2011-11-30 12:18:14 +01:00
|
|
|
/* drivers/misc/lowmemorykiller.c
|
|
|
|
*
|
|
|
|
* The lowmemorykiller driver lets user-space specify a set of memory thresholds
|
2012-02-14 04:28:49 +01:00
|
|
|
* where processes with a range of oom_score_adj values will get killed. Specify
|
|
|
|
* the minimum oom_score_adj values in
|
|
|
|
* /sys/module/lowmemorykiller/parameters/adj and the number of free pages in
|
|
|
|
* /sys/module/lowmemorykiller/parameters/minfree. Both files take a comma
|
|
|
|
* separated list of numbers in ascending order.
|
2011-11-30 12:18:14 +01:00
|
|
|
*
|
|
|
|
* For example, write "0,8" to /sys/module/lowmemorykiller/parameters/adj and
|
2011-12-22 13:28:23 +01:00
|
|
|
* "1024,4096" to /sys/module/lowmemorykiller/parameters/minfree to kill
|
2012-02-14 04:28:49 +01:00
|
|
|
* processes with a oom_score_adj value of 8 or higher when the free memory
|
|
|
|
* drops below 4096 pages and kill processes with a oom_score_adj value of 0 or
|
|
|
|
* higher when the free memory drops below 1024 pages.
|
2011-11-30 12:18:14 +01:00
|
|
|
*
|
|
|
|
* The driver considers memory used for caches to be free, but if a large
|
|
|
|
* percentage of the cached memory is locked this can be very inaccurate
|
|
|
|
* and processes may not get killed until the normal oom killer is triggered.
|
|
|
|
*
|
|
|
|
* Copyright (C) 2007-2008 Google, Inc.
|
|
|
|
*
|
|
|
|
* This software is licensed under the terms of the GNU General Public
|
|
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
|
|
* may be copied, distributed, and modified under those terms.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2013-03-16 08:37:26 +01:00
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
|
2011-11-30 12:18:14 +01:00
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <linux/oom.h>
|
|
|
|
#include <linux/sched.h>
|
2013-02-27 07:07:35 +01:00
|
|
|
#include <linux/swap.h>
|
2012-02-06 17:29:41 +01:00
|
|
|
#include <linux/rcupdate.h>
|
2010-05-05 20:38:42 +02:00
|
|
|
#include <linux/profile.h>
|
|
|
|
#include <linux/notifier.h>
|
2011-11-30 12:18:14 +01:00
|
|
|
|
2013-02-27 07:07:36 +01:00
|
|
|
static uint32_t lowmem_debug_level = 1;
|
2012-12-12 01:02:54 +01:00
|
|
|
static short lowmem_adj[6] = {
|
2011-11-30 12:18:14 +01:00
|
|
|
0,
|
|
|
|
1,
|
|
|
|
6,
|
|
|
|
12,
|
|
|
|
};
|
|
|
|
static int lowmem_adj_size = 4;
|
2012-03-07 22:21:23 +01:00
|
|
|
static int lowmem_minfree[6] = {
|
2011-11-30 12:18:14 +01:00
|
|
|
3 * 512, /* 6MB */
|
|
|
|
2 * 1024, /* 8MB */
|
|
|
|
4 * 1024, /* 16MB */
|
|
|
|
16 * 1024, /* 64MB */
|
|
|
|
};
|
|
|
|
static int lowmem_minfree_size = 4;
|
|
|
|
|
2012-01-13 19:21:25 +01:00
|
|
|
static unsigned long lowmem_deathpending_timeout;
|
2010-05-05 20:38:42 +02:00
|
|
|
|
2011-11-30 12:18:14 +01:00
|
|
|
#define lowmem_print(level, x...) \
|
|
|
|
do { \
|
|
|
|
if (lowmem_debug_level >= (level)) \
|
2013-03-16 08:37:26 +01:00
|
|
|
pr_info(x); \
|
2011-11-30 12:18:14 +01:00
|
|
|
} while (0)
|
|
|
|
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
static unsigned long lowmem_count(struct shrinker *s,
|
|
|
|
struct shrink_control *sc)
|
|
|
|
{
|
|
|
|
return global_page_state(NR_ACTIVE_ANON) +
|
|
|
|
global_page_state(NR_ACTIVE_FILE) +
|
|
|
|
global_page_state(NR_INACTIVE_ANON) +
|
|
|
|
global_page_state(NR_INACTIVE_FILE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned long lowmem_scan(struct shrinker *s, struct shrink_control *sc)
|
