+ khugepaged-rename-collapse_shmem-and-khugepaged_scan_shmem.patch added to -mm tree

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The patch titled
     Subject: khugepaged: rename collapse_shmem() and khugepaged_scan_shmem()
has been added to the -mm tree.  Its filename is
     khugepaged-rename-collapse_shmem-and-khugepaged_scan_shmem.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/khugepaged-rename-collapse_shmem-and-khugepaged_scan_shmem.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/khugepaged-rename-collapse_shmem-and-khugepaged_scan_shmem.patch

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------------------------------------------------------
From: Song Liu <songliubraving@xxxxxx>
Subject: khugepaged: rename collapse_shmem() and khugepaged_scan_shmem()

Next patch will add khugepaged support of non-shmem files.  This patch
renames these two functions to reflect the new functionality:

    collapse_shmem()        =>  collapse_file()
    khugepaged_scan_shmem() =>  khugepaged_scan_file()

Link: http://lkml.kernel.org/r/20190801184244.3169074-6-songliubraving@xxxxxx
Signed-off-by: Song Liu <songliubraving@xxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Hillf Danton <hdanton@xxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: William Kucharski <william.kucharski@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/khugepaged.c |   23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

--- a/mm/khugepaged.c~khugepaged-rename-collapse_shmem-and-khugepaged_scan_shmem
+++ a/mm/khugepaged.c
@@ -1426,7 +1426,7 @@ static void retract_page_tables(struct a
 }
 
 /**
- * collapse_shmem - collapse small tmpfs/shmem pages into huge one.
+ * collapse_file - collapse small tmpfs/shmem pages into huge one.
  *
  * Basic scheme is simple, details are more complex:
  *  - allocate and lock a new huge page;
@@ -1443,10 +1443,11 @@ static void retract_page_tables(struct a
  *    + restore gaps in the page cache;
  *    + unlock and free huge page;
  */
-static void collapse_shmem(struct mm_struct *mm,
-		struct address_space *mapping, pgoff_t start,
+static void collapse_file(struct mm_struct *mm,
+		struct file *file, pgoff_t start,
 		struct page **hpage, int node)
 {
+	struct address_space *mapping = file->f_mapping;
 	gfp_t gfp;
 	struct page *new_page;
 	struct mem_cgroup *memcg;
@@ -1702,11 +1703,11 @@ out:
 	/* TODO: tracepoints */
 }
 
-static void khugepaged_scan_shmem(struct mm_struct *mm,
-		struct address_space *mapping,
-		pgoff_t start, struct page **hpage)
+static void khugepaged_scan_file(struct mm_struct *mm,
+		struct file *file, pgoff_t start, struct page **hpage)
 {
 	struct page *page = NULL;
+	struct address_space *mapping = file->f_mapping;
 	XA_STATE(xas, &mapping->i_pages, start);
 	int present, swap;
 	int node = NUMA_NO_NODE;
@@ -1770,16 +1771,15 @@ static void khugepaged_scan_shmem(struct
 			result = SCAN_EXCEED_NONE_PTE;
 		} else {
 			node = khugepaged_find_target_node();
-			collapse_shmem(mm, mapping, start, hpage, node);
+			collapse_file(mm, file, start, hpage, node);
 		}
 	}
 
 	/* TODO: tracepoints */
 }
 #else
-static void khugepaged_scan_shmem(struct mm_struct *mm,
-		struct address_space *mapping,
-		pgoff_t start, struct page **hpage)
+static void khugepaged_scan_file(struct mm_struct *mm,
+		struct file *file, pgoff_t start, struct page **hpage)
 {
 	BUILD_BUG();
 }
@@ -1862,8 +1862,7 @@ skip:
 				file = get_file(vma->vm_file);
 				up_read(&mm->mmap_sem);
 				ret = 1;
-				khugepaged_scan_shmem(mm, file->f_mapping,
-						pgoff, hpage);
+				khugepaged_scan_file(mm, file, pgoff, hpage);
 				fput(file);
 			} else {
 				ret = khugepaged_scan_pmd(mm, vma,
_

Patches currently in -mm which might be from songliubraving@xxxxxx are

mm-move-memcmp_pages-and-pages_identical.patch
uprobe-use-original-page-when-all-uprobes-are-removed.patch
uprobe-use-original-page-when-all-uprobes-are-removed-v2.patch
mm-thp-introduce-foll_split_pmd.patch
mm-thp-introduce-foll_split_pmd-v11.patch
uprobe-use-foll_split_pmd-instead-of-foll_split.patch
khugepaged-enable-collapse-pmd-for-pte-mapped-thp.patch
uprobe-collapse-thp-pmd-after-removing-all-uprobes.patch
filemap-check-compound_headpage-mapping-in-filemap_fault.patch
filemap-check-compound_headpage-mapping-in-pagecache_get_page.patch
filemap-update-offset-check-in-filemap_fault.patch
mmthp-stats-for-file-backed-thp.patch
khugepaged-rename-collapse_shmem-and-khugepaged_scan_shmem.patch
mmthp-add-read-only-thp-support-for-non-shmem-fs.patch
mmthp-avoid-writes-to-file-with-thp-in-pagecache.patch




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