The quilt patch titled
Subject: mm/shmem: use a folio in shmem_unused_huge_shrink
has been removed from the -mm tree. Its filename was
mm-shmem-use-a-folio-in-shmem_unused_huge_shrink.patch
This patch was dropped because it was merged into the mm-stable branch\nof git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm/shmem: use a folio in shmem_unused_huge_shrink
When calling split_huge_page() we usually have to find the precise page,
but that's not necessary here because we only need to unlock and put the
folio afterwards. Saves 231 bytes of text (20% of this function).
Link: https://lkml.kernel.org/r/20220504182857.4013401-17-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/shmem.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
--- a/mm/shmem.c~mm-shmem-use-a-folio-in-shmem_unused_huge_shrink
+++ a/mm/shmem.c
@@ -554,7 +554,7 @@ static unsigned long shmem_unused_huge_s
LIST_HEAD(to_remove);
struct inode *inode;
struct shmem_inode_info *info;
- struct page *page;
+ struct folio *folio;
unsigned long batch = sc ? sc->nr_to_scan : 128;
int split = 0;
@@ -598,6 +598,7 @@ next:
list_for_each_safe(pos, next, &list) {
int ret;
+ pgoff_t index;
info = list_entry(pos, struct shmem_inode_info, shrinklist);
inode = &info->vfs_inode;
@@ -605,14 +606,14 @@ next:
if (nr_to_split && split >= nr_to_split)
goto move_back;
- page = find_get_page(inode->i_mapping,
- (inode->i_size & HPAGE_PMD_MASK) >> PAGE_SHIFT);
- if (!page)
+ index = (inode->i_size & HPAGE_PMD_MASK) >> PAGE_SHIFT;
+ folio = filemap_get_folio(inode->i_mapping, index);
+ if (!folio)
goto drop;
/* No huge page at the end of the file: nothing to split */
- if (!PageTransHuge(page)) {
- put_page(page);
+ if (!folio_test_large(folio)) {
+ folio_put(folio);
goto drop;
}
@@ -623,14 +624,14 @@ next:
* Waiting for the lock may lead to deadlock in the
* reclaim path.
*/
- if (!trylock_page(page)) {
- put_page(page);
+ if (!folio_trylock(folio)) {
+ folio_put(folio);
goto move_back;
}
- ret = split_huge_page(page);
- unlock_page(page);
- put_page(page);
+ ret = split_huge_page(&folio->page);
+ folio_unlock(folio);
+ folio_put(folio);
/* If split failed move the inode on the list back to shrinklist */
if (ret)
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-add-vma-iterator.patch
mmap-use-the-vma-iterator-in-count_vma_pages_range.patch
proc-remove-vma-rbtree-use-from-nommu.patch
arm64-remove-mmap-linked-list-from-vdso.patch
parisc-remove-mmap-linked-list-from-cache-handling.patch
powerpc-remove-mmap-linked-list-walks.patch
s390-remove-vma-linked-list-walks.patch
x86-remove-vma-linked-list-walks.patch
xtensa-remove-vma-linked-list-walks.patch
cxl-remove-vma-linked-list-walk.patch
optee-remove-vma-linked-list-walk.patch
um-remove-vma-linked-list-walk.patch
coredump-remove-vma-linked-list-walk.patch
exec-use-vma-iterator-instead-of-linked-list.patch
fs-proc-task_mmu-stop-using-linked-list-and-highest_vm_end.patch
acct-use-vma-iterator-instead-of-linked-list.patch
perf-use-vma-iterator.patch
sched-use-maple-tree-iterator-to-walk-vmas.patch
fork-use-vma-iterator.patch
mm-khugepaged-stop-using-vma-linked-list.patch
mm-ksm-use-vma-iterators-instead-of-vma-linked-list.patch
mm-mlock-use-vma-iterator-and-maple-state-instead-of-vma-linked-list.patch
mm-pagewalk-use-vma_find-instead-of-vma-linked-list.patch
i915-use-the-vma-iterator.patch
nommu-remove-uses-of-vma-linked-list.patch
