From: Christoph Lameter <clameter@engr.sgi.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
dipankar@in.ibm.com, Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: PREEMPT_RCU breaks anon_vma locking ?
Date: Sat, 24 Feb 2007 16:13:47 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0702241612470.4891@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0702242203080.4370@blonde.wat.veritas.com>
On Sat, 24 Feb 2007, Hugh Dickins wrote:
> Two, in his SLUB thread it sounds like he's toying with mixing up kmem
> caches of similar sizes: that seems a really bad idea to me (for reasons
> Andi and others have made) and I expect it'll get dropped; but in case
> not, let's note that the anon_vma cache is one which would fare very
> badly from getting mixed in with others (lock would no longer remain
> a lock, list would no longer remain a list, across that race).
Dont worry DESTROY_BY_RCU slabs wont be mixed with those not marked
DESTROY_BY_RCU.
next prev parent reply other threads:[~2007-02-25 0:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-23 21:23 Oleg Nesterov
2007-02-23 22:41 ` Paul E. McKenney
2007-02-24 22:10 ` Hugh Dickins
2007-02-24 22:36 ` Paul E. McKenney
2007-02-24 22:04 ` Hugh Dickins
2007-02-24 22:53 ` Paul E. McKenney
2007-03-02 16:27 ` Hugh Dickins
2007-02-25 0:13 ` Christoph Lameter [this message]
2007-02-25 20:05 ` Oleg Nesterov
2007-02-26 1:53 ` Paul E. McKenney
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