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Btrfs: extent_map optimizations to cut down on CPU usage

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-10-15 16:18:55 -04:00
parent 3326d1b07c
commit 810191ff30
6 changed files with 40 additions and 91 deletions
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fs/btrfs/disk-io.c
+10 -10
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@@ -644,20 +644,20 @@ int close_ctree(struct btrfs_root *root)
int btrfs_buffer_uptodate(struct extent_buffer *buf)
{
struct inode *btree_inode = buf->last_page->mapping->host;
struct inode *btree_inode = buf->first_page->mapping->host;
return extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, buf);
}
int btrfs_set_buffer_uptodate(struct extent_buffer *buf)
{
struct inode *btree_inode = buf->last_page->mapping->host;
struct inode *btree_inode = buf->first_page->mapping->host;
return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree,
buf);
}
void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
u64 transid = btrfs_header_generation(buf);
struct inode *btree_inode = root->fs_info->btree_inode;
@@ -678,7 +678,7 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
void btrfs_set_buffer_defrag(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
set_extent_bits(&BTRFS_I(btree_inode)->extent_tree, buf->start,
buf->start + buf->len - 1, EXTENT_DEFRAG, GFP_NOFS);
@@ -686,7 +686,7 @@ void btrfs_set_buffer_defrag(struct extent_buffer *buf)
void btrfs_set_buffer_defrag_done(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
set_extent_bits(&BTRFS_I(btree_inode)->extent_tree, buf->start,
buf->start + buf->len - 1, EXTENT_DEFRAG_DONE,
@@ -695,7 +695,7 @@ void btrfs_set_buffer_defrag_done(struct extent_buffer *buf)
int btrfs_buffer_defrag(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
return test_range_bit(&BTRFS_I(btree_inode)->extent_tree,
buf->start, buf->start + buf->len - 1, EXTENT_DEFRAG, 0);
@@ -703,7 +703,7 @@ int btrfs_buffer_defrag(struct extent_buffer *buf)
int btrfs_buffer_defrag_done(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
return test_range_bit(&BTRFS_I(btree_inode)->extent_tree,
buf->start, buf->start + buf->len - 1,
@@ -712,7 +712,7 @@ int btrfs_buffer_defrag_done(struct extent_buffer *buf)
int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
return clear_extent_bits(&BTRFS_I(btree_inode)->extent_tree,
buf->start, buf->start + buf->len - 1,
@@ -721,7 +721,7 @@ int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf)
int btrfs_clear_buffer_defrag(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
return clear_extent_bits(&BTRFS_I(btree_inode)->extent_tree,
buf->start, buf->start + buf->len - 1,
@@ -730,7 +730,7 @@ int btrfs_clear_buffer_defrag(struct extent_buffer *buf)
int btrfs_read_buffer(struct extent_buffer *buf)
{
struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root;
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
struct inode *btree_inode = root->fs_info->btree_inode;
return read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree,
buf, 1);