Got it. Thanks.
Best,
Tao
From: Lai Siyao [mailto:laisi...@whamcloud.com]
Sent: Tuesday, January 17, 2012 5:44 PM
To: Peng, Tao
Cc: gr...@whamcloud.com; Lustre-discuss@lists.lustre.org
Subject: Re: [Lustre-discuss] question about dcache revalidate
On Tue, Jan 17, 2012 at 5:13 PM, mailto:tao.p..
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, but set
> LUSTRE_DCACHE_INVALID flag.
> 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_INVALID flag. So in
> the race you mentioned, another proces
>
> > 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_INVALID flag. So in
> > the race you mentioned, anothe
