lkml.org 
[lkml]   [2013]   [Jan]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH, RFC 15/16] thp, mm: split huge page on mmap file page
Date
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>

We are not ready to mmap file-backed tranparent huge pages. Let's split
them on mmap() attempt.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
mm/filemap.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/filemap.c b/mm/filemap.c
index a7331fb..2e08582 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1692,6 +1692,8 @@ retry_find:
goto no_cached_page;
}

+ if (PageTransCompound(page))
+ split_huge_page(page);
if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) {
page_cache_release(page);
return ret | VM_FAULT_RETRY;
--
1.7.10.4


\
 
 \ /
  Last update: 2013-01-28 11:44    [W:0.479 / U:0.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site