On Thu, 27 Jun 2019, Jeff Layton wrote: > On Thu, 2019-06-27 at 14:51 +0100, Luis Henriques wrote: > > Having granularity set to 1us results in having inode timestamps with a > > accurancy different from the fuse client (i.e. atime, ctime and mtime will > > always end with '000'). This patch normalizes this behaviour and sets the > > granularity to 1. > > > > Signed-off-by: Luis Henriques <lhenriques@xxxxxxxx> > > --- > > fs/ceph/super.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > Hi! > > > > As far as I could see there are no other side-effects of changing > > s_time_gran but I'm really not sure why it was initially set to 1000 in > > the first place so I may be missing something. > > > > diff --git a/fs/ceph/super.c b/fs/ceph/super.c > > index d57fa60dcd43..35dd75bc9cd0 100644 > > --- a/fs/ceph/super.c > > +++ b/fs/ceph/super.c > > @@ -980,7 +980,7 @@ static int ceph_set_super(struct super_block *s, void *data) > > s->s_d_op = &ceph_dentry_ops; > > s->s_export_op = &ceph_export_ops; > > > > - s->s_time_gran = 1000; /* 1000 ns == 1 us */ > > + s->s_time_gran = 1; > > > > ret = set_anon_super(s, NULL); /* what is that second arg for? */ > > if (ret != 0) > > > Looks like it was set that way since the client code was originally > merged. Was this an earlier limitation of ceph that is no longer > applicable? > > In any case, I see no need at all to keep this at 1000, so: As long as the encoded on-write time value is at ns resolution, I agree! No recollection of why I did this :( Reviewed-by: Sage Weil <sage@xxxxxxxxxx>
