Messages in this thread Patch in this message | | | From | Erez Zadok <> | Subject | [PATCH 23/30] Unionfs: set our superblock a/m/ctime granularity | Date | Fri, 28 Dec 2007 15:42:57 -0500 |
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Set it to 1 ns, because we could be stacked on top of file systems with such granularity.
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> --- fs/unionfs/main.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/fs/unionfs/main.c b/fs/unionfs/main.c index 92f0e9d..23c18f7 100644 --- a/fs/unionfs/main.c +++ b/fs/unionfs/main.c @@ -642,6 +642,13 @@ 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; /* See comment next to the definition of unionfs_d_alloc_root */ -- 1.5.2.2
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