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Subject: Re: Q. locking order of dcache_lru_lock
From: Peter Zijlstra <peterz@infradead.org>
To: "J. R. Okajima" <hooanon05@yahoo.co.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>, Christoph Hellwig <hch@infradead.org>,
        Nick Piggin <npiggin@suse.de>, linux-kernel@vger.kernel.org
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Date: Sat, 09 Apr 2011 19:12:13 +0200
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On Fri, 2011-04-08 at 22:20 +0900, J. R. Okajima wrote:
> 
> When spin_trylock(&dentry->d_lock) successfully acquired d_lock, does
> the violation of locking order happen (or a deadlock, in worse case)? 

No, since a trylock never actually blocks a deadlock cannot occur.