On Wed, Sep 30, 2009 at 03:49:31PM +0900, Toshiyuki Okajima wrote: > From: Toshiyuki Okajima <toshi.okajima@xxxxxxxxxxxxxx> > > ext4 doesn't log a record of having unmounted the filesystem. And ext4 doesn't > log a record when the filesystem is remounted also with read-only. Therefore > in the system log, we cannot judge whether or not at the certain time this > filesystem user touches it. > For enterprise users, they often want to know when a certain filesystem is > mounted/remounted/unmounted. > > So, we output the message to the system log when the filesystem is > remounted/unmounted. > > Signed-off-by: Toshiyuki Okajima <toshi.okajima@xxxxxxxxxxxxxx> The question of whether this should be at the VFS layer is still an open one, I think. It is true that ext3 and ext4 does print some filesystem specific information, but that could be handled via a new method function in struct super_ops: mount_msg(struct super *sb, char *buf, int buflen) Note by the way that I've made some changes to clean up ext4's mount/umount messages, trying to get rid of excess messages. In fact ext4 already prints a "filesystem mounted" message in ext4_fill_super(). You removed the one in ext4_setup_super(), but I've already removed it in a recent commit pushed to Linus to remove superflous mount-time printk's. I left the one at the very end of ext4_fill_super() in; and your patch adds one about 2/3'rd of the way into ext4_fill_super() --- so two "filesystem mounted" messages would end up getting printed as a result. Did you actually test the patch and see what sort of messages would be printed as a result? - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html