From: Hugh Dickins <hugh@veritas.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>,
linux-mm@kvack.org, mpm@selenic.com,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: build error: sparsemem + SLOB
Date: Tue, 21 Nov 2006 13:31:24 +0000 (GMT) [thread overview]
Message-ID: <Pine.LNX.4.64.0611211318520.12732@blonde.wat.veritas.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0611201321410.21552@schroedinger.engr.sgi.com>
On Mon, 20 Nov 2006, Christoph Lameter wrote:
> On Mon, 20 Nov 2006, Hugh Dickins wrote:
>
> > Lucky so far. Well, we'd actually have to be quite unlucky to ever
> > see what page_lock_anon_vma/SLAB_DESTROY_BY_RCU are guarding against.
>
> Hmmm... I had to repeatedly fix my new slab code when I broke
> DESTROY_BY_RCU. The machine wont even boot if that is not done right.
I'm intrigued, and a little worried: won't even boot! Do you have some
particular SGI monster in mind when you say "The machine"? Why was such a
narrow (preemption disabled) window in page_lock_anon_vma so vulnerable?
Swamped with many or slow-to-handle interrupts? Or was your slab code
grossly over-eager in trying to free pages?
Hugh
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prev parent reply other threads:[~2006-11-21 13:31 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-20 5:05 Randy Dunlap
2006-11-20 11:22 ` [PATCH]Re: " Yasunori Goto
2006-11-20 17:02 ` Randy Dunlap
2006-11-20 17:03 ` Christoph Lameter
2006-11-20 17:08 ` Randy Dunlap
2006-11-20 17:28 ` Hugh Dickins
2006-11-20 18:36 ` Matt Mackall
2006-11-21 5:57 ` Yasunori Goto
2006-11-21 6:59 ` Randy Dunlap
2006-11-21 13:34 ` Hugh Dickins
2006-11-21 19:14 ` Matt Mackall
2006-11-21 19:32 ` Christoph Lameter
2006-11-21 19:29 ` Matt Mackall
2006-11-21 19:54 ` Hugh Dickins
2006-11-20 21:22 ` Christoph Lameter
2006-11-21 13:31 ` Hugh Dickins [this message]
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