Files
odroid-linux/include/linux
Roman Gushchin f5fbe6b7ad writeback, cgroup: support switching multiple inodes at once
Currently only a single inode can be switched to another writeback
structure at once.  That means to switch an inode a separate
inode_switch_wbs_context structure must be allocated, and a separate rcu
callback and work must be scheduled.

It's fine for the existing ad-hoc switching, which is not happening that
often, but sub-optimal for massive switching required in order to release
a writeback structure.  To prepare for it, let's add a support for
switching multiple inodes at once.

Instead of containing a single inode pointer, inode_switch_wbs_context
will contain a NULL-terminated array of inode pointers.
inode_do_switch_wbs() will be called for each inode.

To optimize the locking bdi->wb_switch_rwsem, old_wb's and new_wb's
list_locks will be acquired and released only once altogether for all
inodes.  wb_wakeup() will be also be called only once.  Instead of calling
wb_put(old_wb) after each successful switch, wb_put_many() is introduced
and used.

Link: https://lkml.kernel.org/r/20210608230225.2078447-8-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dennis Zhou <dennis@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Jan Kara <jack@suse.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-06-29 10:53:48 -07:00
..
2021-02-02 00:16:57 +01:00
2020-12-09 19:26:02 -06:00
2020-06-25 22:25:13 -07:00
2020-06-16 14:19:57 +02:00
2021-01-23 14:57:21 +01:00
2021-05-18 17:24:52 +01:00
2021-05-06 19:24:11 -07:00
2021-04-14 16:30:30 +03:00
2020-05-24 20:48:11 +02:00
2021-05-08 21:49:48 -06:00
2020-09-21 15:00:40 -07:00
2020-12-02 09:46:55 -07:00
2021-01-24 14:27:17 +01:00
2021-02-26 09:41:03 -08:00
2021-04-08 16:04:20 -07:00
2021-05-24 12:45:26 -04:00
2021-05-24 12:45:26 -04:00
2021-04-08 16:04:20 -07:00
2021-04-08 16:04:20 -07:00
2021-01-21 14:06:00 -07:00
2021-05-06 19:24:11 -07:00
2021-04-19 13:13:26 -04:00
2021-01-18 14:26:51 +01:00
2021-03-22 03:57:39 +01:00
2021-02-08 12:28:07 +01:00
2020-12-10 12:42:59 -06:00
2021-04-12 15:04:23 +02:00
2021-03-30 22:37:06 +02:00
2020-11-16 16:31:41 +01:00
2021-05-07 00:26:34 -07:00
2020-11-16 15:20:01 +01:00
2020-07-24 17:12:41 -07:00
2020-11-16 08:14:30 -07:00
2021-02-11 13:24:44 -08:00
2020-08-04 21:02:38 -04:00
2020-12-02 22:10:35 -08:00
2021-04-30 11:20:40 -07:00
2020-11-23 14:16:55 +00:00
2020-09-16 08:54:53 -05:00
2020-05-18 10:30:21 +01:00
2020-11-24 16:47:48 +01:00
2021-03-22 04:23:14 +01:00
2021-04-05 22:39:38 -04:00
2020-06-02 15:15:46 +01:00
2020-12-15 16:19:31 +01:00
2021-01-21 16:16:10 +00:00
2021-02-26 09:41:02 -08:00
2021-02-26 09:41:03 -08:00
2020-09-04 09:25:20 -07:00
2020-05-28 10:31:09 +02:00
2020-09-04 12:46:07 +01:00
2021-04-08 16:04:20 -07:00
2021-01-04 11:42:21 -05:00
2021-04-06 08:34:39 +02:00
2020-07-01 10:49:02 +02:00
2021-02-17 13:17:49 -08:00
2021-04-21 10:24:41 -05:00
2020-07-23 17:34:18 +10:00
2021-02-26 09:40:59 -08:00
2021-02-03 19:05:50 +01:00
2020-08-31 12:52:33 -07:00
2020-10-18 09:27:10 -07:00
2021-01-24 14:27:17 +01:00
2021-01-24 14:27:20 +01:00
2021-03-06 12:40:22 +01:00
2021-02-26 09:41:03 -08:00
2020-12-03 11:20:52 +01:00
2020-08-18 17:06:15 +02:00
2021-03-17 14:16:15 -05:00
2021-01-16 23:19:26 +01:00
2021-03-22 02:45:52 +01:00
2021-03-18 12:58:27 -04:00
2020-12-10 16:17:15 +01:00
2020-12-10 10:45:36 +01:00
2020-09-26 22:55:05 -04:00
2021-05-06 19:24:11 -07:00
2021-03-19 04:58:25 +00:00
2021-03-25 17:39:33 -07:00
2020-10-30 21:57:04 +01:00
2021-01-06 16:24:59 -08:00
2021-03-10 09:34:06 +01:00
2021-04-15 10:32:17 +02:00
2021-02-13 17:17:53 +01:00
2021-03-30 17:06:49 -07:00
2020-11-09 18:39:36 +01:00
2021-04-26 22:55:12 +01:00
2020-07-04 09:35:36 -05:00
2020-09-10 14:03:31 -07:00
2021-04-09 16:00:00 +02:00
2020-08-19 14:13:20 +02:00
2021-01-21 16:16:10 +00:00
2021-03-22 15:02:14 +01:00
2021-06-24 19:40:53 -07:00
2021-02-09 12:15:07 +01:00
2021-01-21 14:06:00 -07:00
2021-04-16 15:31:02 -07:00
2021-03-30 13:42:33 -04:00
2021-01-24 14:27:17 +01:00
2021-02-08 22:58:55 +01:00