From: "J. R. Okajima" <hooanon05@yahoo.co.jp>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
Christoph Hellwig <hch@infradead.org>,
Nick Piggin <npiggin@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: Q. locking order of dcache_lru_lock
Date: Mon, 11 Apr 2011 14:09:31 +0900 [thread overview]
Message-ID: <29946.1302498571@jrobl> (raw)
In-Reply-To: <1302369133.2388.1.camel@twins>
Peter Zijlstra:
> On Fri, 2011-04-08 at 22:20 +0900, J. R. Okajima wrote:
> >=20
> > When spin_trylock(&dentry->d_lock) successfully acquired d_lock, does
> > the violation of locking order happen (or a deadlock, in worse case)?=20
>
> No, since a trylock never actually blocks a deadlock cannot occur.
Ah, exactly. I had to be sleeping when I wrote about deadlock.
How about the locking order? Do you think d_lock after dcache_lru_lock
is a problem?
J. R. Okajima
next prev parent reply other threads:[~2011-04-11 5:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-08 13:20 Q. locking order of dcache_lru_lock J. R. Okajima
2011-04-09 17:12 ` Peter Zijlstra
2011-04-11 5:09 ` J. R. Okajima [this message]
2011-04-11 6:27 ` Dave Chinner
2011-04-11 8:30 ` Peter Zijlstra
2011-04-11 12:33 ` J. R. Okajima
2011-04-11 12:41 ` Peter Zijlstra
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