> > however, due to this, our nfs client issues LOOKUP rpcs which isn't
> > really needed in the most cases.
> 
> You surely need to do lookup before deleting a file - you are
> supposed to return ENOENT if it doesn't exist. docache only
> controls whether the last element is saved to cache, not
> if cache is used during the lookup. AFAICS you really
> don't want to put entry with DELETE op to cache - it will
> be removed soon anyway.
> 
> Jaromir

i think that you misunderstand how it works.
please read cache_lookup().
if MAKEENTRY is not specified, it removes the entry and return -1
so that non-cached lookup is performed.  it's needed for ufs because
ufs_lookup stores infomations into the in-core inode and following
ufs_remove uses them.

YAMAMOTO Takashi