Displaying 4 results from an estimated 4 matches for "mmu_notify_exclusive".
2023 Mar 28
3
[PATCH] mm: Take a page reference when removing device exclusive entries
...If the page is
+ * free the entry must have been removed already.
+ */
+ if (!get_page_unless_zero(vmf->page))
+ return 0;
+
+ if (!folio_lock_or_retry(folio, vma->vm_mm, vmf->flags)) {
+ put_page(vmf->page);
return VM_FAULT_RETRY;
+ }
mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0, vma,
vma->vm_mm, vmf->address & PAGE_MASK,
(vmf->address & PAGE_MASK) + PAGE_SIZE, NULL);
@@ -3637,6 +3648,7 @@ static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf)
pte_unmap_unlock(vmf->pte, vmf->ptl);
folio_unlock(folio);
+ put_page(vmf-...
2023 Mar 30
4
[PATCH v2] mm: Take a page reference when removing device exclusive entries
...already
+ * been re-allocated after being freed all we do is lock and
+ * unlock it.
+ */
+ if (!folio_try_get(folio))
+ return 0;
+
+ if (!folio_lock_or_retry(folio, vma->vm_mm, vmf->flags)) {
+ folio_put(folio);
return VM_FAULT_RETRY;
+ }
mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0,
vma->vm_mm, vmf->address & PAGE_MASK,
(vmf->address & PAGE_MASK) + PAGE_SIZE, NULL);
@@ -3577,6 +3590,7 @@ static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf)
pte_unmap_unlock(vmf->pte, vmf->ptl);
folio_unlock(folio);
+ folio_put(folio);...
2023 Mar 29
1
[PATCH] mm: Take a page reference when removing device exclusive entries
...d be:
if (!folio_try_get(folio))
return 0;
(you can fix up the comment yourself)
> + if (!folio_lock_or_retry(folio, vma->vm_mm, vmf->flags)) {
> + put_page(vmf->page);
folio_put(folio);
> return VM_FAULT_RETRY;
> + }
> mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0, vma,
> vma->vm_mm, vmf->address & PAGE_MASK,
> (vmf->address & PAGE_MASK) + PAGE_SIZE, NULL);
> @@ -3637,6 +3648,7 @@ static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf)
>
> pte_unmap_unlock(vmf->pte, vmf->ptl);
> folio_...
2023 Mar 28
1
[PATCH] mm: Take a page reference when removing device exclusive entries
...been removed already.
> + */
> + if (!get_page_unless_zero(vmf->page))
> + return 0;
> +
> + if (!folio_lock_or_retry(folio, vma->vm_mm, vmf->flags)) {
> + put_page(vmf->page);
> return VM_FAULT_RETRY;
> + }
> mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0, vma,
> vma->vm_mm, vmf->address & PAGE_MASK,
> (vmf->address & PAGE_MASK) + PAGE_SIZE, NULL);
> @@ -3637,6 +3648,7 @@ static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf)
>
> pte_unmap_unlock(vmf->pte, vmf->ptl);
> folio_...