[PATCH 1/3] percpu_counter: add @gfp to percpu_counter_init()

From: Tejun Heo
Date: Mon Aug 25 2014 - 20:43:56 EST

Percpu allocator now supports allocation mask. Add @gfp to
percpu_counter_init() so that !GFP_KERNEL allocation masks can be used
with percpu_counters too.

We could have left percpu_counter_init() alone and added
percpu_counter_init_gfp(); however, the number of users isn't that
high and introducing _gfp variants to all percpu data structures would
be quite ugly, so let's just do the conversion. This is the one with
the most users. Other percpu data structures are a lot easier to
convert.

This patch doesn't make any functional difference.

Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/mmu.c | 2 +-
fs/btrfs/disk-io.c | 8 ++++----
fs/btrfs/extent-tree.c | 2 +-
fs/ext2/super.c | 6 +++---
fs/ext3/super.c | 6 +++---
fs/ext4/super.c | 14 +++++++++-----
fs/file_table.c | 2 +-
fs/quota/dquot.c | 2 +-
fs/super.c | 3 ++-
include/linux/percpu_counter.h | 10 ++++++----
include/net/dst_ops.h | 2 +-
include/net/inet_frag.h | 2 +-
lib/flex_proportions.c | 4 ++--
lib/percpu_counter.c | 4 ++--
lib/proportions.c | 6 +++---
mm/backing-dev.c | 2 +-
mm/mmap.c | 2 +-
mm/nommu.c | 2 +-
mm/shmem.c | 2 +-
net/dccp/proto.c | 2 +-
net/ipv4/tcp.c | 4 ++--
net/ipv4/tcp_memcontrol.c | 2 +-
net/sctp/protocol.c | 2 +-
23 files changed, 49 insertions(+), 42 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 9314678..5bd53f2 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4534,7 +4534,7 @@ int kvm_mmu_module_init(void)
if (!mmu_page_header_cache)
goto nomem;

- if (percpu_counter_init(&kvm_total_used_mmu_pages, 0))
+ if (percpu_counter_init(&kvm_total_used_mmu_pages, 0, GFP_KERNEL))
goto nomem;

register_shrinker(&mmu_shrinker);
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 08e65e9..61dae01 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1180,7 +1180,7 @@ static struct btrfs_subvolume_writers *btrfs_alloc_subvolume_writers(void)
if (!writers)
return ERR_PTR(-ENOMEM);

- ret = percpu_counter_init(&writers->counter, 0);
+ ret = percpu_counter_init(&writers->counter, 0, GFP_KERNEL);
if (ret < 0) {
kfree(writers);
return ERR_PTR(ret);
@@ -2185,7 +2185,7 @@ int open_ctree(struct super_block *sb,
goto fail_srcu;
}

- ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0);
+ ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_bdi;
@@ -2193,13 +2193,13 @@ int open_ctree(struct super_block *sb,
fs_info->dirty_metadata_batch = PAGE_CACHE_SIZE *
(1 + ilog2(nr_cpu_ids));

- ret = percpu_counter_init(&fs_info->delalloc_bytes, 0);
+ ret = percpu_counter_init(&fs_info->delalloc_bytes, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_dirty_metadata_bytes;
}

- ret = percpu_counter_init(&fs_info->bio_counter, 0);
+ ret = percpu_counter_init(&fs_info->bio_counter, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_delalloc_bytes;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 813537f..94ec71e 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3493,7 +3493,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
if (!found)
return -ENOMEM;

- ret = percpu_counter_init(&found->total_bytes_pinned, 0);
+ ret = percpu_counter_init(&found->total_bytes_pinned, 0, GFP_KERNEL);
if (ret) {
kfree(found);
return ret;
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index b88edc0..170dc41 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1067,14 +1067,14 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
ext2_rsv_window_add(sb, &sbi->s_rsv_window_head);

