPh7i3YTkMpliiXcqI0EIspuMJ0nxQJLk9QWk7t2v?= =?us-ascii?Q?VoMIDXSS8wMC8Qr6qSnxXqhTpLZ0f6+y/B44WjnNIhtyC+x5SACgYRcScJ+e?= =?us-ascii?Q?tfwstCbjlrbz+zteuOhUXusWpDIs8L5J2W/uHLe41SqAQvh2f5H3sEOjI7S4?= =?us-ascii?Q?aWxD02abGjR8S7lh/JEORvp5/CUOp8/ty9fevu6vb8CkryqOYjcP2QCG/ZqT?= =?us-ascii?Q?4yp0+yxEz5EMWs/I794E3Y0qYqy5iWY53gz5bm5fK5JwjWkQY0EtsaYtV0CH?= =?us-ascii?Q?JqwvJzsxDMFGEKPvbFhLtEnp5Va1WSk411L6EefIxWejxnKkzVh/f8vmeR/I?= =?us-ascii?Q?sSBZ0QPcKRf5ex1/yyCjH6cjeP/KofbZt0bcRbPe4cfxcxvoM8SSTD4l49xH?= =?us-ascii?Q?tn5pBCo9akrtvWwadPGv2jBABTmpJNPduVcEzw/HlSBz0P8X+KXQvvhOY31C?= =?us-ascii?Q?miXYezY9C8oB1x50M4t9Dx4UxZf4+D1IWnjl0DE9Ws8wlWMmhMFpFwqbaxq7?= =?us-ascii?Q?WKZx99ShGaXCO0ERrWj2S6j0MdGqh/sG6FdCU3WFXbn12cqnCDpCtUM246Xk?= =?us-ascii?Q?VLB5w6Lp79qXW/cTdnwMZQon+dd7bxLOO/38UPmuX6EeAgvnhPl10c5cr8Uh?= =?us-ascii?Q?P3dTEjFNQzr13FHy6dV9uajZbSm+4XDDTTHc8dx4ksnBsepCb3tP+qAMB2I3?= =?us-ascii?Q?z4BL0M/y2mNyAhuV/o/XWWhDE9moRcj30YkDDZaxLRtKRpI6Wr6jCsO188NT?= =?us-ascii?Q?pZiDMv4Jd2ZmUuQUNa4L23fQYaPfzRQQgLX4dRnyWWwr5c6/IMWSW4i9H13s?= =?us-ascii?Q?xl9Srz/FS9kCF1T+TpuoOHnQYdkg37xCzkG4TfcQneArw4OGlx9c16VQDJkF?= =?us-ascii?Q?esOMV/B/gh4P8N1ak3yq7EnQh4c7jTIwUprNoIBcUGM9hsRGCVQ+2F5GENvA?= =?us-ascii?Q?ciiT4ZNpAs8eKY5IGc2DAKkFsQcZcjRZt1fkaMqOCGcypjk2M/mrbGHO5XxE?= =?us-ascii?Q?pop4RbyDxpj7H9MNEmmw2Q90iR0QYF+m6TqhPUPBK4XIg9bsObuDRFfk5wHB?= =?us-ascii?Q?bqVOG35kZEgYQ4dfzSdBp57BgQhqKB8QNEFZljuIm6onNUYVntcPFcw747Vw?= =?us-ascii?Q?qs1o2jHcaYUqZEqImDzwxlPxg6g81QtT2WsEH2XrNNTnd3/9hcNACp1dP6Su?= =?us-ascii?Q?qKdaWCFW54yDA5h0AKgV+YZZimXXMVBucFfS4HQNIDBeg46JLSj18j0tE1K8?= =?us-ascii?Q?fCJ0iUXz6csUWmlJb2+LBB+RFuhx7FFyef0DN2QgBBr5Fo/bY8TFh9vRdIms?= =?us-ascii?Q?dL0UkDHShUYqLnB7FWqP7s+GJP8ptelJp/pd24o75yAeEakMyOhopIAh0Lgw?= =?us-ascii?Q?qm9yh39DTZlNdIrcTK+lAppDcMtOteF1g9IOT9KBjxjmOcnei0ogVJ6o/+PG?= =?us-ascii?Q?9tfJJP+84tLdCgCAX6sAT9ZzHJMtS8PcjP+V1pAAmHKZ5WN46EoYgUwVsc7g?= =?us-ascii?Q?XcFyRFJgu38pNQ+t8nKMF7cTINOnsymmiasbTUV/mHD338LMlxC/XF/tf1lG?= =?us-ascii?Q?5KDsKyQfag=3D=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 59dd5281-6b18-4f5f-1727-08def24422ed X-MS-Exchange-CrossTenant-AuthSource: LV8PR12MB9620.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Aug 2026 16:19:19.2129 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: UE0tp6272eAhCVnKGCC2St30770E+vmHzm0pLt/IDgmOiNla5gligVnWs9YEyz29 X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA5PPFB9BA66B77 On Tue, Aug 04, 2026 at 09:04:32AM -0700, Nicolin Chen wrote: > On Tue, Aug 04, 2026 at 11:17:04AM -0300, Jason Gunthorpe wrote: > > On Tue, Aug 04, 2026 at 03:02:46PM +0100, Will Deacon wrote: > > > > Would skipping their allocation when is_kdump_kernel() be acceptable on > > > > its own, or would you rather see it done differently? > > > > > > With Nicolin's patch, we can just avoid allocating the priq and the evtq > > > entirely in the kdump case. We can then add a cmdline option to control > > > the maximum size of the cmdq, which is useful regardless of kdump. > > > > I would still prefer kdump do this re-sizing automatically, even if we > > do add a commandline. It makes it easire to deploy than having to know > > secret command lines :\ > > > > So functionally I still think this patch is fine, though yes it points > > out more things in Nicolin's work too. > > I will send a v10 of mine, to skip the EVTQ/PRIQ allocations. I think Robin's point is to structure the v10 so you introduce a bunch of tunables, including something like 0 size to disable a feature. Then have kdump default those tunables to the right thing Jason