Re: [RFC][PATCH 06/10] cifs: define inode-level cache object and register them

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, 25 Jun 2010 22:46:38 +0100
David Howells <dhowells@xxxxxxxxxx> wrote:

> Jeff Layton <jlayton@xxxxxxxxx> wrote:
> 
> > Looks like it mostly uses the ctime. IMO, the mtime would be a better
> > choice since it changes less frequently, but I don't guess that it
> > matters very much.
> 
> I'd've thought mtime changes more frequently since that's altered when data is
> written.  ctime is changed when attributes are changed.
> 

IIUC, updating mtime for a write is also an attribute change, and that
affects ctime. According to the stat(2) manpage:

       The field st_ctime is changed by writing or by setting  inode  informa-
       tion (i.e., owner, group, link count, mode, etc.).

> Note that Ext4 appears to have a file creation time field in its inode
> (struct ext4_inode::i_crtime[_extra]).  Can Samba be made to use that?
> 

Is it exposed to userspace in any (standard) way? It would be handy to
have that. While we're wishing...it might also be nice to have a
standard way to get at the i_generation from userspace too.

-- 
Jeff Layton <jlayton@xxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux