On Mon, Feb 29, 2016 at 03:58:37PM -0500, Tejun Heo wrote: > On Mon, Feb 29, 2016 at 08:54:28PM +0000, Al Viro wrote: > > > This patch removes the problematic super_block pinning and instead > > > makes generic_shutdown_super() flush in-flight wb switches. wb > > > switches are now executed on a dedicated isw_wq so that they can be > > > flushed and isw_nr_in_flight keeps track of the number of in-flight wb > > > switches so that flushing can be avoided in most cases. > > > > Wait a bloody minute. What's to prevent shrink_dcache_for_umount() from > > dirtying more inodes, triggering more of the same? > > Hmmm? The flushing is done after shrink_dcache_for_umount() and > sync_filesystems(). Aren't inodes supposed to stay clean after that?
s/shrink_dcache_for_umount/fsnotify_unmount_inodes/ - sorry.
