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-rw-r--r--fs/btrfs/ctree.h1
-rw-r--r--fs/btrfs/disk-io.c7
-rw-r--r--fs/btrfs/extent-tree.c1
-rw-r--r--fs/btrfs/file.c1
-rw-r--r--fs/btrfs/inode.c10
-rw-r--r--fs/btrfs/transaction.c59
-rw-r--r--fs/btrfs/transaction.h1
7 files changed, 58 insertions, 22 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4eca0aa1ce74..5517dfc6f71c 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -580,6 +580,7 @@ struct btrfs_fs_info {
int do_barriers;
int closing;
atomic_t throttles;
+ atomic_t throttle_gen;
u64 total_pinned;
struct list_head dirty_cowonly_roots;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index eccdf13a95ac..27ffa9b7ddc8 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1171,8 +1171,10 @@ static int transaction_kthread(void *arg)
vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
- printk("btrfs: total reference cache size %Lu\n",
- root->fs_info->total_ref_cache_size);
+ if (root->fs_info->total_ref_cache_size > 20 * 1024 * 1024) {
+ printk("btrfs: total reference cache size %Lu\n",
+ root->fs_info->total_ref_cache_size);
+ }
mutex_lock(&root->fs_info->trans_mutex);
cur = root->fs_info->running_transaction;
@@ -1256,6 +1258,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
btrfs_mapping_init(&fs_info->mapping_tree);
atomic_set(&fs_info->nr_async_submits, 0);
atomic_set(&fs_info->throttles, 0);
+ atomic_set(&fs_info->throttle_gen, 0);
fs_info->sb = sb;
fs_info->max_extent = (u64)-1;
fs_info->max_inline = 8192 * 1024;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 0e294cfaa60c..6290cf41d647 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2650,6 +2650,7 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
}
}
while(1) {
+ atomic_inc(&root->fs_info->throttle_gen);
wret = walk_down_tree(trans, root, path, &level);
if (wret > 0)
break;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 3efec25e34b0..ded5281f8463 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -974,6 +974,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
balance_dirty_pages_ratelimited_nr(inode->i_mapping, num_pages);
if (num_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1)
btrfs_btree_balance_dirty(root, 1);
+ btrfs_throttle(root);
cond_resched();
}
out:
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4f977ea5497e..7c87f863d6f7 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2482,7 +2482,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
btrfs_update_inode_block_group(trans, dir);
out_unlock:
nr = trans->blocks_used;
- btrfs_end_transaction(trans, root);
+ btrfs_end_transaction_throttle(trans, root);
fail:
if (drop_inode) {
inode_dec_link_count(inode);
@@ -2535,7 +2535,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
drop_inode = 1;
nr = trans->blocks_used;
- btrfs_end_transaction(trans, root);
+ btrfs_end_transaction_throttle(trans, root);
fail:
if (drop_inode) {
inode_dec_link_count(inode);
@@ -2609,7 +2609,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
out_fail:
nr = trans->blocks_used;
- btrfs_end_transaction(trans, root);
+ btrfs_end_transaction_throttle(trans, root);
out_unlock:
if (drop_on_err)
@@ -3434,7 +3434,7 @@ static int btrfs_rename(struct inode * old_dir, struct dentry *old_dentry,
goto out_fail;
out_fail:
- btrfs_end_transaction(trans, root);
+ btrfs_end_transaction_throttle(trans, root);
out_unlock:
return ret;
}
@@ -3548,7 +3548,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
out_unlock:
nr = trans->blocks_used;
- btrfs_end_transaction(trans, root);
+ btrfs_end_transaction_throttle(trans, root);
out_fail:
if (drop_inode) {
inode_dec_link_count(inode);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index fcef3cae0c92..b8be6703189a 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -202,35 +202,64 @@ static noinline int wait_for_commit(struct btrfs_root *root,
return 0;
}
+void btrfs_throttle(struct btrfs_root *root)
+{
+ struct btrfs_fs_info *info = root->fs_info;
+
+harder:
+ if (atomic_read(&info->throttles)) {
+ DEFINE_WAIT(wait);
+ int thr;
+ int harder_count = 0;
+ thr = atomic_read(&info->throttle_gen);
+
+ do {
+ prepare_to_wait(&info->transaction_throttle,
+ &wait, TASK_UNINTERRUPTIBLE);
+ if (!atomic_read(&info->throttles)) {
+ finish_wait(&info->transaction_throttle, &wait);
+ break;
+ }
+ schedule();
+ finish_wait(&info->transaction_throttle, &wait);
+ } while (thr == atomic_read(&info->throttle_gen));
+
+ if (harder_count < 5 &&
+ info->total_ref_cache_size > 5 * 1024 * 1024) {
+ harder_count++;
+ goto harder;
+ }
+
+ if (harder_count < 10 &&
+ info->total_ref_cache_size > 10 * 1024 * 1024) {
+ harder_count++;
+ goto harder;
+ }
+ }
+}
+
static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, int throttle)
{
struct btrfs_transaction *cur_trans;
+ struct btrfs_fs_info *info = root->fs_info;
- mutex_lock(&root->fs_info->trans_mutex);
- cur_trans = root->fs_info->running_transaction;
+ mutex_lock(&info->trans_mutex);
+ cur_trans = info->running_transaction;
WARN_ON(cur_trans != trans->transaction);
WARN_ON(cur_trans->num_writers < 1);
cur_trans->num_writers--;
if (waitqueue_active(&cur_trans->writer_wait))
wake_up(&cur_trans->writer_wait);
-
- if (throttle && atomic_read(&root->fs_info->throttles)) {
- DEFINE_WAIT(wait);
- mutex_unlock(&root->fs_info->trans_mutex);
- prepare_to_wait(&root->fs_info->transaction_throttle, &wait,
- TASK_UNINTERRUPTIBLE);
- if (atomic_read(&root->fs_info->throttles))
- schedule();
- finish_wait(&root->fs_info->transaction_throttle, &wait);
- mutex_lock(&root->fs_info->trans_mutex);
- }
-
put_transaction(cur_trans);
- mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&info->trans_mutex);
memset(trans, 0, sizeof(*trans));
kmem_cache_free(btrfs_trans_handle_cachep, trans);
+
+ if (throttle)
+ btrfs_throttle(root);
+
return 0;
}
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 11fbdeceb26c..df2ca2aad1c0 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -91,4 +91,5 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
+void btrfs_throttle(struct btrfs_root *root);
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-19 02:33:10 +0000