Home » Mailing list archives » linux-kernel » 2008 » October » 7

Re: [PATCH 3/3] Convert the UDP hash lock to RCU

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Peter Zijlstra
Subject: Re: [PATCH 3/3] Convert the UDP hash lock to RCU
Date: Tuesday, October 7, 2008 - 1:17 am

On Mon, 2008-10-06 at 23:22 +0200, Eric Dumazet wrote:


Be careful!, SLAB_DESTROY_BY_RCU just means the slab page gets
RCU-freed, this means that slab object pointers stay pointing to valid
memory, but it does _NOT_ mean those slab objects themselves remain
valid.

The slab allocator is free to re-use those objects at any time -
irrespective of the rcu-grace period. Therefore you will have to be able
to validate that the object you point to is indeed the object you
expect, otherwise strange and wonderful things will happen.

--
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[PATCH 3/3] Convert the UDP hash lock to RCU, Corey Minyard, (Mon Oct 6, 11:50 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Mon Oct 6, 2:22 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, David Miller, (Mon Oct 6, 2:40 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Corey Minyard, (Mon Oct 6, 3:07 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Corey Minyard, (Mon Oct 6, 4:08 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Mon Oct 6, 10:24 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Peter Zijlstra, (Tue Oct 7, 1:17 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Peter Zijlstra, (Tue Oct 7, 1:31 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Evgeniy Polyakov, (Tue Oct 7, 1:37 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Benny Amorsen, (Tue Oct 7, 1:54 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Tue Oct 7, 2:24 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Tue Oct 7, 5:59 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Stephen Hemminger, (Tue Oct 7, 7:07 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Christoph Lameter, (Tue Oct 7, 7:15 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Christoph Lameter, (Tue Oct 7, 7:16 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Evgeniy Polyakov, (Tue Oct 7, 7:29 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Paul E. McKenney, (Tue Oct 7, 7:33 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Paul E. McKenney, (Tue Oct 7, 7:36 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Paul E. McKenney, (Tue Oct 7, 7:38 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Christoph Lameter, (Tue Oct 7, 7:38 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Christoph Lameter, (Tue Oct 7, 7:45 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Tue Oct 7, 7:50 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Paul E. McKenney, (Tue Oct 7, 8:05 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Tue Oct 7, 8:07 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Paul E. McKenney, (Tue Oct 7, 8:07 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Peter Zijlstra, (Tue Oct 7, 8:09 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Christoph Lameter, (Tue Oct 7, 8:23 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Corey Minyard, (Tue Oct 7, 9:43 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, David Miller, (Tue Oct 7, 11:26 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, David Miller, (Tue Oct 7, 11:29 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, David Miller, (Tue Oct 7, 1:55 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Stephen Hemminger, (Tue Oct 7, 2:20 pm)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Wed Oct 8, 1:35 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, Eric Dumazet, (Wed Oct 8, 6:55 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, David Miller, (Wed Oct 8, 9:38 am)
Re: [PATCH 3/3] Convert the UDP hash lock to RCU, David Miller, (Wed Oct 8, 11:45 am)