• Tejun Heo's avatar
    writeback: let balance_dirty_pages() work on the matching cgroup bdi_writeback · dfb8ae56
    Tejun Heo authored
    Currently, balance_dirty_pages() always work on bdi->wb.  This patch
    updates it to work on the wb (bdi_writeback) matching memcg and blkcg
    of the current task as that's what the inode is being dirtied against.
    balance_dirty_pages_ratelimited() now pins the current wb and passes
    it to balance_dirty_pages().
    As no filesystem has FS_CGROUP_WRITEBACK yet, this doesn't lead to
    visible behavior differences.
    v2: Updated for per-inode wb association.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Cc: Jens Axboe <axboe@kernel.dk>
    Cc: Jan Kara <jack@suse.cz>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
page-writeback.c 75.7 KB