[PATCH 0/2] xfs: write back inodes during reclaim

[Dave Chinner]

This series fixes an OOM problem where VFS-only dirty inodes
accumulate on an XFS filesystem due to atime updates causing OOM to
occur.

The first patch fixes a deadlock triggering bdi-flusher writeback
from memory reclaim when a new bdi-flusher thread needs to be forked
and no memory is available.

the second adds a bdi-flusher kick from XFS's inode cache shrinker
so that when memory is low the VFS starts writing back dirty inodes
so they can be reclaimed as they get cleaned rather than remaining
dirty and pinning the inode cache in memory.