diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-11-06 15:42:08 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-11-06 15:42:08 -0800 |
| commit | cdd5b5a9761fd66d17586e4f4ba6588c70e640ea (patch) | |
| tree | aba8409818be01f6af8683bf76594c790942d0bc /kernel/fork.c | |
| parent | 5c15c60e7be615f05a45cd905093a54b11f461bc (diff) | |
| parent | 28d3fe32354701decc3e76d89712569c269b5e4f (diff) | |
Merge branch 'next' into for-linus
Prepare input updates for 6.7 merge window.
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 41c964104b58..d2e12b6d2b18 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -252,23 +252,19 @@ static int memcg_charge_kernel_stack(struct vm_struct *vm) { int i; int ret; + int nr_charged = 0; - BUILD_BUG_ON(IS_ENABLED(CONFIG_VMAP_STACK) && PAGE_SIZE % 1024 != 0); BUG_ON(vm->nr_pages != THREAD_SIZE / PAGE_SIZE); for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++) { ret = memcg_kmem_charge_page(vm->pages[i], GFP_KERNEL, 0); if (ret) goto err; + nr_charged++; } return 0; err: - /* - * If memcg_kmem_charge_page() fails, page's memory cgroup pointer is - * NULL, and memcg_kmem_uncharge_page() in free_thread_stack() will - * ignore this page. - */ - for (i = 0; i < THREAD_SIZE / PAGE_SIZE; i++) + for (i = 0; i < nr_charged; i++) memcg_kmem_uncharge_page(vm->pages[i], 0); return ret; } @@ -690,6 +686,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm, for_each_vma(old_vmi, mpnt) { struct file *file; + vma_start_write(mpnt); if (mpnt->vm_flags & VM_DONTCOPY) { vm_stat_account(mm, mpnt->vm_flags, -vma_pages(mpnt)); continue; |