Author: kib
Date: Fri Oct  8 07:17:22 2010
New Revision: 213543
URL: http://svn.freebsd.org/changeset/base/213543

Log:
  Add a comment describing the reason for calling cache_purge(fvp).
  
  Requested by: danfe
  MFC after:    6 days

Modified:
  head/sys/fs/msdosfs/msdosfs_vnops.c

Modified: head/sys/fs/msdosfs/msdosfs_vnops.c
==============================================================================
--- head/sys/fs/msdosfs/msdosfs_vnops.c Fri Oct  8 01:54:27 2010        
(r213542)
+++ head/sys/fs/msdosfs/msdosfs_vnops.c Fri Oct  8 07:17:22 2010        
(r213543)
@@ -1258,6 +1258,13 @@ abortit:
                }
        }
 
+       /*
+        * The msdosfs lookup is case insensitive. Several aliases may
+        * be inserted for a single directory entry. As a consequnce,
+        * name cache purge done by lookup for fvp when DELETE op for
+        * namei is specified, might be not enough to expunge all
+        * namecache entries that were installed for this direntry.
+        */
        cache_purge(fvp);
        VOP_UNLOCK(fvp, 0);
 bad:
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