The quilt patch titled
Subject: vmscan: convert dirty page handling to folios
has been removed from the -mm tree. Its filename was
vmscan-convert-dirty-page-handling-to-folios.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: vmscan: convert dirty page handling to folios
Mostly this just eliminates calls to compound_head(), but
NR_VMSCAN_IMMEDIATE was being incremented by 1 instead of by nr_pages.
Link: https://lkml.kernel.org/r/20220504182857.4013401-10-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 48 ++++++++++++++++++++++++++----------------------
1 file changed, 26 insertions(+), 22 deletions(-)
--- a/mm/vmscan.c~vmscan-convert-dirty-page-handling-to-folios
+++ a/mm/vmscan.c
@@ -1787,28 +1787,31 @@ retry:
}
}
- if (PageDirty(page)) {
+ if (folio_test_dirty(folio)) {
/*
- * Only kswapd can writeback filesystem pages
+ * Only kswapd can writeback filesystem folios
* to avoid risk of stack overflow. But avoid
- * injecting inefficient single-page IO into
+ * injecting inefficient single-folio I/O into
* flusher writeback as much as possible: only
- * write pages when we've encountered many
- * dirty pages, and when we've already scanned
- * the rest of the LRU for clean pages and see
- * the same dirty pages again (PageReclaim).
+ * write folios when we've encountered many
+ * dirty folios, and when we've already scanned
+ * the rest of the LRU for clean folios and see
+ * the same dirty folios again (with the reclaim
+ * flag set).
*/
- if (page_is_file_lru(page) &&
- (!current_is_kswapd() || !PageReclaim(page) ||
+ if (folio_is_file_lru(folio) &&
+ (!current_is_kswapd() ||
+ !folio_test_reclaim(folio) ||
!test_bit(PGDAT_DIRTY, &pgdat->flags))) {
/*
* Immediately reclaim when written back.
- * Similar in principal to deactivate_page()
- * except we already have the page isolated
+ * Similar in principle to deactivate_page()
+ * except we already have the folio isolated
* and know it's dirty
*/
- inc_node_page_state(page, NR_VMSCAN_IMMEDIATE);
- SetPageReclaim(page);
+ node_stat_mod_folio(folio, NR_VMSCAN_IMMEDIATE,
+ nr_pages);
+ folio_set_reclaim(folio);
goto activate_locked;
}
@@ -1821,8 +1824,8 @@ retry:
goto keep_locked;
/*
- * Page is dirty. Flush the TLB if a writable entry
- * potentially exists to avoid CPU writes after IO
+ * Folio is dirty. Flush the TLB if a writable entry
+ * potentially exists to avoid CPU writes after I/O
* starts and then write it out here.
*/
try_to_unmap_flush_dirty();
@@ -1834,23 +1837,24 @@ retry:
case PAGE_SUCCESS:
stat->nr_pageout += nr_pages;
- if (PageWriteback(page))
+ if (folio_test_writeback(folio))
goto keep;
- if (PageDirty(page))
+ if (folio_test_dirty(folio))
goto keep;
/*
* A synchronous write - probably a ramdisk. Go
- * ahead and try to reclaim the page.
+ * ahead and try to reclaim the folio.
*/
- if (!trylock_page(page))
+ if (!folio_trylock(folio))
goto keep;
- if (PageDirty(page) || PageWriteback(page))
+ if (folio_test_dirty(folio) ||
+ folio_test_writeback(folio))
goto keep_locked;
- mapping = page_mapping(page);
+ mapping = folio_mapping(folio);
fallthrough;
case PAGE_CLEAN:
- ; /* try to free the page below */
+ ; /* try to free the folio below */
}
}
_
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
