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infa: add quick dent list for speedup

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This commit is contained in:
Thomas Schoebel-Theuer 2019-03-12 14:36:25 +01:00
parent 930d33e338
commit b1861be0a9
5 changed files with 48 additions and 22 deletions
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1
kernel/mars_server.c
View File

@ -372,6 +372,7 @@ int handler_thread(void *data)
{
struct mars_global handler_global = {
.dent_anchor = LIST_HEAD_INIT(handler_global.dent_anchor),
.dent_quick_anchor = LIST_HEAD_INIT(handler_global.dent_quick_anchor),
.brick_anchor = LIST_HEAD_INIT(handler_global.brick_anchor),
.global_power = {
.button = true,

7
kernel/sy_old/mars_main.c
View File

@ -2409,6 +2409,7 @@ int peer_thread(void *data)
list_replace_init(&peer->remote_dent_list, &old_list);
list_replace_init(&tmp_global.dent_anchor, &peer->remote_dent_list);
list_del_init(&tmp_global.dent_quick_anchor);
mutex_unlock(&peer->peer_lock);
@ -2416,7 +2417,7 @@ int peer_thread(void *data)
mars_trigger();
mars_free_dent_all(NULL, &old_list);
mars_free_dent_all(&tmp_global, &old_list);
}
brick_string_free(cmd.cmd_str1);
@ -2446,7 +2447,7 @@ int peer_thread(void *data)
free_and_restart:
brick_string_free(cmd.cmd_str1);
mars_free_dent_all(NULL, &tmp_global.dent_anchor);
mars_free_dent_all(&tmp_global, &tmp_global.dent_anchor);
/* additional threads should give up immediately */
if (peer->do_additional && !peer->do_communicate)
break;
@ -2751,7 +2752,7 @@ int kill_any(void *buf, struct mars_dent *dent)
}
MARS_DBG("killing dent = '%s'\n", dent->d_path);
mars_kill_dent(dent);
mars_kill_dent(global, dent);
return 1;
}

5
kernel/sy_old/strategy.h
View File

@ -125,10 +125,9 @@ typedef int (*mars_dent_checker_fn)(struct mars_dent *parent, const char *name,
typedef int (*mars_dent_worker_fn)(struct mars_global *global, struct mars_dent *dent, bool prepare, bool direction);
extern int mars_dent_work(struct mars_global *global, char *dirname, int allocsize, mars_dent_checker_fn checker, mars_dent_worker_fn worker, void *buf, int maxdepth);
extern struct mars_dent *_mars_find_dent(struct mars_global *global, const char *path);
extern struct mars_dent *mars_find_dent(struct mars_global *global, const char *path);
extern void mars_kill_dent(struct mars_dent *dent);
extern void mars_free_dent(struct mars_dent *dent);
extern void mars_kill_dent(struct mars_global *global, struct mars_dent *dent);
extern void mars_free_dent(struct mars_global *global, struct mars_dent *dent);
extern void mars_free_dent_all(struct mars_global *global, struct list_head *anchor);
// low-level brick instantiation

55
kernel/sy_old/sy_generic.c
View File

@ -1575,7 +1575,7 @@ restart:
MARS_DBG("killing dent '%s'\n", dent->d_path);
list_del_init(tmp);
mars_free_dent(dent);
mars_free_dent(NULL, dent);
}
up_write(&global->dent_mutex);
@ -1636,17 +1636,20 @@ done:
}
EXPORT_SYMBOL_GPL(mars_dent_work);
struct mars_dent *_mars_find_dent(struct mars_global *global, const char *path)
static inline
struct mars_dent *_mars_find_dent(struct list_head *anchor, const char *path, bool use_dent_link)
{
struct mars_dent *res = NULL;
struct list_head *tmp;
if (!rwsem_is_locked(&global->dent_mutex)) {
MARS_ERR("dent_mutex not held!\n");
}
for (tmp = anchor->next; tmp != anchor; tmp = tmp->next) {
struct mars_dent *tmp_dent;
if (use_dent_link)
tmp_dent = container_of(tmp, struct mars_dent, dent_link);
else
tmp_dent = container_of(tmp, struct mars_dent, dent_quick_link);
for (tmp = global->dent_anchor.next; tmp != &global->dent_anchor; tmp = tmp->next) {
struct mars_dent *tmp_dent = container_of(tmp, struct mars_dent, dent_link);
if (!strcmp(tmp_dent->d_path, path)) {
res = tmp_dent;
break;
@ -1655,34 +1658,54 @@ struct mars_dent *_mars_find_dent(struct mars_global *global, const char *path)
return res;
}
EXPORT_SYMBOL_GPL(_mars_find_dent);
struct mars_dent *mars_find_dent(struct mars_global *global, const char *path)
{
struct mars_dent *res;
if (!global)
return NULL;
down_read(&global->dent_mutex);
res = _mars_find_dent(global, path);
res = _mars_find_dent(&global->dent_quick_anchor, path, false);
up_read(&global->dent_mutex);
if (res)
return res;
down_write(&global->dent_mutex);
res = _mars_find_dent(&global->dent_quick_anchor, path, false);
if (!res) {
res = _mars_find_dent(&global->dent_anchor, path, true);
if (res) {
list_del_init(&res->dent_quick_link);
list_add(&res->dent_quick_link, &global->dent_quick_anchor);
}
}
up_write(&global->dent_mutex);
return res;
}
EXPORT_SYMBOL_GPL(mars_find_dent);
void mars_kill_dent(struct mars_dent *dent)
void mars_kill_dent(struct mars_global *global, struct mars_dent *dent)
{
if (global)
down_write(&global->dent_mutex);
list_del_init(&dent->dent_link);
list_del_init(&dent->dent_quick_link);
if (global)
up_write(&global->dent_mutex);
dent->d_killme = true;
mars_kill_brick_all(NULL, &dent->brick_list, true);
mars_kill_brick_all(global, &dent->brick_list, true);
}
EXPORT_SYMBOL_GPL(mars_kill_dent);
void mars_free_dent(struct mars_dent *dent)
void mars_free_dent(struct mars_global *global, struct mars_dent *dent)
{
int i;
MARS_IO("%p path='%s'\n", dent, dent->d_path);
mars_kill_dent(dent);
mars_kill_dent(global, dent);
CHECK_HEAD_EMPTY(&dent->dent_link);
CHECK_HEAD_EMPTY(&dent->dent_quick_link);
@ -1717,8 +1740,10 @@ void mars_free_dent_all(struct mars_global *global, struct list_head *anchor)
/* Needs to be done in reverse order because later d_parent pointers may
* reference earlier list members.
*/
if (global)
if (global) {
down_write(&global->dent_mutex);
list_del_init(&global->dent_quick_anchor);
}
list_replace_init(anchor, &tmp_list);
if (global)
up_write(&global->dent_mutex);
@ -1730,7 +1755,7 @@ void mars_free_dent_all(struct mars_global *global, struct list_head *anchor)
list_del_init(&dent->dent_link);
list_del_init(&dent->dent_quick_link);
MARS_IO("freeing dent %p\n", dent);
mars_free_dent(dent);
mars_free_dent(global, dent);
}
}
EXPORT_SYMBOL_GPL(mars_free_dent_all);

2
kernel/sy_old/sy_net.c
View File

@ -100,7 +100,7 @@ int mars_recv_dent_list(struct mars_socket *sock, struct list_head *anchor)
status = mars_recv_struct(sock, dent, mars_dent_meta);
if (status <= 0) {
mars_free_dent(dent);
mars_free_dent(NULL, dent);
goto done;
}
list_add_tail(&dent->dent_link, anchor);