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authorKent Overstreet <kmo@daterainc.com>2014-01-23 12:42:58 (GMT)
committerKent Overstreet <kmo@daterainc.com>2014-03-18 19:22:35 (GMT)
commit3f5e0a34daed197aa55d0c6b466bb4cd03babb4f (patch)
treeb272bd69976053f6ce802c896ec0a14431ee0bed /drivers/md/bcache
parent3f6ef38110b6955327fea3105f004a3b61a3f65f (diff)
downloadlinux-3f5e0a34daed197aa55d0c6b466bb4cd03babb4f.tar.xz
bcache: Kill dead cgroup code
This hasn't been used or even enabled in ages. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md/bcache')
-rw-r--r--drivers/md/bcache/Kconfig8
-rw-r--r--drivers/md/bcache/btree.c4
-rw-r--r--drivers/md/bcache/request.c169
-rw-r--r--drivers/md/bcache/request.h18
-rw-r--r--drivers/md/bcache/stats.c3
5 files changed, 0 insertions, 202 deletions
diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig
index 2638417..4d20088 100644
--- a/drivers/md/bcache/Kconfig
+++ b/drivers/md/bcache/Kconfig
@@ -24,11 +24,3 @@ config BCACHE_CLOSURES_DEBUG
Keeps all active closures in a linked list and provides a debugfs
interface to list them, which makes it possible to see asynchronous
operations that get stuck.
-
-# cgroup code needs to be updated:
-#
-#config CGROUP_BCACHE
-# bool "Cgroup controls for bcache"
-# depends on BCACHE && BLK_CGROUP
-# ---help---
-# TODO
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 5f587ce..ea5a59e 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -68,15 +68,11 @@
* alloc_bucket() cannot fail. This should be true but is not completely
* obvious.
*
- * Make sure all allocations get charged to the root cgroup
- *
* Plugging?
*
* If data write is less than hard sector size of ssd, round up offset in open
* bucket to the next whole sector
*
- * Also lookup by cgroup in get_open_bucket()
- *
* Superblock needs to be fleshed out for multiple cache devices
*
* Add a sysfs tunable for the number of writeback IOs in flight
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 3e88086..15fff4f 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -12,11 +12,9 @@
#include "request.h"
#include "writeback.h"
-#include <linux/cgroup.h>
#include <linux/module.h>
#include <linux/hash.h>
#include <linux/random.h>
-#include "blk-cgroup.h"
#include <trace/events/bcache.h>
@@ -27,171 +25,13 @@ struct kmem_cache *bch_search_cache;
static void bch_data_insert_start(struct closure *);
-/* Cgroup interface */
-
-#ifdef CONFIG_CGROUP_BCACHE
-static struct bch_cgroup bcache_default_cgroup = { .cache_mode = -1 };
-
-static struct bch_cgroup *cgroup_to_bcache(struct cgroup *cgroup)
-{
- struct cgroup_subsys_state *css;
- return cgroup &&
- (css = cgroup_subsys_state(cgroup, bcache_subsys_id))
- ? container_of(css, struct bch_cgroup, css)
- : &bcache_default_cgroup;
-}
-
-struct bch_cgroup *bch_bio_to_cgroup(struct bio *bio)
-{
- struct cgroup_subsys_state *css = bio->bi_css
- ? cgroup_subsys_state(bio->bi_css->cgroup, bcache_subsys_id)
- : task_subsys_state(current, bcache_subsys_id);
-
- return css
- ? container_of(css, struct bch_cgroup, css)
- : &bcache_default_cgroup;
-}
-
-static ssize_t cache_mode_read(struct cgroup *cgrp, struct cftype *cft,
- struct file *file,
- char __user *buf, size_t nbytes, loff_t *ppos)
-{
- char tmp[1024];
- int len = bch_snprint_string_list(tmp, PAGE_SIZE, bch_cache_modes,
- cgroup_to_bcache(cgrp)->cache_mode + 1);
-
- if (len < 0)
- return len;
-
- return simple_read_from_buffer(buf, nbytes, ppos, tmp, len);
-}
-
-static int cache_mode_write(struct cgroup *cgrp, struct cftype *cft,
- const char *buf)
-{
- int v = bch_read_string_list(buf, bch_cache_modes);
- if (v < 0)
- return v;
-
- cgroup_to_bcache(cgrp)->cache_mode = v - 1;
- return 0;
-}
-
-static u64 bch_verify_read(struct cgroup *cgrp, struct cftype *cft)
-{
- return cgroup_to_bcache(cgrp)->verify;
-}
-
-static int bch_verify_write(struct cgroup *cgrp, struct cftype *cft, u64 val)
-{
- cgroup_to_bcache(cgrp)->verify = val;
- return 0;
-}
-
-static u64 bch_cache_hits_read(struct cgroup *cgrp, struct cftype *cft)
-{
- struct bch_cgroup *bcachecg = cgroup_to_bcache(cgrp);
- return atomic_read(&bcachecg->stats.cache_hits);
-}
-
-static u64 bch_cache_misses_read(struct cgroup *cgrp, struct cftype *cft)
-{
