b2 = (unsigned char *) bitmap;
for (i = 0; i < e4b->bd_sb->s_blocksize; i++) {
if (b1[i] != b2[i]) {
- printk("corruption in group %lu at byte %u(%u):"
- " %x in copy != %x on disk/prealloc\n",
- e4b->bd_group, i, i * 8, b1[i], b2[i]);
+ printk(KERN_ERR "corruption in group %lu "
+ "at byte %u(%u): %x in copy != %x "
+ "on disk/prealloc\n",
+ e4b->bd_group, i, i * 8, b1[i], b2[i]);
BUG();
}
}
void *buddy;
void *buddy2;
- if (!test_opt(sb, MBALLOC))
- return 0;
-
{
static int mb_check_counter;
if (mb_check_counter++ % 100 != 0)
if (bh[i] == NULL)
goto out;
- if (bh_uptodate_or_lock(bh[i]))
+ if (buffer_uptodate(bh[i]) &&
+ !(desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)))
continue;
+ lock_buffer(bh[i]);
spin_lock(sb_bgl_lock(EXT4_SB(sb), first_group + i));
if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
ext4_init_block_bitmap(sb, bh[i],
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
- remove_proc_entry("mb_groups", sbi->s_mb_proc);
- remove_proc_entry("mb_history", sbi->s_mb_proc);
-
+ if (sbi->s_proc != NULL) {
+ remove_proc_entry("mb_groups", sbi->s_proc);
+ remove_proc_entry("mb_history", sbi->s_proc);
+ }
kfree(sbi->s_mb_history);
}
struct ext4_sb_info *sbi = EXT4_SB(sb);
int i;
- if (sbi->s_mb_proc != NULL) {
- proc_create_data("mb_history", S_IRUGO, sbi->s_mb_proc,
+ if (sbi->s_proc != NULL) {
+ proc_create_data("mb_history", S_IRUGO, sbi->s_proc,
&ext4_mb_seq_history_fops, sb);
- proc_create_data("mb_groups", S_IRUGO, sbi->s_mb_proc,
+ proc_create_data("mb_groups", S_IRUGO, sbi->s_proc,
&ext4_mb_seq_groups_fops, sb);
}
unsigned max;
int ret;
- if (!test_opt(sb, MBALLOC))
- return 0;
-
i = (sb->s_blocksize_bits + 2) * sizeof(unsigned short);
sbi->s_mb_offsets = kmalloc(i, GFP_KERNEL);
if (sbi->s_mb_offsets == NULL) {
- clear_opt(sbi->s_mount_opt, MBALLOC);
return -ENOMEM;
}
sbi->s_mb_maxs = kmalloc(i, GFP_KERNEL);
if (sbi->s_mb_maxs == NULL) {
- clear_opt(sbi->s_mount_opt, MBALLOC);
kfree(sbi->s_mb_maxs);
return -ENOMEM;
}
/* init file for buddy data */
ret = ext4_mb_init_backend(sb);
if (ret != 0) {
- clear_opt(sbi->s_mount_opt, MBALLOC);
kfree(sbi->s_mb_offsets);
kfree(sbi->s_mb_maxs);
return ret;
sbi->s_mb_history_filter = EXT4_MB_HISTORY_DEFAULT;
sbi->s_mb_group_prealloc = MB_DEFAULT_GROUP_PREALLOC;
- i = sizeof(struct ext4_locality_group) * nr_cpu_ids;
- sbi->s_locality_groups = kmalloc(i, GFP_KERNEL);
+ sbi->s_locality_groups = alloc_percpu(struct ext4_locality_group);
if (sbi->s_locality_groups == NULL) {
- clear_opt(sbi->s_mount_opt, MBALLOC);
kfree(sbi->s_mb_offsets);
kfree(sbi->s_mb_maxs);
return -ENOMEM;
}
- for (i = 0; i < nr_cpu_ids; i++) {
+ for_each_possible_cpu(i) {
struct ext4_locality_group *lg;
- lg = &sbi->s_locality_groups[i];
+ lg = per_cpu_ptr(sbi->s_locality_groups, i);
mutex_init(&lg->lg_mutex);
for (j = 0; j < PREALLOC_TB_SIZE; j++)
INIT_LIST_HEAD(&lg->lg_prealloc_list[j]);
ext4_mb_init_per_dev_proc(sb);
ext4_mb_history_init(sb);
- printk("EXT4-fs: mballoc enabled\n");
+ printk(KERN_INFO "EXT4-fs: mballoc enabled\n");
return 0;
}
struct ext4_group_info *grinfo;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (!test_opt(sb, MBALLOC))
- return 0;
-
/* release freed, non-committed blocks */
spin_lock(&sbi->s_md_lock);
list_splice_init(&sbi->s_closed_transaction,
atomic_read(&sbi->s_mb_discarded));
}
- kfree(sbi->s_locality_groups);
