From: Peter Zijlstra <peterz@infradead.org>
To: npiggin@suse.de
Cc: akpm@linux-foundation.org, torvalds@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
benh@kernel.crashing.org, paulus@samba.org,
Paul E McKenney <paulmck@linux.vnet.ibm.com>
Subject: Re: [patch 3/7] mm: speculative page references
Date: Fri, 06 Jun 2008 16:20:04 +0200 [thread overview]
Message-ID: <1212762004.23439.119.camel@twins> (raw)
In-Reply-To: <20080605094825.699347000@nick.local0.net>
On Thu, 2008-06-05 at 19:43 +1000, npiggin@suse.de wrote:
> plain text document attachment (mm-speculative-get_page-hugh.patch)
> +static inline int page_cache_get_speculative(struct page *page)
> +{
> + VM_BUG_ON(in_interrupt());
> +
> +#ifndef CONFIG_SMP
> +# ifdef CONFIG_PREEMPT
> + VM_BUG_ON(!in_atomic());
> +# endif
> + /*
> + * Preempt must be disabled here - we rely on rcu_read_lock doing
> + * this for us.
Preemptible RCU is already in the tree, so I guess you'll have to
explcitly disable preemption if you require it.
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next prev parent reply other threads:[~2008-06-06 14:20 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-05 9:43 [patch 0/7] speculative page references, lockless pagecache, lockless gup npiggin
2008-06-05 9:43 ` [patch 1/7] mm: readahead scan lockless npiggin
2008-06-05 9:43 ` [patch 2/7] radix-tree: add gang_lookup_slot, gang_lookup_slot_tag npiggin
2008-06-05 9:43 ` [patch 3/7] mm: speculative page references npiggin
2008-06-06 14:20 ` Peter Zijlstra [this message]
2008-06-06 16:26 ` Nick Piggin
2008-06-06 16:27 ` Nick Piggin
2008-06-09 4:48 ` Tim Pepper
2008-06-10 19:08 ` Christoph Lameter
2008-06-11 3:19 ` Nick Piggin
2008-06-05 9:43 ` [patch 4/7] mm: lockless pagecache npiggin
2008-06-05 9:43 ` [patch 5/7] mm: spinlock tree_lock npiggin
2008-06-05 9:43 ` [patch 6/7] powerpc: implement pte_special npiggin
2008-06-06 4:04 ` Benjamin Herrenschmidt
2008-06-05 9:43 ` [patch 7/7] powerpc: lockless get_user_pages_fast npiggin
2008-06-09 8:32 ` Andrew Morton
2008-06-10 3:15 ` Nick Piggin
2008-06-10 19:00 ` Christoph Lameter
2008-06-11 3:18 ` Nick Piggin
2008-06-11 4:40 ` Christoph Lameter
2008-06-11 4:41 ` Christoph Lameter
2008-06-11 4:49 ` Nick Piggin
2008-06-11 6:06 ` Andrew Morton
2008-06-11 6:24 ` Nick Piggin
2008-06-11 6:50 ` Andrew Morton
2008-06-11 23:20 ` Christoph Lameter
2008-06-11 4:47 ` Nick Piggin
2008-06-05 11:53 ` [patch 0/7] speculative page references, lockless pagecache, lockless gup Nick Piggin
2008-06-05 17:33 ` Linus Torvalds
2008-06-06 0:08 ` Nick Piggin
2008-06-06 21:32 ` Peter Zijlstra
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