- struct bch_cgroup *bcachecg = cgroup_to_bcache(cgrp);
- return atomic_read(&bcachecg->stats.cache_misses);
-}
-
-static u64 bch_cache_bypass_hits_read(struct cgroup *cgrp,
- struct cftype *cft)
-{
- struct bch_cgroup *bcachecg = cgroup_to_bcache(cgrp);
- return atomic_read(&bcachecg->stats.cache_bypass_hits);
-}
-
-static u64 bch_cache_bypass_misses_read(struct cgroup *cgrp,
- struct cftype *cft)
-{
- struct bch_cgroup *bcachecg = cgroup_to_bcache(cgrp);
- return atomic_read(&bcachecg->stats.cache_bypass_misses);
-}
-
-static struct cftype bch_files[] = {
- {
- .name = "cache_mode",
- .read = cache_mode_read,
- .write_string = cache_mode_write,
- },
- {
- .name = "verify",
- .read_u64 = bch_verify_read,
- .write_u64 = bch_verify_write,
- },
- {
- .name = "cache_hits",
- .read_u64 = bch_cache_hits_read,
- },
- {
- .name = "cache_misses",
- .read_u64 = bch_cache_misses_read,
- },
- {
- .name = "cache_bypass_hits",
- .read_u64 = bch_cache_bypass_hits_read,
- },
- {
- .name = "cache_bypass_misses",
- .read_u64 = bch_cache_bypass_misses_read,
- },
- { } /* terminate */
-};
-
-static void init_bch_cgroup(struct bch_cgroup *cg)
-{
- cg->cache_mode = -1;
-}
-
-static struct cgroup_subsys_state *bcachecg_create(struct cgroup *cgroup)
-{
- struct bch_cgroup *cg;
-
- cg = kzalloc(sizeof(*cg), GFP_KERNEL);
- if (!cg)
- return ERR_PTR(-ENOMEM);
- init_bch_cgroup(cg);
- return &cg->css;
-}
-
-static void bcachecg_destroy(struct cgroup *cgroup)
-{
- struct bch_cgroup *cg = cgroup_to_bcache(cgroup);
- kfree(cg);
-}
-
-struct cgroup_subsys bcache_subsys = {
- .create = bcachecg_create,
- .destroy = bcachecg_destroy,
- .subsys_id = bcache_subsys_id,
- .name = "bcache",
- .module = THIS_MODULE,
-};
-EXPORT_SYMBOL_GPL(bcache_subsys);
-#endif
-
static unsigned cache_mode(struct cached_dev *dc, struct bio *bio)
{
-#ifdef CONFIG_CGROUP_BCACHE
- int r = bch_bio_to_cgroup(bio)->cache_mode;
- if (r >= 0)
- return r;
-#endif
return BDEV_CACHE_MODE(&dc->sb);
}
static bool verify(struct cached_dev *dc, struct bio *bio)
{
-#ifdef CONFIG_CGROUP_BCACHE
- if (bch_bio_to_cgroup(bio)->verify)
- return true;
-#endif
return dc->verify;
}
@@ -1305,9 +1145,6 @@ void bch_flash_dev_request_init(struct bcache_device *d)
void bch_request_exit(void)
{
-#ifdef CONFIG_CGROUP_BCACHE
- cgroup_unload_subsys(&bcache_subsys);
-#endif
if (bch_search_cache)
kmem_cache_destroy(bch_search_cache);
}
@@ -1318,11 +1155,5 @@ int __init bch_request_init(void)
if (!bch_search_cache)
return -ENOMEM;
-#ifdef CONFIG_CGROUP_BCACHE
- cgroup_load_subsys(&bcache_subsys);
- init_bch_cgroup(&bcache_default_cgroup);
-
- cgroup_add_cftypes(&bcache_subsys, bch_files);
-#endif
return 0;
}
diff --git a/drivers/md/bcache/request.h b/drivers/md/bcache/request.h
index c117c40..1ff3687 100644
--- a/drivers/md/bcache/request.h
+++ b/drivers/md/bcache/request.h
@@ -1,8 +1,6 @@
#ifndef _BCACHE_REQUEST_H_
#define _BCACHE_REQUEST_H_
-#include <linux/cgroup.h>
-
struct data_insert_op {
struct closure cl;
struct cache_set *c;
@@ -42,20 +40,4 @@ void bch_flash_dev_request_init(struct bcache_device *d);
extern struct kmem_cache *bch_search_cache, *bch_passthrough_cache;
-struct bch_cgroup {
-#ifdef CONFIG_CGROUP_BCACHE
- struct cgroup_subsys_state css;
-#endif
- /*
- * We subtract one from the index into bch_cache_modes[], so that
- * default == -1; this makes it so the rest match up with d->cache_mode,
- * and we use d->cache_mode if cgrp->cache_mode < 0
- */
- short cache_mode;
- bool verify;
- struct cache_stat_collector stats;
-};
-
-struct bch_cgroup *bch_bio_to_cgroup(struct bio *bio);
-
#endif /* _BCACHE_REQUEST_H_ */
diff --git a/drivers/md/bcache/stats.c b/drivers/md/bcache/stats.c
index 84d0782..0ca072c 100644
--- a/drivers/md/bcache/stats.c
+++ b/drivers/md/bcache/stats.c
@@ -201,9 +201,6 @@ void bch_mark_cache_accounting(struct cache_set *c, struct bcache_device *d,
struct cached_dev *dc = container_of(d, struct cached_dev, disk);
mark_cache_stats(&dc->accounting.collector, hit, bypass);
mark_cache_stats(&c->accounting.collector, hit, bypass);
-#ifdef CONFIG_CGROUP_BCACHE
- mark_cache_stats(&(bch_bio_to_cgroup(s->orig_bio)->stats), hit, bypass);
-#endif
}
void bch_mark_cache_readahead(struct cache_set *c, struct bcache_device *d)