On Sat, Jun 02, 2012 at 12:30:14AM +0200, Jan Kara wrote: > Hello, > > here is the sixth iteration of my patches to improve filesystem freezing. > The change since last iteration is that filesystem can be frozen with open but > unlinked files. After some thinking, I've decided that the best way to handle > this is to block removal inside ->evict_inode() of each filesystem and use > fs-internal level of freeze protection for that (usually I've instrumented > filesystem's transaction system to use freeze protection). Handling > inside VFS would be less work but the only level of freeze protection that > has a chance of not causing deadlocks is the one used for page faults and even > there it's not clear lock ordering would be correct wrt some fs-specific locks. > I've converted ext2, ext4, btrfs, xfs, nilfs2, ocfs2, gfs2 and also checked > that ext3, reiserfs, jfs should work as well (they have their internal freeze > protection mechanisms, possibly they could be replaced by a generic one but > given these are mostly aging filesystems, it's not a real priority IHMO). > So finally I'm not aware of any pending issue with this patch set so if you > have some concern, please speak up! Could you rebase on top of e.g. -rc2 and repost? -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
