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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-07-05 13:00:08 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-07-23 10:02:12 +0900
commit773bc4f3b6898634a80a41c72a1f34cb89992dcd (patch)
treeee6f12c0fbfa959a79861904498d04db8d899cc2 /Documentation/filesystems
parent325020477a51ffa849418b3e38189fd266f2ae20 (diff)
downloadop-kernel-dev-773bc4f3b6898634a80a41c72a1f34cb89992dcd.zip
op-kernel-dev-773bc4f3b6898634a80a41c72a1f34cb89992dcd.tar.gz
nilfs2: add barrier mount option
Nilfs enables write barriers by default and has "nobarrier" mount option to disable this feature. But it lacks the complementary option and has no way to re-enable the feature on remount. This adds "barrier" option to resolve this imbalance. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/nilfs2.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt
index d3e7673..54f61c0 100644
--- a/Documentation/filesystems/nilfs2.txt
+++ b/Documentation/filesystems/nilfs2.txt
@@ -49,7 +49,10 @@ Mount options
NILFS2 supports the following mount options:
(*) == default
-nobarrier Disables barriers.
+barrier(*) This enables/disables the use of write barriers. This
+nobarrier requires an IO stack which can support barriers, and
+ if nilfs gets an error on a barrier write, it will
+ disable again with a warning.
errors=continue Keep going on a filesystem error.
errors=remount-ro(*) Remount the filesystem read-only on an error.
errors=panic Panic and halt the machine if an error occurs.
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