-
+ free_percpu(sbi->s_locality_groups);
ext4_mb_history_release(sb);
ext4_mb_destroy_per_dev_proc(sb);
#define EXT4_MB_STREAM_REQ "stream_req"
#define EXT4_MB_GROUP_PREALLOC "group_prealloc"
-
-
-#define MB_PROC_FOPS(name) \
-static int ext4_mb_##name##_proc_show(struct seq_file *m, void *v) \
-{ \
- struct ext4_sb_info *sbi = m->private; \
- \
- seq_printf(m, "%ld\n", sbi->s_mb_##name); \
- return 0; \
-} \
- \
-static int ext4_mb_##name##_proc_open(struct inode *inode, struct file *file)\
-{ \
- return single_open(file, ext4_mb_##name##_proc_show, PDE(inode)->data);\
-} \
- \
-static ssize_t ext4_mb_##name##_proc_write(struct file *file, \
- const char __user *buf, size_t cnt, loff_t *ppos) \
-{ \
- struct ext4_sb_info *sbi = PDE(file->f_path.dentry->d_inode)->data;\
- char str[32]; \
- long value; \
- if (cnt >= sizeof(str)) \
- return -EINVAL; \
- if (copy_from_user(str, buf, cnt)) \
- return -EFAULT; \
- value = simple_strtol(str, NULL, 0); \
- if (value <= 0) \
- return -ERANGE; \
- sbi->s_mb_##name = value; \
- return cnt; \
-} \
- \
-static const struct file_operations ext4_mb_##name##_proc_fops = { \
- .owner = THIS_MODULE, \
- .open = ext4_mb_##name##_proc_open, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = single_release, \
- .write = ext4_mb_##name##_proc_write, \
-};
-
-MB_PROC_FOPS(stats);
-MB_PROC_FOPS(max_to_scan);
-MB_PROC_FOPS(min_to_scan);
-MB_PROC_FOPS(order2_reqs);
-MB_PROC_FOPS(stream_request);
-MB_PROC_FOPS(group_prealloc);
-
-#define MB_PROC_HANDLER(name, var) \
-do { \
- proc = proc_create_data(name, mode, sbi->s_mb_proc, \
- &ext4_mb_##var##_proc_fops, sbi); \
- if (proc == NULL) { \
- printk(KERN_ERR "EXT4-fs: can't to create %s\n", name); \
- goto err_out; \
- } \
-} while (0)
-
static int ext4_mb_init_per_dev_proc(struct super_block *sb)
{
mode_t mode = S_IFREG | S_IRUGO | S_IWUSR;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct proc_dir_entry *proc;
- char devname[64];
- if (proc_root_ext4 == NULL) {
- sbi->s_mb_proc = NULL;
+ if (sbi->s_proc == NULL)
return -EINVAL;
- }
- bdevname(sb->s_bdev, devname);
- sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4);
-
- MB_PROC_HANDLER(EXT4_MB_STATS_NAME, stats);
- MB_PROC_HANDLER(EXT4_MB_MAX_TO_SCAN_NAME, max_to_scan);
- MB_PROC_HANDLER(EXT4_MB_MIN_TO_SCAN_NAME, min_to_scan);
- MB_PROC_HANDLER(EXT4_MB_ORDER2_REQ, order2_reqs);
- MB_PROC_HANDLER(EXT4_MB_STREAM_REQ, stream_request);
- MB_PROC_HANDLER(EXT4_MB_GROUP_PREALLOC, group_prealloc);
+ EXT4_PROC_HANDLER(EXT4_MB_STATS_NAME, mb_stats);
+ EXT4_PROC_HANDLER(EXT4_MB_MAX_TO_SCAN_NAME, mb_max_to_scan);
+ EXT4_PROC_HANDLER(EXT4_MB_MIN_TO_SCAN_NAME, mb_min_to_scan);
+ EXT4_PROC_HANDLER(EXT4_MB_ORDER2_REQ, mb_order2_reqs);
+ EXT4_PROC_HANDLER(EXT4_MB_STREAM_REQ, mb_stream_request);
+ EXT4_PROC_HANDLER(EXT4_MB_GROUP_PREALLOC, mb_group_prealloc);
return 0;
err_out:
- printk(KERN_ERR "EXT4-fs: Unable to create %s\n", devname);
- remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_mb_proc);
- remove_proc_entry(devname, proc_root_ext4);
- sbi->s_mb_proc = NULL;
-
+ remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_proc);
return -ENOMEM;
}
static int ext4_mb_destroy_per_dev_proc(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
- char devname[64];
- if (sbi->s_mb_proc == NULL)
+ if (sbi->s_proc == NULL)
return -EINVAL;
- bdevname(sb->s_bdev, devname);
- remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_mb_proc);
- remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_mb_proc);
- remove_proc_entry(devname, proc_root_ext4);
+ remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_proc);
+ remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_proc);
return 0;
}
kmem_cache_destroy(ext4_pspace_cachep);
return -ENOMEM;
}
-#ifdef CONFIG_PROC_FS
- proc_root_ext4 = proc_mkdir("fs/ext4", NULL);
- if (proc_root_ext4 == NULL)
- printk(KERN_ERR "EXT4-fs: Unable to create fs/ext4\n");
-#endif
return 0;
}
/* XXX: synchronize_rcu(); */
kmem_cache_destroy(ext4_pspace_cachep);
kmem_cache_destroy(ext4_ac_cachep);
-#ifdef CONFIG_PROC_FS
- remove_proc_entry("fs/ext4", NULL);
-#endif
}
*/
static noinline_for_stack int
ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
- handle_t *handle)
+ handle_t *handle, unsigned long reserv_blks)
{
struct buffer_head *bitmap_bh = NULL;
struct ext4_super_block *es;
le16_add_cpu(&gdp->bg_free_blocks_count, -ac->ac_b_ex.fe_len);
gdp->bg_checksum = ext4_group_desc_csum(sbi, ac->ac_b_ex.fe_group, gdp);
spin_unlock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group));
-
+ percpu_counter_sub(&sbi->s_freeblocks_counter, ac->ac_b_ex.fe_len);
/*
- * free blocks account has already be reduced/reserved
- * at write_begin() time for delayed allocation
- * do not double accounting
+ * Now reduce the dirty block count also. Should not go negative
*/
if (!(ac->ac_flags & EXT4_MB_DELALLOC_RESERVED))
- percpu_counter_sub(&sbi->s_freeblocks_counter,
- ac->ac_b_ex.fe_len);
+ /* release all the reserved blocks if non delalloc */
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter, reserv_blks);
+ else
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter,
+ ac->ac_b_ex.fe_len);
if (sbi->s_log_groups_per_flex) {
ext4_group_t flex_group = ext4_flex_group(sbi,
mb_debug("use %u/%u from group pa %p\n", pa->pa_lstart-len, len, pa);
}
+/*
+ * Return the prealloc space that have minimal distance
+ * from the goal block. @cpa is the prealloc
+ * space that is having currently known minimal distance
+ * from the goal block.
+ */
+static struct ext4_prealloc_space *
+ext4_mb_check_group_pa(ext4_fsblk_t goal_block,
+ struct ext4_prealloc_space *pa,
+ struct ext4_prealloc_space *cpa)
+{
+ ext4_fsblk_t cur_distance, new_distance;
+
+ if (cpa == NULL) {
+ atomic_inc(&pa->pa_count);
+ return pa;
+ }
+ cur_distance = abs(goal_block - cpa->pa_pstart);
+ new_distance = abs(goal_block - pa->pa_pstart);
+
+ if (cur_distance < new_distance)
+ return cpa;
+
+ /* drop the previous reference */
+ atomic_dec(&cpa->pa_count);
+ atomic_inc(&pa->pa_count);
+ return pa;
+}
+
/*
* search goal blocks in preallocated space
*/
int order, i;
struct ext4_inode_info *ei = EXT4_I(ac->ac_inode);
struct ext4_locality_group *lg;
- struct ext4_prealloc_space *pa;
+ struct ext4_prealloc_space *pa, *cpa = NULL;
+ ext4_fsblk_t goal_block;
/* only data can be preallocated */
if (!(ac->ac_flags & EXT4_MB_HINT_DATA))
/* The max size of hash table is PREALLOC_TB_SIZE */
order = PREALLOC_TB_SIZE - 1;
+ goal_block = ac->ac_g_ex.fe_group * EXT4_BLOCKS_PER_GROUP(ac->ac_sb) +
+ ac->ac_g_ex.fe_start +
+ le32_to_cpu(EXT4_SB(ac->ac_sb)->s_es->s_first_data_block);
+ /*
+ * search for the prealloc space that is having
+ * minimal distance from the goal block.
