raise max number of inodes for config tmpfs mount

1 files changed, 16 insertions, 2 deletions

diff --git a/etc/init.d/vyatta-router b/etc/init.d/vyatta-router
index c9b9786..87e96f7 100755
--- a/etc/init.d/vyatta-router
+++ b/etc/init.d/vyatta-router
@@ -188,8 +188,22 @@ mount_slash_config ()
 start ()
 {
     log_action_begin_msg "Mounting Vyatta Config"
-    mount -o nosuid,nodev,mode=775 -t tmpfs none ${vyatta_configdir} && \
-	chgrp ${GROUP} ${vyatta_configdir}
+    # ensure the vyatta_configdir supports a large number of inodes since
+    # the config hierarchy is often inode-bound (instead of size).
+    # impose a minimum and then scale up dynamically with the actual size
+    # of the system memory.
+    local tmem=$(sed -n 's/^MemTotal: \+\([0-9]\+\) kB$/\1/p' /proc/meminfo)
+    local tpages
+    local max_inodes=300000
+    if [ -n "$tmem" ]; then
+      (( tpages = tmem / 4 ))
+      if (( tpages > max_inodes )); then
+        (( max_inodes = tpages ))
+      fi
+    fi
+    local tmpfs_opts="nosuid,nodev,mode=775,nr_inodes=$max_inodes"
+    mount -o $tmpfs_opts -t tmpfs none ${vyatta_configdir} \
+      && chgrp ${GROUP} ${vyatta_configdir}
     log_action_end_msg $?
 
     disabled bootfile || init_bootfile