The patch titled
Subject: mm/memory: convert do_read_fault() to use folios
has been added to the -mm mm-unstable branch. Its filename is
mm-memory-convert-do_read_fault-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-do_read_fault-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
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------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Subject: mm/memory: convert do_read_fault() to use folios
Date: Thu, 6 Jul 2023 09:38:47 -0700
Saves one implicit call to compound_head().
Link: https://lkml.kernel.org/r/20230706163847.403202-4-sidhartha.kumar@xxxxxxxxxx
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/mm/memory.c~mm-memory-convert-do_read_fault-to-use-folios
+++ a/mm/memory.c
@@ -4542,6 +4542,7 @@ static inline bool should_fault_around(s
static vm_fault_t do_read_fault(struct vm_fault *vmf)
{
vm_fault_t ret = 0;
+ struct folio *folio;
/*
* Let's call ->map_pages() first and use ->fault() as fallback
@@ -4559,9 +4560,10 @@ static vm_fault_t do_read_fault(struct v
return ret;
ret |= finish_fault(vmf);
- unlock_page(vmf->page);
+ folio = page_folio(vmf->page);
+ folio_unlock(folio);
if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY)))
- 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
