Files
android_kernel_xiaomi_sm8450/include/linux
Shakeel Butt f745c6f5fe fs, mm: account buffer_head to kmemcg
The buffer_head can consume a significant amount of system memory and is
directly related to the amount of page cache.  In our production
environment we have observed that a lot of machines are spending a
significant amount of memory as buffer_head and can not be left as
system memory overhead.

Charging buffer_head is not as simple as adding __GFP_ACCOUNT to the
allocation.  The buffer_heads can be allocated in a memcg different from
the memcg of the page for which buffer_heads are being allocated.  One
concrete example is memory reclaim.  The reclaim can trigger I/O of
pages of any memcg on the system.  So, the right way to charge
buffer_head is to extract the memcg from the page for which buffer_heads
are being allocated and then use targeted memcg charging API.

[shakeelb@google.com: use __GFP_ACCOUNT for directed memcg charging]
  Link: http://lkml.kernel.org/r/20180702220208.213380-1-shakeelb@google.com
Link: http://lkml.kernel.org/r/20180627191250.209150-3-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-17 16:20:30 -07:00
..
2018-06-18 21:32:15 +02:00
2018-05-25 18:23:56 +02:00
2018-08-09 14:05:30 -07:00
2018-05-26 09:16:44 +02:00
2018-06-15 18:10:01 -03:00
2018-04-20 17:18:35 -07:00
2018-04-30 13:25:14 +01:00
2018-07-24 14:43:26 -06:00
2018-05-09 17:25:13 +02:00
2018-06-15 18:10:01 -03:00
2018-06-19 10:06:29 -07:00
2018-06-19 10:06:29 -07:00
2018-03-26 15:09:38 +02:00
2018-07-22 14:13:43 +02:00
2018-06-01 07:38:16 -06:00
2018-03-26 15:56:44 +02:00
2018-07-12 10:04:29 -04:00
2018-07-03 18:33:19 -04:00
2018-06-07 17:34:37 -07:00
2018-03-26 08:53:43 -06:00
2018-06-22 13:43:27 +09:00
2018-06-22 13:43:27 +09:00
2018-05-09 12:21:46 -05:00
2018-06-21 17:39:18 +02:00
2018-04-11 10:28:38 -07:00
2018-06-21 12:33:21 +02:00
2018-07-12 21:35:28 +02:00
2018-04-12 09:41:19 -07:00
2018-06-05 08:50:16 -04:00
2018-06-07 17:34:35 -07:00
2018-04-11 10:28:32 -07:00
2018-06-07 17:34:39 -07:00
2018-03-26 13:14:43 -04:00
2018-03-26 13:14:43 -04:00
2018-06-07 17:34:36 -07:00
2018-04-11 10:28:39 -07:00
2018-08-15 14:59:03 -05:00
2018-07-19 11:34:23 +01:00
2018-06-07 17:34:35 -07:00
2018-07-25 13:41:22 -07:00
2018-05-31 00:13:56 +08:00
2018-07-20 01:11:45 +02:00
2018-08-02 17:33:06 -04:00
2018-05-11 17:28:45 -07:00
2018-05-11 17:28:45 -07:00
2018-03-01 08:33:05 -07:00
2018-06-29 08:48:06 -06:00
2018-04-30 05:14:55 -07:00
2018-06-07 17:34:35 -07:00
2018-07-03 09:20:44 +02:00
2018-05-03 15:55:23 -07:00
2018-06-20 11:35:56 +02:00
2018-02-06 18:32:47 -08:00
2018-05-19 13:57:31 +02:00
2018-05-14 09:51:34 -04:00