Merge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6...

[linux-2.6-block.git] / fs / nfsd / nfssvc.c

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 492c79b7800b5b7fcb4f8a8813b2d369a5039d7a..d68cd056b281b4ecde7830e2641168cca63d52b0 100644 (file)
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -66,6 +66,16 @@ struct timeval                       nfssvc_boot;
 DEFINE_MUTEX(nfsd_mutex);
 struct svc_serv                *nfsd_serv;
 
+/*
+ * nfsd_drc_lock protects nfsd_drc_max_pages and nfsd_drc_pages_used.
+ * nfsd_drc_max_pages limits the total amount of memory available for
+ * version 4.1 DRC caches.
+ * nfsd_drc_pages_used tracks the current version 4.1 DRC memory usage.
+ */
+spinlock_t     nfsd_drc_lock;
+unsigned int   nfsd_drc_max_mem;
+unsigned int   nfsd_drc_mem_used;
+
 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 static struct svc_stat nfsd_acl_svcstats;
 static struct svc_version *    nfsd_acl_version[] = {
@@ -235,13 +245,12 @@ void nfsd_reset_versions(void)
  */
 static void set_max_drc(void)
 {
-       /* The percent of nr_free_buffer_pages used by the V4.1 server DRC */
-       #define NFSD_DRC_SIZE_SHIFT     7
-       nfsd_serv->sv_drc_max_pages = nr_free_buffer_pages()
-                                               >> NFSD_DRC_SIZE_SHIFT;
-       nfsd_serv->sv_drc_pages_used = 0;
-       dprintk("%s svc_drc_max_pages %u\n", __func__,
-               nfsd_serv->sv_drc_max_pages);
+       #define NFSD_DRC_SIZE_SHIFT     10
+       nfsd_drc_max_mem = (nr_free_buffer_pages()
+                                       >> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE;
+       nfsd_drc_mem_used = 0;
+       spin_lock_init(&nfsd_drc_lock);
+       dprintk("%s nfsd_drc_max_mem %u \n", __func__, nfsd_drc_max_mem);
 }
 
 int nfsd_create_serv(void)