The patch titled
Subject: mm/memory: convert wp_page_shared() to use folios
has been added to the -mm mm-unstable branch. Its filename is
mm-memory-convert-wp_page_shared-to-use-folios.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-convert-wp_page_shared-to-use-folios.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/memory: convert wp_page_shared() to use folios
Date: Sun, 2 Jul 2023 22:58:48 -0700
Saves five implicit calls to compound_head().
Link: https://lkml.kernel.org/r/20230703055850.227169-2-sidhartha.kumar@xxxxxxxxxx
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reviewed-by: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
--- a/mm/memory.c~mm-memory-convert-wp_page_shared-to-use-folios
+++ a/mm/memory.c
@@ -3287,8 +3287,9 @@ static vm_fault_t wp_page_shared(struct
{
struct vm_area_struct *vma = vmf->vma;
vm_fault_t ret = 0;
+ struct folio *folio = page_folio(vmf->page);
- get_page(vmf->page);
+ folio_get(folio);
if (vma->vm_ops && vma->vm_ops->page_mkwrite) {
vm_fault_t tmp;
@@ -3297,21 +3298,21 @@ static vm_fault_t wp_page_shared(struct
tmp = do_page_mkwrite(vmf);
if (unlikely(!tmp || (tmp &
(VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
- put_page(vmf->page);
+ folio_put(folio);
return tmp;
}
tmp = finish_mkwrite_fault(vmf);
if (unlikely(tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) {
- unlock_page(vmf->page);
- put_page(vmf->page);
+ folio_unlock(folio);
+ folio_put(folio);
return tmp;
}
} else {
wp_page_reuse(vmf);
- lock_page(vmf->page);
+ folio_lock(folio);
}
ret |= fault_dirty_shared_page(vmf);
- put_page(vmf->page);
+ folio_put(folio);
return ret;
}
_
Patches currently in -mm which might be from sidhartha.kumar@xxxxxxxxxx are
mm-increase-usage-of-folio_next_index-helper.patch
mm-memory-convert-do_page_mkwrite-to-use-folios.patch
mm-memory-convert-wp_page_shared-to-use-folios.patch
mm-memory-convert-do_shared_fault-to-folios.patch
mm-memory-convert-do_read_fault-to-use-folios.patch
