commit 8f92bf0e930eaf2bcb0478f0c6f40dad001391e1
Author: Erez Zadok <[EMAIL PROTECTED]>
Date: Thu Jan 10 07:03:42 2008 -0500
Unionfs: set our superblock a/m/ctime granularity
Set it to 1 ns, because we could be stacked on top of file systems with such
granularity.
Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>
diff --git a/fs/unionfs/main.c b/fs/unionfs/main.c
index 9371c2e..e0ebca8 100644
--- a/fs/unionfs/main.c
+++ b/fs/unionfs/main.c
@@ -732,6 +732,13 @@ static int unionfs_read_super(struct super_block *sb, void
*raw_data,
/* max Bytes is the maximum bytes from highest priority branch */
sb->s_maxbytes = unionfs_lower_super_idx(sb, 0)->s_maxbytes;
+ /*
+ * Our c/m/atime granularity is 1 ns because we may stack on file
+ * systems whose granularity is as good. This is important for our
+ * time-based cache coherency.
+ */
+ sb->s_time_gran = 1;
+
sb->s_op = &unionfs_sops;
init_export_op(sb);
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