2011-11-30 12:18:14 +01:00
|
|
|
{
|
2012-02-06 17:29:47 +01:00
|
|
|
struct task_struct *tsk;
|
2011-11-30 12:18:14 +01:00
|
|
|
struct task_struct *selected = NULL;
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
unsigned long rem = 0;
|
2011-11-30 12:18:14 +01:00
|
|
|
int tasksize;
|
|
|
|
int i;
|
2012-12-12 01:02:54 +01:00
|
|
|
short min_score_adj = OOM_SCORE_ADJ_MAX + 1;
|
2011-11-30 12:18:14 +01:00
|
|
|
int selected_tasksize = 0;
|
2012-12-12 01:02:54 +01:00
|
|
|
short selected_oom_score_adj;
|
2011-11-30 12:18:14 +01:00
|
|
|
int array_size = ARRAY_SIZE(lowmem_adj);
|
2013-02-27 07:07:35 +01:00
|
|
|
int other_free = global_page_state(NR_FREE_PAGES) - totalreserve_pages;
|
2010-11-24 02:29:04 +01:00
|
|
|
int other_file = global_page_state(NR_FILE_PAGES) -
|
2014-02-26 20:06:22 +01:00
|
|
|
global_page_state(NR_SHMEM) -
|
|
|
|
total_swapcache_pages();
|
2011-11-30 12:18:14 +01:00
|
|
|
|
|
|
|
if (lowmem_adj_size < array_size)
|
|
|
|
array_size = lowmem_adj_size;
|
|
|
|
if (lowmem_minfree_size < array_size)
|
|
|
|
array_size = lowmem_minfree_size;
|
|
|
|
for (i = 0; i < array_size; i++) {
|
|
|
|
if (other_free < lowmem_minfree[i] &&
|
|
|
|
other_file < lowmem_minfree[i]) {
|
2012-02-14 04:28:49 +01:00
|
|
|
min_score_adj = lowmem_adj[i];
|
2011-11-30 12:18:14 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
|
|
|
|
lowmem_print(3, "lowmem_scan %lu, %x, ofree %d %d, ma %hd\n",
|
|
|
|
sc->nr_to_scan, sc->gfp_mask, other_free,
|
|
|
|
other_file, min_score_adj);
|
|
|
|
|
|
|
|
if (min_score_adj == OOM_SCORE_ADJ_MAX + 1) {
|
|
|
|
lowmem_print(5, "lowmem_scan %lu, %x, return 0\n",
|
|
|
|
sc->nr_to_scan, sc->gfp_mask);
|
|
|
|
return 0;
|
2011-11-30 12:18:14 +01:00
|
|
|
}
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
|
2012-02-14 04:28:49 +01:00
|
|
|
selected_oom_score_adj = min_score_adj;
|
2011-11-30 12:18:14 +01:00
|
|
|
|
2012-02-06 17:29:41 +01:00
|
|
|
rcu_read_lock();
|
2012-02-06 17:29:47 +01:00
|
|
|
for_each_process(tsk) {
|
|
|
|
struct task_struct *p;
|
2012-12-12 01:02:54 +01:00
|
|
|
short oom_score_adj;
|
2011-11-30 12:18:14 +01:00
|
|
|
|
2012-02-06 17:30:01 +01:00
|
|
|
if (tsk->flags & PF_KTHREAD)
|
2011-11-30 12:18:14 +01:00
|
|
|
continue;
|
2012-02-06 17:30:01 +01:00
|
|
|
|
2012-02-06 17:29:47 +01:00
|
|
|
p = find_lock_task_mm(tsk);
|
|
|
|
if (!p)
|
|
|
|
continue;
|
|
|
|
|
2012-04-10 01:56:18 +02:00
|
|
|
if (test_tsk_thread_flag(p, TIF_MEMDIE) &&
|
|
|
|
time_before_eq(jiffies, lowmem_deathpending_timeout)) {
|
|
|
|
task_unlock(p);
|
|
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
|
|
}
|
2012-02-14 04:28:49 +01:00
|
|
|
oom_score_adj = p->signal->oom_score_adj;
|
|
|
|
if (oom_score_adj < min_score_adj) {
|
2011-11-30 12:18:14 +01:00
|
|
|
task_unlock(p);
|
|
|
|
continue;
|
|
|
|
}
|
2012-02-06 17:29:47 +01:00
|
|
|
tasksize = get_mm_rss(p->mm);
|
2011-11-30 12:18:14 +01:00
|
|
|
task_unlock(p);
|
|
|
|
if (tasksize <= 0)
|
|
|
|
continue;
|
|
|
|
if (selected) {
|
2012-02-14 04:28:49 +01:00
|
|
|
if (oom_score_adj < selected_oom_score_adj)
|
2011-11-30 12:18:14 +01:00
|
|
|
continue;
|
2012-02-14 04:28:49 +01:00
|
|
|
if (oom_score_adj == selected_oom_score_adj &&
|
2011-11-30 12:18:14 +01:00
|
|
|
tasksize <= selected_tasksize)
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
selected = p;
|
|
|
|
selected_tasksize = tasksize;
|
2012-02-14 04:28:49 +01:00
|
|
|
selected_oom_score_adj = oom_score_adj;
|
2012-12-12 01:02:54 +01:00
|
|