err = percpu_counter_init(&sbi->s_freeblocks_counter,
- ext2_count_free_blocks(sb));
+ ext2_count_free_blocks(sb), GFP_KERNEL);
if (!err) {
err = percpu_counter_init(&sbi->s_freeinodes_counter,
- ext2_count_free_inodes(sb));
+ ext2_count_free_inodes(sb), GFP_KERNEL);
}
if (!err) {
err = percpu_counter_init(&sbi->s_dirs_counter,
- ext2_count_dirs(sb));
+ ext2_count_dirs(sb), GFP_KERNEL);
}
if (err) {
ext2_msg(sb, KERN_ERR, "error: insufficient memory");
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 08cdfe5..eba021b 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2039,14 +2039,14 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
goto failed_mount2;
}
err = percpu_counter_init(&sbi->s_freeblocks_counter,
- ext3_count_free_blocks(sb));
+ ext3_count_free_blocks(sb), GFP_KERNEL);
if (!err) {
err = percpu_counter_init(&sbi->s_freeinodes_counter,
- ext3_count_free_inodes(sb));
+ ext3_count_free_inodes(sb), GFP_KERNEL);
}
if (!err) {
err = percpu_counter_init(&sbi->s_dirs_counter,
- ext3_count_dirs(sb));
+ ext3_count_dirs(sb), GFP_KERNEL);
}
if (err) {
ext3_msg(sb, KERN_ERR, "error: insufficient memory");
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 32b43ad..e25ca8f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3891,7 +3891,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
/* Register extent status tree shrinker */
ext4_es_register_shrinker(sbi);

- if ((err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0)) != 0) {
+ err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0, GFP_KERNEL);
+ if (err) {
ext4_msg(sb, KERN_ERR, "insufficient memory");
goto failed_mount3;
}
@@ -4105,17 +4106,20 @@ no_journal:
block = ext4_count_free_clusters(sb);
ext4_free_blocks_count_set(sbi->s_es,
EXT4_C2B(sbi, block));
- err = percpu_counter_init(&sbi->s_freeclusters_counter, block);
+ err = percpu_counter_init(&sbi->s_freeclusters_counter, block,
+ GFP_KERNEL);
if (!err) {
unsigned long freei = ext4_count_free_inodes(sb);
sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);
- err = percpu_counter_init(&sbi->s_freeinodes_counter, freei);
+ err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
+ GFP_KERNEL);
}
if (!err)
err = percpu_counter_init(&sbi->s_dirs_counter,
- ext4_count_dirs(sb));
+ ext4_count_dirs(sb), GFP_KERNEL);
if (!err)
- err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0);
+ err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,
+ GFP_KERNEL);
if (err) {
ext4_msg(sb, KERN_ERR, "insufficient memory");
goto failed_mount6;
diff --git a/fs/file_table.c b/fs/file_table.c
index 385bfd3..0bab12b 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -331,5 +331,5 @@ void __init files_init(unsigned long mempages)

n = (mempages * (PAGE_SIZE / 1024)) / 10;
files_stat.max_files = max_t(unsigned long, n, NR_FILE);
- percpu_counter_init(&nr_files, 0);
+ percpu_counter_init(&nr_files, 0, GFP_KERNEL);
}
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index f2d0eee..8b663b2 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2725,7 +2725,7 @@ static int __init dquot_init(void)
panic("Cannot create dquot hash table");

for (i = 0; i < _DQST_DQSTAT_LAST; i++) {
- ret = percpu_counter_init(&dqstats.counter[i], 0);
+ ret = percpu_counter_init(&dqstats.counter[i], 0, GFP_KERNEL);
if (ret)
panic("Cannot create dquot stat counters");
}
diff --git a/fs/super.c b/fs/super.c
index b9a214d..1b83610 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -175,7 +175,8 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
goto fail;

for (i = 0; i < SB_FREEZE_LEVELS; i++) {
- if (percpu_counter_init(&s->s_writers.counter[i], 0) < 0)
+ if (percpu_counter_init(&s->s_writers.counter[i], 0,
+ GFP_KERNEL) < 0)
goto fail;
lockdep_init_map(&s->s_writers.lock_map[i], sb_writers_name[i],
&type->s_writers_key[i], 0);
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index d5dd465..50e5009 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -12,6 +12,7 @@
#include <linux/threads.h>
#include <linux/percpu.h>
#include <linux/types.h>
+#include <linux/gfp.h>

#ifdef CONFIG_SMP

@@ -26,14 +27,14 @@ struct percpu_counter {

extern int percpu_counter_batch;

