From: WANG Cong <xiyou.wangcong@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: kernelnewbies@nl.linux.org
Subject: Re: what is spinlock depth
Date: Tue, 1 Feb 2011 06:40:06 +0000 (UTC) [thread overview]
Message-ID: <ii89s6$8dp$1@dough.gmane.org> (raw)
In-Reply-To: AANLkTik4WQreo35jGLMQA16u+R-Ed036B3okrrx2nBGy@mail.gmail.com
On Mon, 31 Jan 2011 15:27:08 -0500, Sri Ram Vemulpali wrote:
> Hi all,
>
> I am reading spinlock code and looking at struct raw_spinlock. I found
> struct lockdep_map as member.
...
> Can anyone help me explain, how this struct helps the spinlock. Why do
> we need lockdepth.
Here "lockdep" is short for Lock Dependence, not Lock Depth.
We do have lock depth things, e.g. ->lock_depth of struct task_struct,
which means the nested level of BKL. But spinlock can't be nested.
prev parent reply other threads:[~2011-02-01 6:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-31 20:27 what is spinlock depth Sri Ram Vemulpali
2011-01-31 21:06 ` Jiri Slaby
2011-02-01 5:15 ` Rajat Sharma
2011-02-01 6:40 ` WANG Cong [this message]
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