Files
tegra-linux-noble/include/linux
KAMEZAWA Hiroyuki 887032670d cgroup avoid permanent sleep at rmdir
After commit ec64f51545 ("cgroup: fix
frequent -EBUSY at rmdir"), cgroup's rmdir (especially against memcg)
doesn't return -EBUSY by temporary ref counts.  That commit expects all
refs after pre_destroy() is temporary but...it wasn't.  Then, rmdir can
wait permanently.  This patch tries to fix that and change followings.

 - set CGRP_WAIT_ON_RMDIR flag before pre_destroy().
 - clear CGRP_WAIT_ON_RMDIR flag when the subsys finds racy case.
   if there are sleeping ones, wakes them up.
 - rmdir() sleeps only when CGRP_WAIT_ON_RMDIR flag is set.

Tested-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Reported-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Reviewed-by: Paul Menage <menage@google.com>
Acked-by: Balbir Sigh <balbir@linux.vnet.ibm.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-29 19:10:35 -07:00
..
2009-06-17 19:41:52 +02:00
2009-06-22 16:56:22 -07:00
2009-06-18 08:46:47 +10:00
2009-06-30 18:56:00 -07:00
2009-07-12 12:22:34 -07:00
2009-06-17 00:36:36 -04:00
2009-06-30 18:55:58 -07:00
2009-06-11 21:36:09 -04:00
2009-07-29 19:10:35 -07:00
2009-06-22 10:12:35 +01:00
2009-07-12 12:22:34 -07:00
2009-06-11 08:50:57 -07:00
2009-06-11 21:36:06 -04:00
2009-07-12 13:02:10 -07:00
2009-06-22 10:12:30 +01:00
2009-06-22 10:12:35 +01:00
2009-06-17 09:33:49 -07:00
2009-07-08 09:18:05 -07:00
2009-06-24 08:17:04 -04:00
2009-06-30 18:56:00 -07:00
2009-06-15 21:30:25 -07:00
2009-06-24 08:15:27 -04:00
2009-06-18 18:40:18 -04:00
2009-06-30 20:12:24 +02:00
2009-06-18 13:04:05 -07:00
2009-07-12 12:22:34 -07:00
2009-06-29 08:59:10 +10:00
2009-06-18 13:03:57 -07:00
2009-06-18 13:03:56 -07:00
2009-06-22 10:12:35 +01:00
2009-06-15 15:49:23 +02:00
2009-06-10 11:48:39 +03:00
2009-06-23 20:21:39 +01:00
2009-07-17 21:47:44 +09:30
2009-07-28 21:07:09 -04:00
2009-06-16 19:47:57 -07:00
2009-06-16 19:47:48 -07:00
2009-06-16 08:40:20 +02:00
2009-06-11 19:05:32 +02:00
2009-06-16 19:50:13 -07:00
2009-06-25 11:22:13 -07:00
2009-07-08 09:31:56 -07:00
2009-06-18 13:03:57 -07:00
2009-06-11 21:36:02 -04:00
2009-06-11 21:36:01 -04:00
2009-06-17 18:02:11 -07:00
2009-06-17 18:02:11 -07:00
2009-06-17 12:24:34 -07:00
2009-06-17 12:24:34 -07:00
2009-06-17 18:02:11 -07:00
2009-06-15 21:44:43 -07:00
2009-06-29 12:14:51 -07:00
2009-06-30 18:55:59 -07:00
2009-06-18 13:04:04 -07:00
2009-06-18 13:04:04 -07:00
2009-06-11 21:36:12 -04:00
2009-07-12 12:22:34 -07:00
2009-06-24 08:17:06 -04:00
2009-06-11 08:50:58 -07:00
2009-06-24 08:17:06 -04:00
2009-06-15 15:50:49 +02:00
2009-06-16 19:47:48 -07:00
2009-06-23 12:50:05 -07:00
2009-07-06 13:57:03 -07:00
2009-06-11 08:50:59 -07:00
2009-07-12 15:16:39 -07:00
2009-07-17 21:47:47 +09:30