On Mon, Nov 5, 2012 at 4:28 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote: > On Mon, Nov 05, 2012 at 10:35:50AM +0800, Zhi Yong Wu wrote: >> On Sat, Nov 3, 2012 at 5:27 AM, Mingming.cao <cmm@xxxxxxxxxx> wrote: >> > On Fri, 2012-11-02 at 14:38 +0800, Zhi Yong Wu wrote: >> >> Here also has another question. >> >> >> >> How to save the file temperature among the umount to be able to >> >> preserve the file tempreture after reboot? >> >> >> >> This above is the requirement from DB product. >> >> I thought that we can save file temperature in its inode struct, that >> >> is, add one new field in struct inode, then this info will be written >> >> to disk with inode. >> >> >> >> Any comments or ideas are appreciated, thanks. >> >> >> >> >> > >> > Maybe could save the last file temperature with extended attributes. >> It seems that only ext4 has the concept of extended attributes. > > All major filesystems have xattr support. They are used extensively > by the security and integrity subsystems, for example. got it, thanks. > > Saving the information might be something that is useful to certian > applications, but lets have the people that need that functionality > spell out their requirements before discussing how or what to > implement. Indeed, discussion shoul dreally focus on getting the > core, in-memory infrastructure sorted out first before trying to > expand the functionality further... ah, but the latest patchset need some love from experienced FS guys:)....... > > Cheers, > > Dave. > -- > Dave Chinner > david@xxxxxxxxxxxxx -- Regards, Zhi Yong Wu -- 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
