[PATCH 2/2] xfs: kick inode writeback when low on memory

[Christoph Hellwig]

On Thu, Apr 14, 2011 at 03:08:46PM +1000, Dave Chinner wrote:
> Unfortunately, we simply can't take the s_umount lock in reclaim
> context. So further hackery is going to be required here - I think
> that writeback_inodes_sb_nr_if_idle() need to use trylocks. if the
> s_umount lock is taken in write mode, then it's pretty certain that
> the sb is busy....

http://thread.gmane.org/gmane.linux.file-systems/48373/focus=48628