-int __percpu_counter_init(struct percpu_counter *fbc, s64 amount,
+int __percpu_counter_init(struct percpu_counter *fbc, s64 amount, gfp_t gfp,
struct lock_class_key *key);

-#define percpu_counter_init(fbc, value) \
+#define percpu_counter_init(fbc, value, gfp) \
({ \
static struct lock_class_key __key; \
\
- __percpu_counter_init(fbc, value, &__key); \
+ __percpu_counter_init(fbc, value, gfp, &__key); \
})

void percpu_counter_destroy(struct percpu_counter *fbc);
@@ -89,7 +90,8 @@ struct percpu_counter {
s64 count;
};

-static inline int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
+static inline int percpu_counter_init(struct percpu_counter *fbc, s64 amount,
+ gfp_t gfp)
{
fbc->count = amount;
return 0;
diff --git a/include/net/dst_ops.h b/include/net/dst_ops.h
index 2f26dfb..1f99a1d 100644
--- a/include/net/dst_ops.h
+++ b/include/net/dst_ops.h
@@ -63,7 +63,7 @@ static inline void dst_entries_add(struct dst_ops *dst, int val)

static inline int dst_entries_init(struct dst_ops *dst)
{
- return percpu_counter_init(&dst->pcpuc_entries, 0);
+ return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL);
}

static inline void dst_entries_destroy(struct dst_ops *dst)
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index 65a8855..8d17655 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -151,7 +151,7 @@ static inline void add_frag_mem_limit(struct inet_frag_queue *q, int i)

static inline void init_frag_mem_limit(struct netns_frags *nf)
{
- percpu_counter_init(&nf->mem, 0);
+ percpu_counter_init(&nf->mem, 0, GFP_KERNEL);
}

static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)
diff --git a/lib/flex_proportions.c b/lib/flex_proportions.c
index ebf3bac..b9d026b 100644
--- a/lib/flex_proportions.c
+++ b/lib/flex_proportions.c
@@ -40,7 +40,7 @@ int fprop_global_init(struct fprop_global *p)

p->period = 0;
/* Use 1 to avoid dealing with periods with 0 events... */
- err = percpu_counter_init(&p->events, 1);
+ err = percpu_counter_init(&p->events, 1, GFP_KERNEL);
if (err)
return err;
seqcount_init(&p->sequence);
@@ -172,7 +172,7 @@ int fprop_local_init_percpu(struct fprop_local_percpu *pl)
{
int err;

- err = percpu_counter_init(&pl->events, 0);
+ err = percpu_counter_init(&pl->events, 0, GFP_KERNEL);
if (err)
return err;
pl->period = 0;
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 7dd33577..1a28f0f 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -112,13 +112,13 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc)
}
EXPORT_SYMBOL(__percpu_counter_sum);

-int __percpu_counter_init(struct percpu_counter *fbc, s64 amount,
+int __percpu_counter_init(struct percpu_counter *fbc, s64 amount, gfp_t gfp,
struct lock_class_key *key)
{
raw_spin_lock_init(&fbc->lock);
lockdep_set_class(&fbc->lock, key);
fbc->count = amount;
- fbc->counters = alloc_percpu(s32);
+ fbc->counters = alloc_percpu_gfp(s32, gfp);
if (!fbc->counters)
return -ENOMEM;

diff --git a/lib/proportions.c b/lib/proportions.c
index 05df848..ca95f8d 100644
--- a/lib/proportions.c
+++ b/lib/proportions.c
@@ -83,11 +83,11 @@ int prop_descriptor_init(struct prop_descriptor *pd, int shift)
pd->index = 0;
pd->pg[0].shift = shift;
mutex_init(&pd->mutex);
- err = percpu_counter_init(&pd->pg[0].events, 0);
+ err = percpu_counter_init(&pd->pg[0].events, 0, GFP_KERNEL);
if (err)
goto out;

- err = percpu_counter_init(&pd->pg[1].events, 0);
+ err = percpu_counter_init(&pd->pg[1].events, 0, GFP_KERNEL);
if (err)
percpu_counter_destroy(&pd->pg[0].events);