+ */
for (i = order; i < PREALLOC_TB_SIZE; i++) {
rcu_read_lock();
list_for_each_entry_rcu(pa, &lg->lg_prealloc_list[i],
spin_lock(&pa->pa_lock);
if (pa->pa_deleted == 0 &&
pa->pa_free >= ac->ac_o_ex.fe_len) {
- atomic_inc(&pa->pa_count);
- ext4_mb_use_group_pa(ac, pa);
- spin_unlock(&pa->pa_lock);
- ac->ac_criteria = 20;
- rcu_read_unlock();
- return 1;
+
+ cpa = ext4_mb_check_group_pa(goal_block,
+ pa, cpa);
}
spin_unlock(&pa->pa_lock);
}
rcu_read_unlock();
}
+ if (cpa) {
+ ext4_mb_use_group_pa(ac, cpa);
+ ac->ac_criteria = 20;
+ return 1;
+ }
return 0;
}
*
* FIXME!! Make sure it is valid at all the call sites
*/
-void ext4_mb_discard_inode_preallocations(struct inode *inode)
+void ext4_discard_preallocations(struct inode *inode)
{
struct ext4_inode_info *ei = EXT4_I(inode);
struct super_block *sb = inode->i_sb;
struct ext4_buddy e4b;
int err;
- if (!test_opt(sb, MBALLOC) || !S_ISREG(inode->i_mode)) {
+ if (!S_ISREG(inode->i_mode)) {
/*BUG_ON(!list_empty(&ei->i_prealloc_list));*/
return;
}
* per cpu locality group is to reduce the contention between block
* request from multiple CPUs.
*/
- ac->ac_lg = &sbi->s_locality_groups[get_cpu()];
- put_cpu();
+ ac->ac_lg = per_cpu_ptr(sbi->s_locality_groups, raw_smp_processor_id());
/* we're going to use group allocation */
ac->ac_flags |= EXT4_MB_HINT_GROUP_ALLOC;
ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
struct ext4_allocation_request *ar, int *errp)
{
+ int freed;
struct ext4_allocation_context *ac = NULL;
struct ext4_sb_info *sbi;
struct super_block *sb;
ext4_fsblk_t block = 0;
- int freed;
- int inquota;
+ unsigned long inquota;
+ unsigned long reserv_blks = 0;
sb = ar->inode->i_sb;
sbi = EXT4_SB(sb);
- if (!test_opt(sb, MBALLOC)) {
- block = ext4_old_new_blocks(handle, ar->inode, ar->goal,
- &(ar->len), errp);
- return block;
- }
if (!EXT4_I(ar->inode)->i_delalloc_reserved_flag) {
/*
* With delalloc we already reserved the blocks
*/
- ar->len = ext4_has_free_blocks(sbi, ar->len);
- }
-
- if (ar->len == 0) {
- *errp = -ENOSPC;
- return 0;
+ while (ar->len && ext4_claim_free_blocks(sbi, ar->len)) {
+ /* let others to free the space */
+ yield();
+ ar->len = ar->len >> 1;
+ }
+ if (!ar->len) {
+ *errp = -ENOSPC;
+ return 0;
+ }
+ reserv_blks = ar->len;
}
-
while (ar->len && DQUOT_ALLOC_BLOCK(ar->inode, ar->len)) {
ar->flags |= EXT4_MB_HINT_NOPREALLOC;
ar->len--;
}
if (likely(ac->ac_status == AC_STATUS_FOUND)) {
- *errp = ext4_mb_mark_diskspace_used(ac, handle);
+ *errp = ext4_mb_mark_diskspace_used(ac, handle, reserv_blks);
if (*errp == -EAGAIN) {
ac->ac_b_ex.fe_group = 0;
ac->ac_b_ex.fe_start = 0;
projects / linux-2.6-omap-h63xx.git / blobdiff