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svcrpc: minor cache cleanup

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Pull out some code into helper functions, fix a typo.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2010-08-26 13:19:52 -04:00
parent f16b6e8d83
commit 6610f720e9
2 changed files with 25 additions and 21 deletions
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44
net/sunrpc/cache.c
View File

@ -520,10 +520,26 @@ static void cache_restart_thread(struct cache_deferred_req *dreq, int too_many)
complete(&dr->completion);
}
static void __unhash_deferred_req(struct cache_deferred_req *dreq)
{
list_del_init(&dreq->recent);
list_del_init(&dreq->hash);
cache_defer_cnt--;
}
static void __hash_deferred_req(struct cache_deferred_req *dreq, struct cache_head *item)
{
int hash = DFR_HASH(item);
list_add(&dreq->recent, &cache_defer_list);
if (cache_defer_hash[hash].next == NULL)
INIT_LIST_HEAD(&cache_defer_hash[hash]);
list_add(&dreq->hash, &cache_defer_hash[hash]);
}
static int cache_defer_req(struct cache_req *req, struct cache_head *item)
{
struct cache_deferred_req *dreq, *discard;
int hash = DFR_HASH(item);
struct thread_deferred_req sleeper;
if (cache_defer_cnt >= DFR_MAX) {
@ -549,20 +565,14 @@ static int cache_defer_req(struct cache_req *req, struct cache_head *item)
spin_lock(&cache_defer_lock);
list_add(&dreq->recent, &cache_defer_list);
if (cache_defer_hash[hash].next == NULL)
INIT_LIST_HEAD(&cache_defer_hash[hash]);
list_add(&dreq->hash, &cache_defer_hash[hash]);
__hash_deferred_req(dreq, item);
/* it is in, now maybe clean up */
discard = NULL;
if (++cache_defer_cnt > DFR_MAX) {
discard = list_entry(cache_defer_list.prev,
struct cache_deferred_req, recent);
list_del_init(&discard->recent);
list_del_init(&discard->hash);
cache_defer_cnt--;
__unhash_deferred_req(discard);
}
spin_unlock(&cache_defer_lock);
@ -584,9 +594,7 @@ static int cache_defer_req(struct cache_req *req, struct cache_head *item)
*/
spin_lock(&cache_defer_lock);
if (!list_empty(&sleeper.handle.hash)) {
list_del_init(&sleeper.handle.recent);
list_del_init(&sleeper.handle.hash);
cache_defer_cnt--;
__unhash_deferred_req(&sleeper.handle);
spin_unlock(&cache_defer_lock);
} else {
/* cache_revisit_request already removed
@ -632,9 +640,8 @@ static void cache_revisit_request(struct cache_head *item)
dreq = list_entry(lp, struct cache_deferred_req, hash);
lp = lp->next;
if (dreq->item == item) {
list_del_init(&dreq->hash);
list_move(&dreq->recent, &pending);
cache_defer_cnt--;
__unhash_deferred_req(dreq);
list_add(&dreq->recent, &pending);
}
}
}
@ -657,11 +664,8 @@ void cache_clean_deferred(void *owner)
spin_lock(&cache_defer_lock);
list_for_each_entry_safe(dreq, tmp, &cache_defer_list, recent) {
if (dreq->owner == owner) {
list_del_init(&dreq->hash);
list_move(&dreq->recent, &pending);
cache_defer_cnt--;
}
if (dreq->owner == owner)
__unhash_deferred_req(dreq);
}
spin_unlock(&cache_defer_lock);

2
net/sunrpc/svc_xprt.c
View File

@ -665,7 +665,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
/* As there is a shortage of threads and this request
* had to be queue, don't allow the thread to wait so
* had to be queued, don't allow the thread to wait so
* long for cache updates.
*/
rqstp->rq_chandle.thread_wait = 1*HZ;