Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / fs / jffs2 / README.Locking

diff --git a/fs/jffs2/README.Locking b/fs/jffs2/README.Locking
index 49771cf..b794343 100644 (file)
--- a/fs/jffs2/README.Locking
+++ b/fs/jffs2/README.Locking
@@ -1,4 +1,4 @@
-       $Id: README.Locking,v 1.9 2004/11/20 10:35:40 dwmw2 Exp $
+       $Id: README.Locking,v 1.12 2005/04/13 13:22:35 dwmw2 Exp $
 
        JFFS2 LOCKING DOCUMENTATION
        ---------------------------
@@ -108,6 +108,10 @@ in-core jffs2_inode_cache objects (each inode in JFFS2 has the
 correspondent jffs2_inode_cache object). So, the inocache_lock
 has to be locked while walking the c->inocache_list hash buckets.
 
+This spinlock also covers allocation of new inode numbers, which is
+currently just '++->highest_ino++', but might one day get more complicated
+if we need to deal with wrapping after 4 milliard inode numbers are used.
+
 Note, the f->sem guarantees that the correspondent jffs2_inode_cache
 will not be removed. So, it is allowed to access it without locking
 the inocache_lock spinlock.