nfsd: don't halt scanning the DRC LRU list when there's an RC_INPROG entry

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / nfsd / nfscache.c

diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index f8f060f..6040da8 100644 (file)
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -224,13 +224,6 @@ hash_refile(struct svc_cacherep *rp)
        hlist_add_head(&rp->c_hash, cache_hash + hash_32(rp->c_xid, maskbits));
 }
 
-static inline bool
-nfsd_cache_entry_expired(struct svc_cacherep *rp)
-{
-       return rp->c_state != RC_INPROG &&
-              time_after(jiffies, rp->c_timestamp + RC_EXPIRE);
-}
-
 /*
  * Walk the LRU list and prune off entries that are older than RC_EXPIRE.
  * Also prune the oldest ones when the total exceeds the max number of entries.
@@ -242,8 +235,14 @@ prune_cache_entries(void)
        long freed = 0;
 
        list_for_each_entry_safe(rp, tmp, &lru_head, c_lru) {
-               if (!nfsd_cache_entry_expired(rp) &&
-                   num_drc_entries <= max_drc_entries)
+               /*
+                * Don't free entries attached to calls that are still
+                * in-progress, but do keep scanning the list.
+                */
+               if (rp->c_state == RC_INPROG)
+                       continue;
+               if (num_drc_entries <= max_drc_entries &&
+                   time_before(jiffies, rp->c_timestamp + RC_EXPIRE))
                        break;
                nfsd_reply_cache_free_locked(rp);
                freed++;