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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jun 2025 08:57:10.6995 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fc5670a0-2f16-48e7-eed2-08ddb233f0b4 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: AMS0EPF00000197.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB6262 On 23/06/25 1:34 pm, Alexander Gordeev wrote: > There is not need to modify page table synchronization mask > while apply_to_pte_range() holds user page tables spinlock. I don't get you, what is the problem with the current code? Are you just concerned about the duration of holding the lock? > > Signed-off-by: Alexander Gordeev > --- > mm/memory.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/mm/memory.c b/mm/memory.c > index 8eba595056fe..6849ab4e44bf 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -3035,12 +3035,13 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd, > } > } while (pte++, addr += PAGE_SIZE, addr != end); > } > - *mask |= PGTBL_PTE_MODIFIED; > > arch_leave_lazy_mmu_mode(); > > if (mm != &init_mm) > pte_unmap_unlock(mapped_pte, ptl); > + *mask |= PGTBL_PTE_MODIFIED; > + > return err; > } >