On Fri, Feb 15, 2008 at 08:51:15PM +0900, Takashi Sato wrote: > So XFS_IOC_FREEZE and XFS_IOC_THAW cannot be lifted to generic code simply. > I think we should create new generic numbers for freeze and thaw Actually we've lifted specific ioctls to the generic layer before all the time in drivers. That's the only way to make functionality that was specific to a single driver (or in this case filesystem) generic. If the numbering issues confuses you make sure to add a big comment describing it > And xfs_freeze calls XFS_IOC_FREEZE with a magic number 1, but what is 1? As Eric said it's ignored. > Instead, I'd like the sec to timeout on freeze API in order to thaw > the filesystem automatically. It can prevent a filesystem from staying > frozen forever. > (Because a freezer may cause a deadlock by accessing the frozen filesystem.) Timeout based locking is generally a horrible idea, there's a reason we don't have any primitives for that in the kernel :) - 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
