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Btrfs: Use balance_dirty_pages_nr on btree blocks

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btrfs_btree_balance_dirty is changed to pass the number of pages dirtied
for more accurate dirty throttling.  This lets the VM make better decisions
about when to force some writeback.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-09-17 10:58:06 -04:00
parent 7d7d6068be
commit d3c2fdcf7b
6 changed files with 51 additions and 20 deletions
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14
fs/btrfs/transaction.c
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@@ -18,6 +18,7 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/writeback.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
@@ -340,6 +341,7 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly)
struct btrfs_fs_info *info = root->fs_info;
int ret;
struct btrfs_trans_handle *trans;
unsigned long nr;
if (root->defrag_running)
return 0;
@@ -348,10 +350,11 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly)
while (1) {
root->defrag_running = 1;
ret = btrfs_defrag_leaves(trans, root, cacheonly);
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
mutex_unlock(&info->fs_mutex);
btrfs_btree_balance_dirty(root);
btrfs_btree_balance_dirty(info->tree_root, nr);
cond_resched();
mutex_lock(&info->fs_mutex);
@@ -398,6 +401,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
{
struct dirty_root *dirty;
struct btrfs_trans_handle *trans;
unsigned long nr;
u64 num_blocks;
u64 blocks_used;
int ret = 0;
@@ -426,11 +430,11 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
&dirty->root->root_item);
if (err)
ret = err;
nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, tree_root);
BUG_ON(ret);
mutex_unlock(&tree_root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(tree_root);
btrfs_btree_balance_dirty(tree_root, nr);
schedule();
mutex_lock(&tree_root->fs_info->fs_mutex);
@@ -449,13 +453,15 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
BUG();
break;
}
nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, tree_root);
BUG_ON(ret);
kfree(dirty->root);
kfree(dirty);
mutex_unlock(&tree_root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(tree_root);
btrfs_btree_balance_dirty(tree_root, nr);
schedule();
}
return ret;