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ocfs2: add extent block stealing for ocfs2 v5 

This patch add extent block (metadata) stealing mechanism for
extent allocation. This mechanism is same as the inode stealing.
if no room in slot specific extent_alloc, we will try to
allocate extent block from the next slot.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Acked-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Tiger Yang 2010-01-25 14:11:06 +08:00 committed by Joel Becker
parent a5f28ae4df
commit b89c54282d
9 changed files with 150 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/ocfs2/alloc.c
View File

@ -1050,7 +1050,8 @@ static int ocfs2_create_new_meta_bhs(handle_t *handle,
strcpy(eb->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE);
eb->h_blkno = cpu_to_le64(first_blkno);
eb->h_fs_generation = cpu_to_le32(osb->fs_generation);
eb->h_suballoc_slot = cpu_to_le16(osb->slot_num);
eb->h_suballoc_slot =
cpu_to_le16(meta_ac->ac_alloc_slot);
eb->h_suballoc_bit = cpu_to_le16(suballoc_bit_start);
eb->h_list.l_count =
cpu_to_le16(ocfs2_extent_recs_per_eb(osb->sb));
@ -6037,7 +6038,7 @@ static void ocfs2_truncate_log_worker(struct work_struct *work)
if (status < 0)
mlog_errno(status);
else
ocfs2_init_inode_steal_slot(osb);
ocfs2_init_steal_slots(osb);
mlog_exit(status);
}

2
fs/ocfs2/dir.c
View File

@ -2439,7 +2439,7 @@ static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb,
dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
memset(dx_root, 0, osb->sb->s_blocksize);
strcpy(dx_root->dr_signature, OCFS2_DX_ROOT_SIGNATURE);
dx_root->dr_suballoc_slot = cpu_to_le16(osb->slot_num);
dx_root->dr_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
dx_root->dr_suballoc_bit = cpu_to_le16(dr_suballoc_bit);
dx_root->dr_fs_generation = cpu_to_le32(osb->fs_generation);
dx_root->dr_blkno = cpu_to_le64(dr_blkno);

2
fs/ocfs2/localalloc.c
View File

@ -476,7 +476,7 @@ out_mutex:
out:
if (!status)
ocfs2_init_inode_steal_slot(osb);
ocfs2_init_steal_slots(osb);
mlog_exit(status);
return status;
}

29
fs/ocfs2/ocfs2.h
View File

@ -305,7 +305,9 @@ struct ocfs2_super
u32 s_next_generation;
unsigned long osb_flags;
s16 s_inode_steal_slot;
s16 s_meta_steal_slot;
atomic_t s_num_inodes_stolen;
atomic_t s_num_meta_stolen;
unsigned long s_mount_opt;
unsigned int s_atime_quantum;
@ -760,33 +762,6 @@ static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
}
static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
{
spin_lock(&osb->osb_lock);
osb->s_inode_steal_slot = OCFS2_INVALID_SLOT;
spin_unlock(&osb->osb_lock);
atomic_set(&osb->s_num_inodes_stolen, 0);
}
static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb,
s16 slot)
{
spin_lock(&osb->osb_lock);
osb->s_inode_steal_slot = slot;
spin_unlock(&osb->osb_lock);
}
static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb)
{
s16 slot;
spin_lock(&osb->osb_lock);
slot = osb->s_inode_steal_slot;
spin_unlock(&osb->osb_lock);
return slot;
}
#define ocfs2_set_bit ext2_set_bit
#define ocfs2_clear_bit ext2_clear_bit
#define ocfs2_test_bit ext2_test_bit

6
fs/ocfs2/refcounttree.c
View File

@ -626,7 +626,7 @@ static int ocfs2_create_refcount_tree(struct inode *inode,
rb = (struct ocfs2_refcount_block *)new_bh->b_data;
memset(rb, 0, inode->i_sb->s_blocksize);
strcpy((void *)rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE);
rb->rf_suballoc_slot = cpu_to_le16(osb->slot_num);
rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start);
rb->rf_fs_generation = cpu_to_le32(osb->fs_generation);
rb->rf_blkno = cpu_to_le64(first_blkno);
@ -1330,7 +1330,7 @@ static int ocfs2_expand_inline_ref_root(handle_t *handle,
memcpy(new_bh->b_data, ref_root_bh->b_data, sb->s_blocksize);
new_rb = (struct ocfs2_refcount_block *)new_bh->b_data;
new_rb->rf_suballoc_slot = cpu_to_le16(OCFS2_SB(sb)->slot_num);
new_rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start);
new_rb->rf_blkno = cpu_to_le64(blkno);
new_rb->rf_cpos = cpu_to_le32(0);
@ -1576,7 +1576,7 @@ static int ocfs2_new_leaf_refcount_block(handle_t *handle,
new_rb = (struct ocfs2_refcount_block *)new_bh->b_data;
memset(new_rb, 0, sb->s_blocksize);
strcpy((void *)new_rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE);
new_rb->rf_suballoc_slot = cpu_to_le16(OCFS2_SB(sb)->slot_num);
new_rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start);
new_rb->rf_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
new_rb->rf_blkno = cpu_to_le64(blkno);

