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dlm: change rsbtbl rwlock to spinlock

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The rwlock is almost always used in write mode, so there's no reason
to not use a spinlock instead.

Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
David Teigland 2009-01-07 16:50:41 -06:00
parent 892c4467e3
commit c7be761a81
5 changed files with 32 additions and 32 deletions
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10
fs/dlm/recover.c
View file

@ -726,7 +726,7 @@ int dlm_create_root_list(struct dlm_ls *ls)
}
for (i = 0; i < ls->ls_rsbtbl_size; i++) {
read_lock(&ls->ls_rsbtbl[i].lock);
spin_lock(&ls->ls_rsbtbl[i].lock);
list_for_each_entry(r, &ls->ls_rsbtbl[i].list, res_hashchain) {
list_add(&r->res_root_list, &ls->ls_root_list);
dlm_hold_rsb(r);
@ -737,7 +737,7 @@ int dlm_create_root_list(struct dlm_ls *ls)
but no other recovery steps should do anything with them. */
if (dlm_no_directory(ls)) {
read_unlock(&ls->ls_rsbtbl[i].lock);
spin_unlock(&ls->ls_rsbtbl[i].lock);
continue;
}
@ -745,7 +745,7 @@ int dlm_create_root_list(struct dlm_ls *ls)
list_add(&r->res_root_list, &ls->ls_root_list);
dlm_hold_rsb(r);
}
read_unlock(&ls->ls_rsbtbl[i].lock);
spin_unlock(&ls->ls_rsbtbl[i].lock);
}
out:
up_write(&ls->ls_root_sem);
@ -775,7 +775,7 @@ void dlm_clear_toss_list(struct dlm_ls *ls)
int i;
for (i = 0; i < ls->ls_rsbtbl_size; i++) {
write_lock(&ls->ls_rsbtbl[i].lock);
spin_lock(&ls->ls_rsbtbl[i].lock);
list_for_each_entry_safe(r, safe, &ls->ls_rsbtbl[i].toss,
res_hashchain) {
if (dlm_no_directory(ls) || !is_master(r)) {
@ -783,7 +783,7 @@ void dlm_clear_toss_list(struct dlm_ls *ls)
dlm_free_rsb(r);
}
}
write_unlock(&ls->ls_rsbtbl[i].lock);
spin_unlock(&ls->ls_rsbtbl[i].lock);
}
}