tree 74cc93bd420b7bd044e3fd5451c652b3742015e6
parent 7fa07729e439a6184bd824746d06a49cca553f15
author Jan Kara <jack@suse.cz> 1253121768 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1253894904 +0200

fs: Fix busyloop in wb_writeback()

If all inodes are under writeback (e.g. in case when there's only one inode
with dirty pages), wb_writeback() with WB_SYNC_NONE work basically degrades
to busylooping until I_SYNC flags of the inode is cleared. Fix the problem by
waiting on I_SYNC flags of an inode on b_more_io list in case we failed to
write anything.

Tested-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>