forked from Minki/linux
Btrfs: use a separate flag for search_start vs a hint in find_free_extent
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
David Woodhouse
parent
1e2677e000
commit
fbdc762b4e
@ -5,8 +5,9 @@
|
||||
#include "transaction.h"
|
||||
|
||||
static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
||||
*orig_root, u64 num_blocks, u64 search_start, u64
|
||||
search_end, struct btrfs_key *ins, int data);
|
||||
*orig_root, u64 num_blocks, u64 search_start,
|
||||
u64 search_end, u64 hint_block,
|
||||
struct btrfs_key *ins, int data);
|
||||
static int finish_current_insert(struct btrfs_trans_handle *trans, struct
|
||||
btrfs_root *extent_root);
|
||||
static int del_pending_extents(struct btrfs_trans_handle *trans, struct
|
||||
@ -157,12 +158,6 @@ static struct btrfs_block_group_cache *lookup_block_group(struct
|
||||
block_group->key.objectid + block_group->key.offset)
|
||||
return block_group;
|
||||
}
|
||||
WARN_ON(1);
|
||||
printk("lookup_block_group fails for blocknr %Lu\n", blocknr);
|
||||
printk("last ret was %d\n", ret);
|
||||
if (ret) {
|
||||
printk("last block group was %Lu %Lu\n", block_group->key.objectid, block_group->key.offset);
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
@ -378,7 +373,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_key ins;
|
||||
u32 refs;
|
||||
|
||||
find_free_extent(trans, root->fs_info->extent_root, 0, 0, (u64)-1,
|
||||
find_free_extent(trans, root->fs_info->extent_root, 0, 0, (u64)-1, 0,
|
||||
&ins, 0);
|
||||
path = btrfs_alloc_path();
|
||||
BUG_ON(!path);
|
||||
@ -495,7 +490,7 @@ static int write_one_cache_group(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_block_group_item *bi;
|
||||
struct btrfs_key ins;
|
||||
|
||||
find_free_extent(trans, extent_root, 0, 0, (u64)-1, &ins, 0);
|
||||
find_free_extent(trans, extent_root, 0, 0, (u64)-1, 0, &ins, 0);
|
||||
ret = btrfs_search_slot(trans, extent_root, &cache->key, path, 0, 1);
|
||||
BUG_ON(ret);
|
||||
bi = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
|
||||
@ -788,7 +783,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
||||
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
|
||||
key.offset = num_blocks;
|
||||
|
||||
find_free_extent(trans, root, 0, 0, (u64)-1, &ins, 0);
|
||||
find_free_extent(trans, root, 0, 0, (u64)-1, 0, &ins, 0);
|
||||
path = btrfs_alloc_path();
|
||||
BUG_ON(!path);
|
||||
btrfs_init_path(path);
|
||||
@ -906,7 +901,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
||||
*/
|
||||
static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
||||
*orig_root, u64 num_blocks, u64 search_start, u64
|
||||
search_end, struct btrfs_key *ins, int data)
|
||||
search_end, u64 hint_block,
|
||||
struct btrfs_key *ins, int data)
|
||||
{
|
||||
struct btrfs_path *path;
|
||||
struct btrfs_key key;
|
||||
@ -926,6 +922,7 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
||||
int level;
|
||||
struct btrfs_block_group_cache *block_group;
|
||||
int full_scan = 0;
|
||||
int wrapped = 0;
|
||||
u64 limit;
|
||||
|
||||
path = btrfs_alloc_path();
|
||||
@ -940,10 +937,10 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
|
||||
}
|
||||
if (search_end == (u64)-1)
|
||||
search_end = btrfs_super_total_blocks(info->disk_super);
|
||||
if (search_start) {
|
||||
block_group = lookup_block_group(info, search_start);
|
||||
if (hint_block) {
|
||||
block_group = lookup_block_group(info, hint_block);
|
||||
block_group = btrfs_find_block_group(root, block_group,
|
||||
search_start, data, 1);
|
||||
hint_block, data, 1);
|
||||
} else {
|
