Btrfs: add the ability to cache a pointer into the eb
This cuts down on the CPU time used by map_private_extent_buffer Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
0b32f4bbb4
commit
cfed81a04e
|
@ -2333,6 +2333,7 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
|
|||
{
|
||||
struct extent_buffer *left = path->nodes[0];
|
||||
struct extent_buffer *upper = path->nodes[1];
|
||||
struct btrfs_map_token token;
|
||||
struct btrfs_disk_key disk_key;
|
||||
int slot;
|
||||
u32 i;
|
||||
|
@ -2344,6 +2345,8 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
|
|||
u32 data_end;
|
||||
u32 this_item_size;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
if (empty)
|
||||
nr = 0;
|
||||
else
|
||||
|
@ -2421,8 +2424,8 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
|
|||
push_space = BTRFS_LEAF_DATA_SIZE(root);
|
||||
for (i = 0; i < right_nritems; i++) {
|
||||
item = btrfs_item_nr(right, i);
|
||||
push_space -= btrfs_item_size(right, item);
|
||||
btrfs_set_item_offset(right, item, push_space);
|
||||
push_space -= btrfs_token_item_size(right, item, &token);
|
||||
btrfs_set_token_item_offset(right, item, push_space, &token);
|
||||
}
|
||||
|
||||
left_nritems -= push_items;
|
||||
|
@ -2553,6 +2556,9 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
|
|||
int wret;
|
||||
u32 this_item_size;
|
||||
u32 old_left_item_size;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
if (empty)
|
||||
nr = min(right_nritems, max_slot);
|
||||
|
@ -2613,9 +2619,10 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
|
|||
|
||||
item = btrfs_item_nr(left, i);
|
||||
|
||||
ioff = btrfs_item_offset(left, item);
|
||||
btrfs_set_item_offset(left, item,
|
||||
ioff - (BTRFS_LEAF_DATA_SIZE(root) - old_left_item_size));
|
||||
ioff = btrfs_token_item_offset(left, item, &token);
|
||||
btrfs_set_token_item_offset(left, item,
|
||||
ioff - (BTRFS_LEAF_DATA_SIZE(root) - old_left_item_size),
|
||||
&token);
|
||||
}
|
||||
btrfs_set_header_nritems(left, old_left_nritems + push_items);
|
||||
|
||||
|
@ -2645,8 +2652,9 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
|
|||
for (i = 0; i < right_nritems; i++) {
|
||||
item = btrfs_item_nr(right, i);
|
||||
|
||||
push_space = push_space - btrfs_item_size(right, item);
|
||||
btrfs_set_item_offset(right, item, push_space);
|
||||
push_space = push_space - btrfs_token_item_size(right,
|
||||
item, &token);
|
||||
btrfs_set_token_item_offset(right, item, push_space, &token);
|
||||
}
|
||||
|
||||
btrfs_mark_buffer_dirty(left);
|
||||
|
@ -2767,6 +2775,9 @@ static noinline int copy_for_split(struct btrfs_trans_handle *trans,
|
|||
int ret = 0;
|
||||
int wret;
|
||||
struct btrfs_disk_key disk_key;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
nritems = nritems - mid;
|
||||
btrfs_set_header_nritems(right, nritems);
|
||||
|
@ -2788,8 +2799,9 @@ static noinline int copy_for_split(struct btrfs_trans_handle *trans,
|
|||
struct btrfs_item *item = btrfs_item_nr(right, i);
|
||||
u32 ioff;
|
||||
|
||||
ioff = btrfs_item_offset(right, item);
|
||||
btrfs_set_item_offset(right, item, ioff + rt_data_off);
|
||||
ioff = btrfs_token_item_offset(right, item, &token);
|
||||
btrfs_set_token_item_offset(right, item,
|
||||
ioff + rt_data_off, &token);
|
||||
}
|
||||
|
||||
btrfs_set_header_nritems(l, mid);
|
||||
|
@ -3284,6 +3296,9 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
|
|||
unsigned int old_size;
|
||||
unsigned int size_diff;
|
||||
int i;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
leaf = path->nodes[0];
|
||||
slot = path->slots[0];
|
||||
|
@ -3310,8 +3325,9 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
|
|||
u32 ioff;
|
||||
item = btrfs_item_nr(leaf, i);
|
||||
|
||||
ioff = btrfs_item_offset(leaf, item);
|
||||
btrfs_set_item_offset(leaf, item, ioff + size_diff);
|
||||
ioff = btrfs_token_item_offset(leaf, item, &token);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
ioff + size_diff, &token);
|
||||
}
|
||||
|
||||
/* shift the data */
|
||||
|
@ -3381,6 +3397,9 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
|
|||
unsigned int old_data;
|
||||
unsigned int old_size;
|
||||
int i;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
leaf = path->nodes[0];
|
||||
|
||||
|