171
fs/ocfs2/suballoc.c
View File

@ -51,7 +51,7 @@
#define ALLOC_NEW_GROUP 0x1
#define ALLOC_GROUPS_FROM_GLOBAL 0x2
#define OCFS2_MAX_INODES_TO_STEAL 1024
#define OCFS2_MAX_TO_STEAL 1024
static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg);
static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe);
@ -637,12 +637,113 @@ bail:
return status;
}
static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
{
spin_lock(&osb->osb_lock);
osb->s_inode_steal_slot = OCFS2_INVALID_SLOT;
spin_unlock(&osb->osb_lock);
atomic_set(&osb->s_num_inodes_stolen, 0);
}
static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb)
{
spin_lock(&osb->osb_lock);
osb->s_meta_steal_slot = OCFS2_INVALID_SLOT;
spin_unlock(&osb->osb_lock);
atomic_set(&osb->s_num_meta_stolen, 0);
}
void ocfs2_init_steal_slots(struct ocfs2_super *osb)
{
ocfs2_init_inode_steal_slot(osb);
ocfs2_init_meta_steal_slot(osb);
}
static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type)
{
spin_lock(&osb->osb_lock);
if (type == INODE_ALLOC_SYSTEM_INODE)
osb->s_inode_steal_slot = slot;
else if (type == EXTENT_ALLOC_SYSTEM_INODE)
osb->s_meta_steal_slot = slot;
spin_unlock(&osb->osb_lock);
}
static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type)
{
int slot = OCFS2_INVALID_SLOT;
spin_lock(&osb->osb_lock);
if (type == INODE_ALLOC_SYSTEM_INODE)
slot = osb->s_inode_steal_slot;
else if (type == EXTENT_ALLOC_SYSTEM_INODE)
slot = osb->s_meta_steal_slot;
spin_unlock(&osb->osb_lock);
return slot;
}
static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb)
{
return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE);
}
static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb)
{
return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE);
}
static int ocfs2_steal_resource(struct ocfs2_super *osb,
struct ocfs2_alloc_context *ac,
int type)
{
int i, status = -ENOSPC;
int slot = __ocfs2_get_steal_slot(osb, type);
/* Start to steal resource from the first slot after ours. */
if (slot == OCFS2_INVALID_SLOT)
slot = osb->slot_num + 1;
for (i = 0; i < osb->max_slots; i++, slot++) {
if (slot == osb->max_slots)
slot = 0;
if (slot == osb->slot_num)
continue;
status = ocfs2_reserve_suballoc_bits(osb, ac,
type,
(u32)slot, NULL,
NOT_ALLOC_NEW_GROUP);
if (status >= 0) {
__ocfs2_set_steal_slot(osb, slot, type);
break;
}
ocfs2_free_ac_resource(ac);
}
return status;
}
static int ocfs2_steal_inode(struct ocfs2_super *osb,
struct ocfs2_alloc_context *ac)
{
return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE);
}
static int ocfs2_steal_meta(struct ocfs2_super *osb,
struct ocfs2_alloc_context *ac)
{
return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE);
}
int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
int blocks,
struct ocfs2_alloc_context **ac)
{
int status;
u32 slot;
int slot = ocfs2_get_meta_steal_slot(osb);
*ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
if (!(*ac)) {
@ -653,12 +754,34 @@ int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
(*ac)->ac_bits_wanted = blocks;
(*ac)->ac_which = OCFS2_AC_USE_META;
slot = osb->slot_num;
(*ac)->ac_group_search = ocfs2_block_group_search;
if (slot != OCFS2_INVALID_SLOT &&
atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL)
goto extent_steal;
atomic_set(&osb->s_num_meta_stolen, 0);
status = ocfs2_reserve_suballoc_bits(osb, (*ac),
EXTENT_ALLOC_SYSTEM_INODE,
slot, NULL, ALLOC_NEW_GROUP);
(u32)osb->slot_num, NULL,
ALLOC_NEW_GROUP);
if (status >= 0) {
status = 0;
if (slot != OCFS2_INVALID_SLOT)
ocfs2_init_meta_steal_slot(osb);
goto bail;
} else if (status < 0 && status != -ENOSPC) {
mlog_errno(status);
goto bail;
}
ocfs2_free_ac_resource(*ac);
extent_steal:
status = ocfs2_steal_meta(osb, *ac);
atomic_inc(&osb->s_num_meta_stolen);
if (status < 0) {
if (status != -ENOSPC)
mlog_errno(status);
@ -685,43 +808,11 @@ int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
ac);
}
static int ocfs2_steal_inode_from_other_nodes(struct ocfs2_super *osb,
struct ocfs2_alloc_context *ac)
{
int i, status = -ENOSPC;
s16 slot = ocfs2_get_inode_steal_slot(osb);
/* Start to steal inodes from the first slot after ours. */
if (slot == OCFS2_INVALID_SLOT)
slot = osb->slot_num + 1;
for (i = 0; i < osb->max_slots; i++, slot++) {
if (slot == osb->max_slots)
slot = 0;
if (slot == osb->slot_num)
continue;
status = ocfs2_reserve_suballoc_bits(osb, ac,
INODE_ALLOC_SYSTEM_INODE,
slot, NULL,
NOT_ALLOC_NEW_GROUP);
if (status >= 0) {
ocfs2_set_inode_steal_slot(osb, slot);
break;
}
ocfs2_free_ac_resource(ac);
}
return status;
}
int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
struct ocfs2_alloc_context **ac)
{
int status;
s16 slot = ocfs2_get_inode_steal_slot(osb);
int slot = ocfs2_get_inode_steal_slot(osb);
u64 alloc_group;
*ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
@ -754,14 +845,14 @@ int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
* need to check our slots to see whether there is some space for us.
*/
if (slot != OCFS2_INVALID_SLOT &&
atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_INODES_TO_STEAL)
atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL)
goto inode_steal;
atomic_set(&osb->s_num_inodes_stolen, 0);
alloc_group = osb->osb_inode_alloc_group;
status = ocfs2_reserve_suballoc_bits(osb, *ac,
INODE_ALLOC_SYSTEM_INODE,
osb->slot_num,
(u32)osb->slot_num,
&alloc_group,
ALLOC_NEW_GROUP |
ALLOC_GROUPS_FROM_GLOBAL);
@ -789,7 +880,7 @@ int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
ocfs2_free_ac_resource(*ac);
inode_steal:
status = ocfs2_steal_inode_from_other_nodes(osb, *ac);
status = ocfs2_steal_inode(osb, *ac);
atomic_inc(&osb->s_num_inodes_stolen);
if (status < 0) {
if (status != -ENOSPC)

