[PATCH v3 04/15] mm: rework the parameter of lock_page_or_retry()
flat view
STALE1798d
From: Qi Zheng <hidden>
Date: 2021-11-10 10:55:04
Also in:
linux-mm, lkml
Subsystem:
memory management, memory management - core, page cache, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Matthew Wilcox, Jan Kara, Linus Torvalds
Revision v3 of 4 in this series.
Revisions (4)
- v1 [diff vs current]
- v2 [diff vs current]
- v3
- v3 current
We need the vmf in lock_page_or_retry() in the subsequent patch, so pass in it directly. Signed-off-by: Qi Zheng <redacted> --- include/linux/pagemap.h | 8 +++----- mm/filemap.c | 6 ++++-- mm/memory.c | 4 ++-- 3 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 6a30916b76e5..94f9547b4411 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h@@ -709,8 +709,7 @@ static inline bool wake_page_match(struct wait_page_queue *wait_page, void __folio_lock(struct folio *folio); int __folio_lock_killable(struct folio *folio); -bool __folio_lock_or_retry(struct folio *folio, struct mm_struct *mm, - unsigned int flags); +bool __folio_lock_or_retry(struct folio *folio, struct vm_fault *vmf); void unlock_page(struct page *page); void folio_unlock(struct folio *folio);
@@ -772,14 +771,13 @@ static inline int lock_page_killable(struct page *page) * Return value and mmap_lock implications depend on flags; see * __folio_lock_or_retry(). */ -static inline bool lock_page_or_retry(struct page *page, struct mm_struct *mm, - unsigned int flags) +static inline bool lock_page_or_retry(struct page *page, struct vm_fault *vmf) { struct folio *folio; might_sleep(); folio = page_folio(page); - return folio_trylock(folio) || __folio_lock_or_retry(folio, mm, flags); + return folio_trylock(folio) || __folio_lock_or_retry(folio, vmf); } /*
diff --git a/mm/filemap.c b/mm/filemap.c
index 07c654202870..ff8d19b7ce1d 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -1695,9 +1695,11 @@ static int __folio_lock_async(struct folio *folio, struct wait_page_queue *wait) * If neither ALLOW_RETRY nor KILLABLE are set, will always return true * with the folio locked and the mmap_lock unperturbed. */ -bool __folio_lock_or_retry(struct folio *folio, struct mm_struct *mm, - unsigned int flags) +bool __folio_lock_or_retry(struct folio *folio, struct vm_fault *vmf) { + unsigned int flags = vmf->flags; + struct mm_struct *mm = vmf->vma->vm_mm; + if (fault_flag_allow_retry_first(flags)) { /* * CAUTION! In this case, mmap_lock is not released
diff --git a/mm/memory.c b/mm/memory.c
index b00cd60fc368..bec6a5d5ee7c 100644
--- a/mm/memory.c
+++ b/mm/memory.c@@ -3443,7 +3443,7 @@ static vm_fault_t remove_device_exclusive_entry(struct vm_fault *vmf) struct vm_area_struct *vma = vmf->vma; struct mmu_notifier_range range; - if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) + if (!lock_page_or_retry(page, vmf)) return VM_FAULT_RETRY; mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0, vma, vma->vm_mm, vmf->address & PAGE_MASK,
@@ -3576,7 +3576,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) goto out_release; } - locked = lock_page_or_retry(page, vma->vm_mm, vmf->flags); + locked = lock_page_or_retry(page, vmf); delayacct_clear_flag(current, DELAYACCT_PF_SWAPIN); if (!locked) {
--
2.11.0