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handle move to LRU in retain_dentry()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-03-06 21:37:31 -05:00
parent a338579f2f
commit 62d9956cef
1 changed files with 6 additions and 13 deletions
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19
fs/dcache.c
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@ -440,17 +440,6 @@ static void d_lru_shrink_move(struct list_lru_one *lru, struct dentry *dentry,
list_lru_isolate_move(lru, &dentry->d_lru, list); list_lru_isolate_move(lru, &dentry->d_lru, list);
} }
/*
* dentry_lru_(add|del)_list) must be called with d_lock held.
*/
static void dentry_lru_add(struct dentry *dentry)
{
if (unlikely(!(dentry->d_flags & DCACHE_LRU_LIST)))
d_lru_add(dentry);
else if (unlikely(!(dentry->d_flags & DCACHE_REFERENCED)))
dentry->d_flags |= DCACHE_REFERENCED;
}
/** /**
* d_drop - drop a dentry * d_drop - drop a dentry
* @dentry: dentry to drop * @dentry: dentry to drop
@ -641,6 +630,12 @@ static inline bool retain_dentry(struct dentry *dentry)
if (dentry->d_op->d_delete(dentry)) if (dentry->d_op->d_delete(dentry))
return false; return false;
} }
/* retain; LRU fodder */
dentry->d_lockref.count--;
if (unlikely(!(dentry->d_flags & DCACHE_LRU_LIST)))
d_lru_add(dentry);
else if (unlikely(!(dentry->d_flags & DCACHE_REFERENCED)))
dentry->d_flags |= DCACHE_REFERENCED;
return true; return true;
} }
@ -823,8 +818,6 @@ repeat:
rcu_read_unlock(); rcu_read_unlock();
if (likely(retain_dentry(dentry))) { if (likely(retain_dentry(dentry))) {
dentry_lru_add(dentry);
dentry->d_lockref.count--;
spin_unlock(&dentry->d_lock); spin_unlock(&dentry->d_lock);
return; return;
} }