|
lowmem_print(2, "select %d (%s), adj %hd, size %d, to kill\n",
|
2012-02-14 04:28:49 +01:00
|
|
|
p->pid, p->comm, oom_score_adj, tasksize);
|
2011-11-30 12:18:14 +01:00
|
|
|
}
|
|
|
|
if (selected) {
|
2012-12-12 01:02:54 +01:00
|
|
|
lowmem_print(1, "send sigkill to %d (%s), adj %hd, size %d\n",
|
2011-11-30 12:18:14 +01:00
|
|
|
selected->pid, selected->comm,
|
2012-02-14 04:28:49 +01:00
|
|
|
selected_oom_score_adj, selected_tasksize);
|
2012-01-13 19:21:25 +01:00
|
|
|
lowmem_deathpending_timeout = jiffies + HZ;
|
2015-02-12 00:26:12 +01:00
|
|
|
/*
|
|
|
|
* FIXME: lowmemorykiller shouldn't abuse global OOM killer
|
|
|
|
* infrastructure. There is no real reason why the selected
|
|
|
|
* task should have access to the memory reserves.
|
|
|
|
*/
|
|
|
|
mark_tsk_oom_victim(selected);
|
2014-02-14 07:03:56 +01:00
|
|
|
send_sig(SIGKILL, selected, 0);
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
rem += selected_tasksize;
|
2011-11-30 12:18:14 +01:00
|
|
|
}
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
|
|
|
|
lowmem_print(4, "lowmem_scan %lu, %x, return %lu\n",
|
2011-06-23 01:05:47 +02:00
|
|
|
sc->nr_to_scan, sc->gfp_mask, rem);
|
2012-02-06 17:29:41 +01:00
|
|
|
rcu_read_unlock();
|
2011-11-30 12:18:14 +01:00
|
|
|
return rem;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct shrinker lowmem_shrinker = {
|
drivers: convert shrinkers to new count/scan API
Convert the driver shrinkers to the new API. Most changes are compile
tested only because I either don't have the hardware or it's staging
stuff.
FWIW, the md and android code is pretty good, but the rest of it makes me
want to claw my eyes out. The amount of broken code I just encountered is
mind boggling. I've added comments explaining what is broken, but I fear
that some of the code would be best dealt with by being dragged behind the
bike shed, burying in mud up to it's neck and then run over repeatedly
with a blunt lawn mower.
Special mention goes to the zcache/zcache2 drivers. They can't co-exist
in the build at the same time, they are under different menu options in
menuconfig, they only show up when you've got the right set of mm
subsystem options configured and so even compile testing is an exercise in
pulling teeth. And that doesn't even take into account the horrible,
broken code...
[glommer@openvz.org: fixes for i915, android lowmem, zcache, bcache]
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-08-28 02:18:11 +02:00
|
|
|
.scan_objects = lowmem_scan,
|
|
|
|
.count_objects = lowmem_count,
|
2011-11-30 12:18:14 +01:00
|
|
|
.seeks = DEFAULT_SEEKS * 16
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init lowmem_init(void)
|
|
|
|
{
|
|
|
|
register_shrinker(&lowmem_shrinker);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit lowmem_exit(void)
|
|
|
|
{
|
|
|
|
unregister_shrinker(&lowmem_shrinker);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_param_named(cost, lowmem_shrinker.seeks, int, S_IRUGO | S_IWUSR);
|
2012-12-12 01:02:54 +01:00
|
|
|
module_param_array_named(adj, lowmem_adj, short, &lowmem_adj_size,
|
2011-11-30 12:18:14 +01:00
|
|
|
S_IRUGO | S_IWUSR);
|
|
|
|
module_param_array_named(minfree, lowmem_minfree, uint, &lowmem_minfree_size,
|
|
|
|
S_IRUGO | S_IWUSR);
|
|
|
|
module_param_named(debug_level, lowmem_debug_level, uint, S_IRUGO | S_IWUSR);
|
|
|
|
|
|
|
|
module_init(lowmem_init);
|
|
|
|
module_exit(lowmem_exit);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|