Commit 2f6e38f3 authored May 29, 2012 by Hugh Dickins Committed by Linus Torvalds May 29, 2012

tmpfs: enable NOSEC optimization



Let tmpfs into the NOSEC optimization (avoiding file_remove_suid()
overhead on most common writes): set MS_NOSEC on its superblocks.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent bde05d1c

mm/shmem.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2373,6 +2373,7 @@ int shmem_fill_super(struct super_block sb, void data, int silent)
		}
		}
		sb->s_export_op = &shmem_export_ops;
		sb->s_flags \|= MS_NOSEC;
		#else
		sb->s_flags \|= MS_NOUSER;
		#endif