From: Jan Blunck <j.blunck@tu-harburg.de>
To: Alex Tomas <alex@clusterfs.com>
Cc: Alexander Viro <viro@parcelfarce.linux.theplanet.co.uk>,
Linux-Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [RFC] pdirops: vfs patch
Date: Tue, 22 Feb 2005 14:41:58 +0100 [thread overview]
Message-ID: <1109079718.421b36a621d16@webmail.tu-harburg.de> (raw)
In-Reply-To: <m3r7j8wwy2.fsf@bzzz.home.net>
Quoting Alex Tomas <alex@clusterfs.com>:
> >>>>> Jan Blunck (JB) writes:
>
> JB> i_sem does NOT protect the dcache. Also not in real_lookup(). The lock
> must be
> JB> acquired for ->lookup() and because we might sleep on i_sem, we have to
> get it
> JB> early and check for repopulation of the dcache.
>
> dentry is part of dcache, right? i_sem protects dentry from being
> returned with incomplete data inside, right?
>
Nope, d_alloc() is setting d_flags to DCACHE_UNHASHED. Therefore it is not found
by __d_lookup() until it is rehashed which is implicit done by ->lookup().
Jan
next prev parent reply other threads:[~2005-02-22 13:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-22 11:54 Jan Blunck
2005-02-22 12:04 ` Alex Tomas
2005-02-22 13:00 ` Jan Blunck
2005-02-22 13:23 ` Alex Tomas
2005-02-22 13:41 ` Jan Blunck [this message]
2005-02-23 13:55 ` Alex Tomas
-- strict thread matches above, loose matches on Subject: below --
2005-02-19 17:57 [RFC] parallel directory operations Alex Tomas
2005-02-19 18:04 ` [RFC] pdirops: vfs patch Alex Tomas
2005-02-20 23:35 ` Jan Blunck
2005-02-20 23:43 ` Alex Tomas
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