AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

Btrfs: 64 bit div fixes

Browse Source 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-06-12 07:43:08 -04:00 committed by David Woodhouse
parent 39279cc3d2
commit 84f54cfa78
4 changed files with 31 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
fs/btrfs/extent-tree.c
View File

@ -65,7 +65,6 @@ static int cache_block_group(struct btrfs_root *root,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
printk("cache block group %Lu\n", block_group->key.objectid);
key.objectid = block_group->key.objectid;
key.flags = 0;
key.offset = 0;
@ -164,8 +163,8 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
static u64 leaf_range(struct btrfs_root *root)
{
u64 size = BTRFS_LEAF_DATA_SIZE(root);
size = size / (sizeof(struct btrfs_extent_item) +
sizeof(struct btrfs_item));
do_div(size, sizeof(struct btrfs_extent_item) +
sizeof(struct btrfs_item));
return size;
}
@ -219,6 +218,13 @@ static u64 find_search_start(struct btrfs_root *root,
goto again;
}
static u64 div_factor(u64 num, int factor)
{
num *= factor;
do_div(num, 10);
return num;
}
struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
struct btrfs_block_group_cache
*hint, u64 search_start,
@ -255,17 +261,18 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
if (shint->data == data) {
used = btrfs_block_group_used(&shint->item);
if (used + shint->pinned <
(shint->key.offset * factor) / 10) {
div_factor(shint->key.offset, factor)) {
return shint;
}
}
}
if (hint && hint->data == data) {
used = btrfs_block_group_used(&hint->item);
if (used + hint->pinned < (hint->key.offset * factor) / 10) {
if (used + hint->pinned <
div_factor(hint->key.offset, factor)) {
return hint;
}
if (used >= (hint->key.offset * 8) / 10) {
if (used >= div_factor(hint->key.offset, 8)) {
radix_tree_tag_clear(radix,
hint->key.objectid +
hint->key.offset - 1,
@ -297,11 +304,11 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
cache[i]->key.offset;
used = btrfs_block_group_used(&cache[i]->item);
if (used + cache[i]->pinned <
(cache[i]->key.offset * factor) / 10) {
div_factor(cache[i]->key.offset, factor)) {
found_group = cache[i];
goto found;
}
if (used >= (cache[i]->key.offset * 8) / 10) {
if (used >= div_factor(cache[i]->key.offset, 8)) {
radix_tree_tag_clear(radix,
cache[i]->key.objectid +
cache[i]->key.offset - 1,
@ -348,7 +355,6 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
goto again;
}
if (!found_group) {
printk("find block group bailing to zero data %d\n", data);
ret = radix_tree_gang_lookup(radix,
(void **)&found_group, 0, 1);
if (ret == 0) {
@ -386,7 +392,6 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 1);
if (ret != 0) {
printk("can't find block %Lu %Lu\n", blocknr, num_blocks);
BUG();
}
BUG_ON(ret != 0);
@ -601,8 +606,7 @@ static int update_block_group(struct btrfs_trans_handle *trans,
}
}
if (cache->data != data &&
old_val < cache->key.offset / 2) {
printk("changing block group %Lu from %d to %d\n", cache->key.objectid, cache->data, data);
old_val < (cache->key.offset >> 1)) {
cache->data = data;
radix_tree_delete(cache->radix,
cache->key.objectid +
@ -634,9 +638,8 @@ printk("changing block group %Lu from %d to %d\n", cache->key.objectid, cache->d
blocknr + i);
}
}
if (old_val < cache->key.offset / 2 &&
old_val + num >= cache->key.offset / 2) {
printk("group %Lu now available\n", cache->key.objectid);
if (old_val < (cache->key.offset >> 1) &&
old_val + num >= (cache->key.offset >> 1)) {
radix_tree_tag_set(cache->radix,
cache->key.objectid +
cache->key.offset - 1,
@ -1000,10 +1003,10 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
}
if (start_found)
limit = last_block +
block_group->key.offset / 2;
(block_group->key.offset >> 1);
else
limit = search_start +
block_group->key.offset / 2;
(block_group->key.offset >> 1);
ret = btrfs_next_leaf(root, path);
if (ret == 0)
continue;
@ -1534,9 +1537,11 @@ int btrfs_read_block_groups(struct btrfs_root *root)
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_leaf *leaf;
u64 group_size_blocks = BTRFS_BLOCK_GROUP_SIZE / root->blocksize;
u64 group_size_blocks;
u64 used;
group_size_blocks = BTRFS_BLOCK_GROUP_SIZE >>
root->fs_info->sb->s_blocksize_bits;
root = info->extent_root;
key.objectid = 0;
key.offset = group_size_blocks;
@ -1590,7 +1595,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
(void *)cache);
BUG_ON(ret);
used = btrfs_block_group_used(bi);
if (used < (key.offset * 8) / 10) {
if (used < div_factor(key.offset, 8)) {
radix_tree_tag_set(radix, found_key.objectid +
found_key.offset - 1,
BTRFS_BLOCK_GROUP_AVAIL);

3
fs/btrfs/file-item.c
View File

@ -239,7 +239,8 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
if (isize <= key.offset)
return 0;
new_item_span = isize - key.offset;
blocks = (new_item_span + root->blocksize - 1) / root->blocksize;
blocks = (new_item_span + root->blocksize - 1) >>
root->fs_info->sb->s_blocksize_bits;
new_item_size = blocks * BTRFS_CRC32_SIZE;
if (new_item_size >= btrfs_item_size(leaf->items + slot))
return 0;

7
fs/btrfs/file.c
View File

@ -82,7 +82,7 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
for (i = 0; i < num_pages; i++) {
offset = pos & (PAGE_CACHE_SIZE -1);
this_write = min(PAGE_CACHE_SIZE - offset, write_bytes);
this_write = min((size_t)PAGE_CACHE_SIZE - offset, write_bytes);
/* FIXME, one block at a time */
mutex_lock(&root->fs_info->fs_mutex);
@ -395,7 +395,7 @@ static int prepare_pages(struct btrfs_root *root,
cancel_dirty_page(pages[i], PAGE_CACHE_SIZE);
wait_on_page_writeback(pages[i]);
offset = pos & (PAGE_CACHE_SIZE -1);
this_write = min(PAGE_CACHE_SIZE - offset, write_bytes);
this_write = min((size_t)PAGE_CACHE_SIZE - offset, write_bytes);
if (!page_has_buffers(pages[i])) {
create_empty_buffers(pages[i],
root->fs_info->sb->s_blocksize,
@ -567,7 +567,8 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
while(count > 0) {
size_t offset = pos & (PAGE_CACHE_SIZE - 1);
size_t write_bytes = min(count, PAGE_CACHE_SIZE - offset);
size_t write_bytes = min(count,
(size_t)PAGE_CACHE_SIZE - offset);
size_t num_pages = (write_bytes + PAGE_CACHE_SIZE - 1) >>
PAGE_CACHE_SHIFT;

2
fs/btrfs/root-tree.c
View File

@ -102,7 +102,7 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
ret = btrfs_del_item(trans, root, path);
} else {
btrfs_set_root_refs(ri, refs - 1);
printk("ref now %u root %Lu %Lu %u\n", refs -1, key->objectid, key->offset, key->flags);
printk("ref now %u root %llu %Lu %u\n", refs -1, key->objectid, key->offset, key->flags);
mark_buffer_dirty(path->nodes[0]);
}
out: