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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jul 2025 15:32:52.8773 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 99886a30-e701-427b-63fb-08ddc9fe308b 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: DU2PEPF0001E9BF.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9693 On 23/07/25 8:58 pm, Zi Yan wrote: > On 18 Jul 2025, at 5:02, Dev Jain wrote: > >> Patch 6 optimizes mprotect() by batch clearing the ptes, masking in the new > “Patch 6” might not make sense when reading it in the git log. Something like > below might be better: Andrew has fixed that for me :) > > mprotect() will be optimized by batch clearing the ptes, masking in the new > protections, and batch setting the ptes in an upcoming commit. > > No need to repin for this one. > >> protections, and batch setting the ptes. Suppose that the first pte >> of the batch is writable - with the current implementation of >> folio_pte_batch(), it is not guaranteed that the other ptes in the batch >> are already writable too, so we may incorrectly end up setting the >> writable bit on all ptes via modify_prot_commit_ptes(). >> >> Therefore, introduce FPB_RESPECT_WRITE so that all ptes in the batch >> are writable or not. >> >> Signed-off-by: Dev Jain >> --- >> mm/internal.h | 11 ++++++++--- >> 1 file changed, 8 insertions(+), 3 deletions(-) >> > LGTM. Reviewed-by: Zi Yan Thanks. > > Best Regards, > Yan, Zi