From: Daeho Jeong
We detected the below circular locking dependency between sb_internal
and fs_reclaim. So, removed it by calling dquot_initialize() before
sb_start_intwrite().
==
WARNING: possible circular locking dependency detected
--
when overwrite only first block of cluster, since cluster is not full, it
will call f2fs_write_raw_pages when f2fs_write_multi_pages, and cause the
whole cluster become uncompressed eventhough data can be compressed.
this may will make random write bench score reduce a lot.
root# dd if=/dev/zero o