||||
block_group = btrfs_find_block_group(root,
|
||||
trans->block_group, 0,
|
||||
@ -954,7 +951,7 @@ check_failed:
|
||||
if (!block_group->data)
|
||||
search_start = find_search_start(root, &block_group,
|
||||
search_start, total_needed);
|
||||
else
|
||||
else if (!full_scan)
|
||||
search_start = max(block_group->last_alloc, search_start);
|
||||
|
||||
btrfs_init_path(path);
|
||||
@ -1039,7 +1036,7 @@ check_failed:
|
||||
|
||||
start_found = 1;
|
||||
last_block = key.objectid + key.offset;
|
||||
if (last_block >= block_group->key.objectid +
|
||||
if (!full_scan && last_block >= block_group->key.objectid +
|
||||
block_group->key.offset) {
|
||||
btrfs_release_path(root, path);
|
||||
search_start = block_group->key.objectid +
|
||||
@ -1059,10 +1056,15 @@ check_pending:
|
||||
BUG_ON(ins->objectid < search_start);
|
||||
|
||||
if (ins->objectid + num_blocks >= search_end) {
|
||||
if (full_scan)
|
||||
return -ENOSPC;
|
||||
if (full_scan) {
|
||||
ret = -ENOSPC;
|
||||
goto error;
|
||||
}
|
||||
search_start = orig_search_start;
|
||||
full_scan = 1;
|
||||
if (wrapped)
|
||||
full_scan = 1;
|
||||
else
|
||||
wrapped = 1;
|
||||
goto new_group;
|
||||
}
|
||||
for (test_block = ins->objectid;
|
||||
@ -1132,14 +1134,20 @@ check_pending:
|
||||
new_group:
|
||||
if (search_start + num_blocks >= search_end) {
|
||||
search_start = orig_search_start;
|
||||
printk("doing full scan!\n");
|
||||
full_scan = 1;
|
||||
if (full_scan) {
|
||||
ret = -ENOSPC;
|
||||
goto error;
|
||||
}
|
||||
if (wrapped)
|
||||
full_scan = 1;
|
||||
else
|
||||
wrapped = 1;
|
||||
}
|
||||
block_group = lookup_block_group(info, search_start);
|
||||
cond_resched();
|
||||
if (!full_scan)
|
||||
block_group = btrfs_find_block_group(root, block_group,
|
||||
search_start, data, 0);
|
||||
cond_resched();
|
||||
goto check_failed;
|
||||
|
||||
error:
|
||||
@ -1156,12 +1164,13 @@ error:
|
||||
*/
|
||||
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root, u64 owner,
|
||||
u64 num_blocks, u64 search_start,
|
||||
u64 num_blocks, u64 hint_block,
|
||||
u64 search_end, struct btrfs_key *ins, int data)
|
||||
{
|
||||
int ret;
|
||||
int pending_ret;
|
||||
u64 super_blocks_used;
|
||||
u64 search_start = 0;
|
||||
struct btrfs_fs_info *info = root->fs_info;
|
||||
struct btrfs_root *extent_root = info->extent_root;
|
||||
struct btrfs_extent_item extent_item;
|
||||
@ -1193,7 +1202,7 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
|
||||
*/
|
||||
if (data) {
|
||||
ret = find_free_extent(trans, root, 0, 0,
|
||||
search_end, &prealloc_key, 0);
|
||||
search_end, 0, &prealloc_key, 0);
|
||||
if (ret) {
|
||||
return ret;
|
||||
}
|
||||
@ -1204,9 +1213,11 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
|
||||
search_start = info->extent_tree_prealloc[0] + 1;
|
||||
}
|
||||
}
|
||||
if (hint_block < search_start)
|
||||
hint_block = search_start;
|
||||
/* do the real allocation */
|
||||
ret = find_free_extent(trans, root, num_blocks, search_start,
|
||||
search_end, ins, data);
|
||||
search_end, hint_block, ins, data);
|
||||
if (ret) {
|
||||
return ret;
|
||||
}
|
||||
@ -1226,8 +1237,12 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
|
||||
else
|
||||
search_start = ins->objectid + ins->offset;
|
||||
|
||||
if (hint_block < search_start)
|
||||
hint_block = search_start;
|
||||
|
||||
ret = find_free_extent(trans, root, 0, search_start,
|
||||
search_end, &prealloc_key, 0);
|
||||
search_end, hint_block,
|
||||
&prealloc_key, 0);
|
||||
if (ret) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user