Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock()

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To: Jeremy Fitzhardinge <jeremy@...>

Cc: Peter Zijlstra <a.p.zijlstra@...>, David Miller <davem@...>, <hugh@...>, <mingo@...>, <akpm@...>, <linux-kernel@...>, <davej@...>

Subject: Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock()

Date: Monday, August 4, 2008 - 3:31 pm

On Mon, 4 Aug 2008, Jeremy Fitzhardinge wrote:
quoted text> 
> OK.  I don't actually need to do this, but I was asking for completeness.  But
> to clarify, you only need to do the reverse unlock if you do it after
> unlocking the outer lock?  If you're still holding the outer lock, you can
> unlock in any order?

Release order should always be totally irrelevant, whether you hold outer 
locks or not. Only the order of _getting_ locks matter.

And yes, if there is an outer lock, even the order of getting locks is 
irrelevant, as long as anybody who gets more than one inner lock always 
holds the outer one.

		Linus
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Messages in current thread:

[RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 9:03 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Thu Aug 7, 7:25 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Jeremy Fitzhardinge, (Mon Aug 4, 2:06 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 2:54 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Jeremy Fitzhardinge, (Mon Aug 4, 3:26 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Linus Torvalds, (Mon Aug 4, 3:31 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Steven Rostedt, (Wed Oct 8, 11:27 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Nick Piggin, (Wed Oct 8, 11:52 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Steven Rostedt, (Wed Oct 8, 1:18 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Linus Torvalds, (Wed Oct 8, 11:43 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Steven Rostedt, (Wed Oct 8, 12:03 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Linus Torvalds, (Wed Oct 8, 12:19 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Steven Rostedt, (Wed Oct 8, 12:53 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Jeremy Fitzhardinge, (Mon Aug 4, 4:16 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 3:39 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Roland Dreier, (Mon Aug 4, 10:07 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 10:19 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Roland Dreier, (Mon Aug 4, 10:26 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 10:32 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Dave Jones, (Mon Aug 4, 10:53 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 10:56 am)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Andrea Arcangeli, (Mon Aug 4, 12:26 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 12:38 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), David Miller, (Mon Aug 4, 5:32 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Andrea Arcangeli, (Mon Aug 4, 1:27 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Peter Zijlstra, (Mon Aug 4, 2:48 pm)

Re: [RFC][PATCH 7/7] lockdep: spin_lock_nest_lock(), Andrea Arcangeli, (Mon Aug 4, 1:46 pm)

[PATCH] workaround minor lockdep bug triggered by mm_take_al..., Andrea Arcangeli, (Mon Aug 4, 1:57 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Peter Zijlstra, (Mon Aug 4, 2:48 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 4:15 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Peter Zijlstra, (Mon Aug 4, 4:37 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 5:09 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Roland Dreier, (Mon Aug 4, 10:00 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 10:18 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Roland Dreier, (Tue Aug 5, 8:02 am)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Tue Aug 5, 8:20 am)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., David Miller, (Mon Aug 4, 5:57 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Arjan van de Ven, (Mon Aug 4, 5:27 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 5:54 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Pekka Enberg, (Mon Aug 4, 5:14 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 5:30 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Arjan van de Ven, (Mon Aug 4, 5:42 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 6:30 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Arjan van de Ven, (Mon Aug 4, 7:38 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 8:47 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrew Morton, (Mon Aug 4, 5:41 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Andrea Arcangeli, (Mon Aug 4, 6:12 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Roland Dreier, (Mon Aug 4, 2:56 pm)

Re: [PATCH] workaround minor lockdep bug triggered by mm_tak..., Peter Zijlstra, (Mon Aug 4, 3:05 pm)

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