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authorJan Kara <jack@suse.cz>2017-03-23 03:36:57 +0300
committerJens Axboe <axboe@fb.com>2017-03-23 05:11:28 +0300
commit5318ce7d46866e1dbc20ab9349b93753edba0b3e (patch)
tree6a4070a385e86006c64868a2f9bd363ab002cfc8 /include/linux/backing-dev-defs.h
parente8cb72b322cf4a729633b7e2080fbeab477f6ea2 (diff)
downloadlinux-5318ce7d46866e1dbc20ab9349b93753edba0b3e.tar.xz
bdi: Shutdown writeback on all cgwbs in cgwb_bdi_destroy()
Currently we waited for all cgwbs to get freed in cgwb_bdi_destroy() which also means that writeback has been shutdown on them. Since this wait is going away, directly shutdown writeback on cgwbs from cgwb_bdi_destroy() to avoid live writeback structures after bdi_unregister() has finished. To make that safe with concurrent shutdown from cgwb_release_workfn(), we also have to make sure wb_shutdown() returns only after the bdi_writeback structure is really shutdown. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/backing-dev-defs.h')
-rw-r--r--include/linux/backing-dev-defs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index 8fb3dcdebc80..8af720f22a2d 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -21,6 +21,7 @@ struct dentry;
*/
enum wb_state {
WB_registered, /* bdi_register() was done */
+ WB_shutting_down, /* wb_shutdown() in progress */
WB_writeback_running, /* Writeback is in progress */
WB_has_dirty_io, /* Dirty inodes on ->b_{dirty|io|more_io} */
};