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The attached patch ensures that if NOATIME is set for a filesystem,
then all files from that filesystem do not have atime recording.
[The current code fails when a remount is done which turns on
the NOATIME flag, then all files which are open, or which are still
in the inode cache, remain with atime recording.]
There is no performance change in normal use from this fix.
Philip
-- Philip Gladstone +1 781 530 2461 Raptor Systems / Axent Technologies Waltham, MA http://www.raptor.com/ --------------94DF09BEC11D25DCD52EF84F Content-Type: text/plain; charset=us-ascii; name="p9_noatimefs.rpf" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="p9_noatimefs.rpf"--- linux/include/linux/fs.h.zz Fri Sep 11 16:11:37 1998 +++ linux/include/linux/fs.h Fri Sep 11 16:11:01 1998 @@ -107,8 +107,11 @@ #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE) #define IS_NOATIME(inode) ((inode)->i_flags & MS_NOATIME) +/* We don't do ATIME if the file system is RDONLY or NOATIME, OR the file is NOATIME */ +#define IS_NOATIMEFS(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & (MS_NOATIME|MS_RDONLY))) + #define UPDATE_ATIME(inode) \ - if (!IS_NOATIME(inode) && !IS_RDONLY(inode)) { \ + if (!IS_NOATIME(inode) && !IS_NOATIMEFS(inode)) { \ inode->i_atime = CURRENT_TIME; \ inode->i_dirt = 1; \ }
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