From: Hugh Dickins <hughd@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Andi Kleen <andi@firstfloor.org>,
Al Viro <viro@zeniv.linux.org.uk>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 2/10] tmpfs: enable NOSEC optimization
Date: Sat, 12 May 2012 05:02:29 -0700 (PDT) [thread overview]
Message-ID: <alpine.LSU.2.00.1205120500040.28861@eggly.anvils> (raw)
In-Reply-To: <alpine.LSU.2.00.1205120447380.28861@eggly.anvils>
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>
---
mm/shmem.c | 1 +
1 file changed, 1 insertion(+)
--- 3045N.orig/mm/shmem.c 2012-05-05 10:45:17.888060878 -0700
+++ 3045N/mm/shmem.c 2012-05-05 10:46:05.732062006 -0700
@@ -2361,6 +2361,7 @@ int shmem_fill_super(struct super_block
}
}
sb->s_export_op = &shmem_export_ops;
+ sb->s_flags |= MS_NOSEC;
#else
sb->s_flags |= MS_NOUSER;
#endif
--
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next prev parent reply other threads:[~2012-05-12 12:02 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-12 11:52 [PATCH 0/10] shmem/tmpfs: misc and fallocate Hugh Dickins
2012-05-12 11:59 ` [PATCH 1/10] shmem: replace page if mapping excludes its zone Hugh Dickins
2012-05-14 8:55 ` Cong Wang
2012-05-14 19:42 ` Hugh Dickins
2012-05-15 9:44 ` Cong Wang
2012-05-14 9:06 ` KAMEZAWA Hiroyuki
2012-05-14 23:13 ` Andrew Morton
2012-05-15 4:07 ` Hugh Dickins
2012-05-19 1:41 ` Hugh Dickins
2012-05-19 1:44 ` [PATCH v2 1/10] shmem: substitute " Hugh Dickins
2012-05-12 12:02 ` Hugh Dickins [this message]
2012-05-14 9:35 ` [PATCH 2/10] tmpfs: enable NOSEC optimization Cong Wang
2012-05-14 19:48 ` Hugh Dickins
2012-05-12 12:04 ` [PATCH 3/10] tmpfs: optimize clearing when writing Hugh Dickins
2012-05-15 8:51 ` Nick Piggin
2012-05-12 12:05 ` [PATCH 4/10] tmpfs: support fallocate FALLOC_FL_PUNCH_HOLE Hugh Dickins
2012-05-12 12:13 ` [PATCH 5/10] mm/fs: route MADV_REMOVE to FALLOC_FL_PUNCH_HOLE Hugh Dickins
2012-05-22 0:08 ` john stultz
2012-05-22 15:11 ` Hugh Dickins
2012-05-12 12:15 ` [PATCH 6/10] mm/fs: remove truncate_range Hugh Dickins
2012-05-12 12:17 ` [PATCH 7/10] tmpfs: support fallocate preallocation Hugh Dickins
2012-05-12 12:19 ` [PATCH 8/10] tmpfs: undo fallocation on failure Hugh Dickins
2012-05-12 12:21 ` [PATCH 9/10] tmpfs: quit when fallocate fills memory Hugh Dickins
2012-05-12 12:27 ` [PATCH 10/10] tmpfs: support SEEK_DATA and SEEK_HOLE Hugh Dickins
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