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Date:   Thu, 13 Apr 2017 11:12:48 +0200
From:   Peter Zijlstra <>
To:     "Paul E. McKenney" <>
        Christoph Lameter <>,
        Pekka Enberg <>,
        David Rientjes <>,
        Joonsoo Kim <>,
Subject: Re: [PATCH tip/core/rcu 01/13] mm: Rename SLAB_DESTROY_BY_RCU to

On Wed, Apr 12, 2017 at 09:55:37AM -0700, Paul E. McKenney wrote:
> A group of Linux kernel hackers reported chasing a bug that resulted
> from their assumption that SLAB_DESTROY_BY_RCU provided an existence
> guarantee, that is, that no block from such a slab would be reallocated
> during an RCU read-side critical section.  Of course, that is not the
> case.  Instead, SLAB_DESTROY_BY_RCU only prevents freeing of an entire
> slab of blocks.

And that while we wrote a huge honking comment right along with it...

> [ paulmck: Add "tombstone" comments as requested by Eric Dumazet. ]

I cannot find any occurrence of "tomb" or "TOMB" in the actual patch,

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