1
fs/ocfs2/suballoc.h
View File

@ -56,6 +56,7 @@ struct ocfs2_alloc_context {
is the same as ~0 - unlimited */
};
void ocfs2_init_steal_slots(struct ocfs2_super *osb);
void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac);
static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac)
{

10
fs/ocfs2/super.c
View File

@ -69,6 +69,7 @@
#include "xattr.h"
#include "quota.h"
#include "refcounttree.h"
#include "suballoc.h"
#include "buffer_head_io.h"
@ -301,9 +302,12 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
spin_lock(&osb->osb_lock);
out += snprintf(buf + out, len - out,
"%10s => Slot: %d NumStolen: %d\n", "Steal",
"%10s => InodeSlot: %d StolenInodes: %d, "
"MetaSlot: %d StolenMeta: %d\n", "Steal",
osb->s_inode_steal_slot,
atomic_read(&osb->s_num_inodes_stolen));
atomic_read(&osb->s_num_inodes_stolen),
osb->s_meta_steal_slot,
atomic_read(&osb->s_num_meta_stolen));
spin_unlock(&osb->osb_lock);
out += snprintf(buf + out, len - out, "OrphanScan => ");
@ -1997,7 +2001,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
osb->blocked_lock_count = 0;
spin_lock_init(&osb->osb_lock);
spin_lock_init(&osb->osb_xattr_lock);
ocfs2_init_inode_steal_slot(osb);
ocfs2_init_steal_slots(osb);
atomic_set(&osb->alloc_stats.moves, 0);
atomic_set(&osb->alloc_stats.local_data, 0);

2
fs/ocfs2/xattr.c
View File

@ -2282,7 +2282,7 @@ static int ocfs2_create_xattr_block(handle_t *handle,
xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
memset(xblk, 0, inode->i_sb->s_blocksize);
strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
xblk->xb_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
xblk->xb_blkno = cpu_to_le64(first_blkno);