On Tue, May 28, 2019 at 10:05:45AM +0200, Jan Kara wrote: > ext4_break_layouts() may fail e.g. due to a signal being delivered. > Thus we need to handle its failure gracefully and not by taking the > filesystem down. Currently ext4_break_layouts() failure is rare but it > may become more common once RDMA uses layout leases for handling > long-term page pins for DAX mappings. > > To handle the failure we need to move ext4_break_layouts() earlier > during setattr handling before we do hard to undo changes such as > modifying inode size. To be able to do that we also have to move some > other checks which are better done without holding i_mmap_sem earlier. > > Reported-and-tested-by: Ira Weiny <ira.weiny@xxxxxxxxx> > Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx> > Signed-off-by: Jan Kara <jack@xxxxxxx> Applied, thanks! - Ted
