[PATCHv2 17/41] filemap: handle huge pages in filemap_fdatawait_range()
From: Kirill A. Shutemov <hidden>
Date: 2016-08-12 18:38:00
Also in:
linux-ext4, linux-fsdevel, linux-mm, lkml
Subsystem:
memory management, page cache, the rest · Maintainers:
Andrew Morton, Matthew Wilcox, Jan Kara, Linus Torvalds
We writeback whole huge page a time. Signed-off-by: Kirill A. Shutemov <redacted> --- mm/filemap.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/mm/filemap.c b/mm/filemap.c
index 93fa97f143ab..429f9a0962b3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -372,9 +372,14 @@ static int __filemap_fdatawait_range(struct address_space *mapping, if (page->index > end) continue; + page = compound_head(page); wait_on_page_writeback(page); if (TestClearPageError(page)) ret = -EIO; + if (PageTransHuge(page)) { + index = page->index + HPAGE_PMD_NR; + i += index - pvec.pages[i]->index - 1; + } } pagevec_release(&pvec); cond_resched();
--
2.8.1