diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfscache.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 40db57eb2b06..2f9c2d26a2b9 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -302,8 +302,10 @@ nfsd_cache_search(struct svc_rqst *rqstp, __wsum csum) /* * Try to find an entry matching the current call in the cache. When none - * is found, we grab the oldest unlocked entry off the LRU list. - * Note that no operation within the loop may sleep. + * is found, we try to grab the oldest expired entry off the LRU list. If + * a suitable one isn't there, then drop the cache_lock and allocate a + * new one, then search again in case one got inserted while this thread + * didn't hold the lock. */ int nfsd_cache_lookup(struct svc_rqst *rqstp) @@ -344,6 +346,7 @@ nfsd_cache_lookup(struct svc_rqst *rqstp) } } + /* Drop the lock and allocate a new entry */ spin_unlock(&cache_lock); rp = nfsd_reply_cache_alloc(); if (!rp) { |