@ -3410,8 +3429,9 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
|
|||
u32 ioff;
|
||||
item = btrfs_item_nr(leaf, i);
|
||||
|
||||
ioff = btrfs_item_offset(leaf, item);
|
||||
btrfs_set_item_offset(leaf, item, ioff - data_size);
|
||||
ioff = btrfs_token_item_offset(leaf, item, &token);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
ioff - data_size, &token);
|
||||
}
|
||||
|
||||
/* shift the data */
|
||||
|
@ -3454,6 +3474,9 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
|
|||
unsigned int data_end;
|
||||
struct btrfs_disk_key disk_key;
|
||||
struct btrfs_key found_key;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
for (i = 0; i < nr; i++) {
|
||||
if (total_size + data_size[i] + sizeof(struct btrfs_item) >
|
||||
|
@ -3519,8 +3542,9 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
|
|||
u32 ioff;
|
||||
|
||||
item = btrfs_item_nr(leaf, i);
|
||||
ioff = btrfs_item_offset(leaf, item);
|
||||
btrfs_set_item_offset(leaf, item, ioff - total_data);
|
||||
ioff = btrfs_token_item_offset(leaf, item, &token);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
ioff - total_data, &token);
|
||||
}
|
||||
/* shift the items */
|
||||
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr),
|
||||
|
@ -3547,9 +3571,10 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
|
|||
btrfs_cpu_key_to_disk(&disk_key, cpu_key + i);
|
||||
btrfs_set_item_key(leaf, &disk_key, slot + i);
|
||||
item = btrfs_item_nr(leaf, slot + i);
|
||||
btrfs_set_item_offset(leaf, item, data_end - data_size[i]);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
data_end - data_size[i], &token);
|
||||
data_end -= data_size[i];
|
||||
btrfs_set_item_size(leaf, item, data_size[i]);
|
||||
btrfs_set_token_item_size(leaf, item, data_size[i], &token);
|
||||
}
|
||||
btrfs_set_header_nritems(leaf, nritems + nr);
|
||||
btrfs_mark_buffer_dirty(leaf);
|
||||
|
@ -3588,6 +3613,9 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans,
|
|||
int ret;
|
||||
struct extent_buffer *leaf;
|
||||
int slot;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
leaf = path->nodes[0];
|
||||
slot = path->slots[0];
|
||||
|
@ -3619,8 +3647,9 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans,
|
|||
u32 ioff;
|
||||
|
||||
item = btrfs_item_nr(leaf, i);
|
||||
ioff = btrfs_item_offset(leaf, item);
|
||||
btrfs_set_item_offset(leaf, item, ioff - total_data);
|
||||
ioff = btrfs_token_item_offset(leaf, item, &token);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
ioff - total_data, &token);
|
||||
}
|
||||
/* shift the items */
|
||||
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr),
|
||||
|
@ -3639,9 +3668,10 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans,
|
|||
btrfs_cpu_key_to_disk(&disk_key, cpu_key + i);
|
||||
btrfs_set_item_key(leaf, &disk_key, slot + i);
|
||||
item = btrfs_item_nr(leaf, slot + i);
|
||||
btrfs_set_item_offset(leaf, item, data_end - data_size[i]);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
data_end - data_size[i], &token);
|
||||
data_end -= data_size[i];
|
||||
btrfs_set_item_size(leaf, item, data_size[i]);
|
||||
btrfs_set_token_item_size(leaf, item, data_size[i], &token);
|
||||
}
|
||||
|
||||
btrfs_set_header_nritems(leaf, nritems + nr);
|
||||
|
@ -3814,6 +3844,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|||
int wret;
|
||||
int i;
|
||||
u32 nritems;
|
||||
struct btrfs_map_token token;
|
||||
|
||||
btrfs_init_map_token(&token);
|
||||
|
||||
leaf = path->nodes[0];
|
||||
last_off = btrfs_item_offset_nr(leaf, slot + nr - 1);
|
||||
|
@ -3835,8 +3868,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|||
u32 ioff;
|
||||
|
||||
item = btrfs_item_nr(leaf, i);
|
||||
ioff = btrfs_item_offset(leaf, item);
|
||||
btrfs_set_item_offset(leaf, item, ioff + dsize);
|
||||
ioff = btrfs_token_item_offset(leaf, item, &token);
|
||||
btrfs_set_token_item_offset(leaf, item,
|
||||
ioff + dsize, &token);
|
||||
}
|
||||
|
||||
memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot),
|
||||
|
|
|
@ -1546,6 +1546,17 @@ struct btrfs_ioctl_defrag_range_args {
|
|||
|
||||
#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
|
||||
|
||||
struct btrfs_map_token {
|
||||
struct extent_buffer *eb;
|
||||
char *kaddr;
|
||||
unsigned long offset;
|
||||
};
|
||||
|
||||
