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| author | Matthew Wilcox | 2019-05-14 02:16:44 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2019-05-14 18:47:45 +0200 |
| commit | 5fd4ca2d84b249f0858ce28cf637cf25b61a398f (patch) | |
| tree | a7660b8f5f9fa02945070e2ab918eb645c92ba36 /mm/khugepaged.c | |
| parent | userfaultfd/sysctl: add vm.unprivileged_userfaultfd (diff) | |
| download | kernel-qcow2-linux-5fd4ca2d84b249f0858ce28cf637cf25b61a398f.tar.gz kernel-qcow2-linux-5fd4ca2d84b249f0858ce28cf637cf25b61a398f.tar.xz kernel-qcow2-linux-5fd4ca2d84b249f0858ce28cf637cf25b61a398f.zip | |
mm: page cache: store only head pages in i_pages
Transparent Huge Pages are currently stored in i_pages as pointers to
consecutive subpages. This patch changes that to storing consecutive
pointers to the head page in preparation for storing huge pages more
efficiently in i_pages.
Large parts of this are "inspired" by Kirill's patch
https://lore.kernel.org/lkml/20170126115819.58875-2-kirill.shutemov@linux.intel.com/
[willy@infradead.org: fix swapcache pages]
Link: http://lkml.kernel.org/r/20190324155441.GF10344@bombadil.infradead.org
[kirill@shutemov.name: hugetlb stores pages in page cache differently]
Link: http://lkml.kernel.org/r/20190404134553.vuvhgmghlkiw2hgl@kshutemo-mobl1
Link: http://lkml.kernel.org/r/20190307153051.18815-1-willy@infradead.org
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Jan Kara <jack@suse.cz>
Reviewed-by: Kirill Shutemov <kirill@shutemov.name>
Reviewed-and-tested-by: Song Liu <songliubraving@fb.com>
Tested-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Tested-by: Qian Cai <cai@lca.pw>
Cc: Hugh Dickins <hughd@google.com>
Cc: Song Liu <liu.song.a23@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/khugepaged.c')
| -rw-r--r-- | mm/khugepaged.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 449044378782..7ba7a1e4fa79 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1374,7 +1374,7 @@ static void collapse_shmem(struct mm_struct *mm, result = SCAN_FAIL; goto xa_locked; } - xas_store(&xas, new_page + (index % HPAGE_PMD_NR)); + xas_store(&xas, new_page); nr_none++; continue; } @@ -1450,7 +1450,7 @@ static void collapse_shmem(struct mm_struct *mm, list_add_tail(&page->lru, &pagelist); /* Finally, replace with the new page. */ - xas_store(&xas, new_page + (index % HPAGE_PMD_NR)); + xas_store(&xas, new_page); continue; out_unlock: unlock_page(page); |