On Tue, Jan 17, 2012 at 5:13 PM, wrote:
> > On Jan 12, 2012, at 3:52 AM, Lai Siyao wrote:
> >
> > > No, to add a dentry to hash client needs holding LOOKUP lock, but
> lustre client unhash (see
> > ll_unhash_aliases()) doesn't really remove dentry from hash, b
>
> > On Jan 12, 2012, at 3:52 AM, Lai Siyao wrote:
> >
> > > No, to add a dentry to hash client needs holding LOOKUP lock, but
> lustre client unhash (see
> > ll_unhash_aliases()) doesn't really remove dentry from hash, but set
> LUSTRE_DCACHE_INVAL
No, to add a dentry to hash client needs holding LOOKUP lock, but lustre
client unhash (see ll_unhash_aliases()) doesn't really remove dentry from
hash, but set LUSTRE_DCACHE_INVALID flag. So in the race you mentioned,
another process may add the dentry but later the lock is canceled soon, so
at th