static inline void btrfs_init_map_token (struct btrfs_map_token *token)
|
||||
{
|
||||
memset(token, 0, sizeof(*token));
|
||||
}
|
||||
|
||||
/* some macros to generate set/get funcs for the struct fields. This
|
||||
* assumes there is a lefoo_to_cpu for every type, so lets make a simple
|
||||
* one for u8:
|
||||
|
@ -1569,6 +1580,8 @@ struct btrfs_ioctl_defrag_range_args {
|
|||
#ifndef BTRFS_SETGET_FUNCS
|
||||
#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
|
||||
u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
|
||||
u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \
|
||||
void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
|
||||
void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
|
||||
#endif
|
||||
|
||||
|
|
|
@ -44,8 +44,9 @@
|
|||
#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
|
||||
u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
|
||||
void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); \
|
||||
u##bits btrfs_##name(struct extent_buffer *eb, \
|
||||
type *s) \
|
||||
void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token); \
|
||||
u##bits btrfs_token_##name(struct extent_buffer *eb, \
|
||||
type *s, struct btrfs_map_token *token) \
|
||||
{ \
|
||||
unsigned long part_offset = (unsigned long)s; \
|
||||
unsigned long offset = part_offset + offsetof(type, member); \
|
||||
|
@ -54,9 +55,18 @@ u##bits btrfs_##name(struct extent_buffer *eb, \
|
|||
char *kaddr; \
|
||||
unsigned long map_start; \
|
||||
unsigned long map_len; \
|
||||
unsigned long mem_len = sizeof(((type *)0)->member); \
|
||||
u##bits res; \
|
||||
if (token && token->kaddr && token->offset <= offset && \
|
||||
token->eb == eb && \
|
||||
(token->offset + PAGE_CACHE_SIZE >= offset + mem_len)) { \
|
||||
kaddr = token->kaddr; \
|
||||
p = (type *)(kaddr + part_offset - token->offset); \
|
||||
res = le##bits##_to_cpu(p->member); \
|
||||
return res; \
|
||||
} \
|
||||
err = map_private_extent_buffer(eb, offset, \
|
||||
sizeof(((type *)0)->member), \
|
||||
mem_len, \
|
||||
&kaddr, &map_start, &map_len); \
|
||||
if (err) { \
|
||||
__le##bits leres; \
|
||||
|
@ -65,10 +75,15 @@ u##bits btrfs_##name(struct extent_buffer *eb, \
|
|||
} \
|
||||
p = (type *)(kaddr + part_offset - map_start); \
|
||||
res = le##bits##_to_cpu(p->member); \
|
||||
if (token) { \
|
||||
token->kaddr = kaddr; \
|
||||
token->offset = map_start; \
|
||||
token->eb = eb; \
|
||||
} \
|
||||
return res; \
|
||||
} \
|
||||
void btrfs_set_##name(struct extent_buffer *eb, \
|
||||
type *s, u##bits val) \
|
||||
void btrfs_set_token_##name(struct extent_buffer *eb, \
|
||||
type *s, u##bits val, struct btrfs_map_token *token) \
|
||||
{ \
|
||||
unsigned long part_offset = (unsigned long)s; \
|
||||
unsigned long offset = part_offset + offsetof(type, member); \
|
||||
|
@ -77,8 +92,17 @@ void btrfs_set_##name(struct extent_buffer *eb, \
|
|||
char *kaddr; \
|
||||
unsigned long map_start; \
|
||||
unsigned long map_len; \
|
||||
unsigned long mem_len = sizeof(((type *)0)->member); \
|
||||
if (token && token->kaddr && token->offset <= offset && \
|
||||
token->eb == eb && \
|
||||
(token->offset + PAGE_CACHE_SIZE >= offset + mem_len)) { \
|
||||
kaddr = token->kaddr; \
|
||||
p = (type *)(kaddr + part_offset - token->offset); \
|
||||
p->member = cpu_to_le##bits(val); \
|
||||
return; \
|
||||
} \
|
||||
err = map_private_extent_buffer(eb, offset, \
|
||||
sizeof(((type *)0)->member), \
|
||||
mem_len, \
|
||||
&kaddr, &map_start, &map_len); \
|
||||
if (err) { \
|
||||
__le##bits val2; \
|
||||
|
@ -88,7 +112,22 @@ void btrfs_set_##name(struct extent_buffer *eb, \
|
|||
} \
|
||||
p = (type *)(kaddr + part_offset - map_start); \
|
||||
p->member = cpu_to_le##bits(val); \
|
||||
}
|
||||
if (token) { \
|
||||
token->kaddr = kaddr; \
|
||||
token->offset = map_start; \
|
||||
token->eb = eb; \
|
||||
} \
|
||||
} \
|
||||
void btrfs_set_##name(struct extent_buffer *eb, \
|
||||
type *s, u##bits val) \
|
||||
{ \
|
||||
btrfs_set_token_##name(eb, s, val, NULL); \
|
||||
} \
|
||||
u##bits btrfs_##name(struct extent_buffer *eb, \
|
||||
type *s) \
|
||||
{ \
|
||||
return btrfs_token_##name(eb, s, NULL); \
|
||||
} \
|
||||
|
||||
#include "ctree.h"
|
||||
|
||||
|
|
Loading…
Reference in a new issue