tree 6de9774969875cc30c21c96e145294727c56e73b
parent 5443be45f5cb57d02fd895a0bcaf7e7d9890b1df
author Chris Mason <chris.mason@oracle.com> 1218828857 -0400
committer Chris Mason <chris.mason@oracle.com> 1222355046 -0400

Btrfs: Wait for kernel threads to make progress during async submission

Before this change, btrfs would use a bdi congestion function to make
sure there weren't too many pending async checksum work items.

This change makes the process creating async work items wait instead,
leading to fewer congestion returns from the bdi.  This improves
pdflush background_writeout scanning.

Signed-off-by: Chris Mason <chris.mason@oracle.com>