linux-kernel - [PATCHv3, RFC 34/34] thp: map file-backed huge pages on fault

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1365163198-29726-35-git-send-email-kirill.shutemov@linux.intel.com>
Date:	Fri,  5 Apr 2013 14:59:58 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Al Viro <viro@...iv.linux.org.uk>, Hugh Dickins <hughd@...gle.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Hillf Danton <dhillf@...il.com>, Dave Hansen <dave@...1.net>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv3, RFC 34/34] thp: map file-backed huge pages on fault

From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>

Look like all pieces are in place, we can map file-backed huge-pages
now.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 include/linux/huge_mm.h |    4 +++-
 mm/memory.c             |    1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index c6e3aef..c175c78 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -80,7 +80,9 @@ extern bool is_vma_temporary_stack(struct vm_area_struct *vma);
 	   (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) &&			\
 	   ((__vma)->vm_flags & VM_HUGEPAGE))) &&			\
 	 !((__vma)->vm_flags & VM_NOHUGEPAGE) &&			\
-	 !is_vma_temporary_stack(__vma))
+	 !is_vma_temporary_stack(__vma) &&				\
+	 (!(__vma)->vm_ops ||						\
+		  mapping_can_have_hugepages((__vma)->vm_file->f_mapping)))
 #define transparent_hugepage_defrag(__vma)				\
 	((transparent_hugepage_flags &					\
 	  (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)) ||			\
diff --git a/mm/memory.c b/mm/memory.c
index 2895f0e..e40965f 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3738,6 +3738,7 @@ retry:
 		if (!vma->vm_ops)
 			return do_huge_pmd_anonymous_page(mm, vma, address,
 							  pmd, flags);
+		return do_huge_linear_fault(mm, vma, address, pmd, flags);
 	} else {
 		pmd_t orig_pmd = *pmd;
 		int ret;
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/