[PATCHv6 21/22] thp, mm: split huge page on mmap file page
From: Kirill A. Shutemov <hidden>
Date: 2013-09-23 12:05:49
Also in:
linux-fsdevel, lkml
Subsystem:
memory management, page cache, the rest · Maintainers:
Andrew Morton, Matthew Wilcox, Jan Kara, Linus Torvalds
We are not ready to mmap file-backed tranparent huge pages. Let's split them on fault attempt. Later we'll implement mmap() properly and this code path be used for fallback cases. Signed-off-by: Kirill A. Shutemov <redacted> --- mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/mm/filemap.c b/mm/filemap.c
index 9bbc024e4c..01a8f9945a 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -1736,6 +1736,8 @@ retry_find: goto no_cached_page; } + if (PageTransCompound(page)) + split_huge_page(compound_trans_head(page)); if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) { page_cache_release(page); return ret | VM_FAULT_RETRY;
--
1.8.4.rc3
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