From a8b373eefc82094ba84bf35a770cdb21196224e4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sat, 8 Feb 2020 09:14:11 -0500 Subject: [PATCH] NFS: Limit the size of the access cache by default Currently, we have no real limit on the access cache size (we set it to ULONG_MAX). That can lead to credentials getting pinned for a very long time on lots of files if you have a system with a lot of memory. Signed-off-by: Trond Myklebust --- fs/nfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 5e23855e8097..f22366f350a9 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -2309,7 +2309,7 @@ static DEFINE_SPINLOCK(nfs_access_lru_lock); static LIST_HEAD(nfs_access_lru_list); static atomic_long_t nfs_access_nr_entries; -static unsigned long nfs_access_max_cachesize = ULONG_MAX; +static unsigned long nfs_access_max_cachesize = 4*1024*1024; module_param(nfs_access_max_cachesize, ulong, 0644); MODULE_PARM_DESC(nfs_access_max_cachesize, "NFS access maximum total cache length");