@@ -193,7 +193,7 @@ int prop_local_init_percpu(struct prop_local_percpu *pl)
raw_spin_lock_init(&pl->lock);
pl->shift = 0;
pl->period = 0;
- return percpu_counter_init(&pl->events, 0);
+ return percpu_counter_init(&pl->events, 0, GFP_KERNEL);
}

void prop_local_destroy_percpu(struct prop_local_percpu *pl)
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 1706cbb..f19a818 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -455,7 +455,7 @@ int bdi_init(struct backing_dev_info *bdi)
bdi_wb_init(&bdi->wb, bdi);

for (i = 0; i < NR_BDI_STAT_ITEMS; i++) {
- err = percpu_counter_init(&bdi->bdi_stat[i], 0);
+ err = percpu_counter_init(&bdi->bdi_stat[i], 0, GFP_KERNEL);
if (err)
goto err;
}
diff --git a/mm/mmap.c b/mm/mmap.c
index c1f2ea4..d7ec93e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3196,7 +3196,7 @@ void __init mmap_init(void)
{
int ret;

- ret = percpu_counter_init(&vm_committed_as, 0);
+ ret = percpu_counter_init(&vm_committed_as, 0, GFP_KERNEL);
VM_BUG_ON(ret);
}

diff --git a/mm/nommu.c b/mm/nommu.c
index a881d96..bd1808e 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -539,7 +539,7 @@ void __init mmap_init(void)
{
int ret;

- ret = percpu_counter_init(&vm_committed_as, 0);
+ ret = percpu_counter_init(&vm_committed_as, 0, GFP_KERNEL);
VM_BUG_ON(ret);
vm_region_jar = KMEM_CACHE(vm_region, SLAB_PANIC);
}
diff --git a/mm/shmem.c b/mm/shmem.c
index 0e5fb22..d4bc55d 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2993,7 +2993,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
#endif

spin_lock_init(&sbinfo->stat_lock);
- if (percpu_counter_init(&sbinfo->used_blocks, 0))
+ if (percpu_counter_init(&sbinfo->used_blocks, 0, GFP_KERNEL))
goto failed;
sbinfo->free_inodes = sbinfo->max_inodes;

diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index de2c1e7..e421edd 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -1115,7 +1115,7 @@ static int __init dccp_init(void)

BUILD_BUG_ON(sizeof(struct dccp_skb_cb) >
FIELD_SIZEOF(struct sk_buff, cb));
- rc = percpu_counter_init(&dccp_orphan_count, 0);
+ rc = percpu_counter_init(&dccp_orphan_count, 0, GFP_KERNEL);
if (rc)
goto out_fail;
rc = -ENOBUFS;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 541f26a..d59c260 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3188,8 +3188,8 @@ void __init tcp_init(void)

BUILD_BUG_ON(sizeof(struct tcp_skb_cb) > sizeof(skb->cb));

- percpu_counter_init(&tcp_sockets_allocated, 0);
- percpu_counter_init(&tcp_orphan_count, 0);
+ percpu_counter_init(&tcp_sockets_allocated, 0, GFP_KERNEL);
+ percpu_counter_init(&tcp_orphan_count, 0, GFP_KERNEL);
tcp_hashinfo.bind_bucket_cachep =
kmem_cache_create("tcp_bind_bucket",
sizeof(struct inet_bind_bucket), 0,
diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c
index 3af5226..1d19135 100644
--- a/net/ipv4/tcp_memcontrol.c
+++ b/net/ipv4/tcp_memcontrol.c
@@ -32,7 +32,7 @@ int tcp_init_cgroup(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
res_parent = &parent_cg->memory_allocated;

res_counter_init(&cg_proto->memory_allocated, res_parent);
- percpu_counter_init(&cg_proto->sockets_allocated, 0);
+ percpu_counter_init(&cg_proto->sockets_allocated, 0, GFP_KERNEL);

return 0;
}
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 6240834..f00a85a 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1341,7 +1341,7 @@ static __init int sctp_init(void)
if (!sctp_chunk_cachep)
goto err_chunk_cachep;

- status = percpu_counter_init(&sctp_sockets_allocated, 0);
+ status = percpu_counter_init(&sctp_sockets_allocated, 0, GFP_KERNEL);
if (status)
goto err_percpu_counter_init;

--
1.9.3

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