From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Huang Ying <ying.huang@intel.com>
Cc: Len Brown <lenb@kernel.org>,
linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>,
Tony Luck <tony.luck@intel.com>,
linux-acpi@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH -v3 3/4] lib, Make gen_pool memory allocator lockless
Date: Wed, 13 Apr 2011 17:07:57 -0400 [thread overview]
Message-ID: <20110413210757.GA11683@Krystal> (raw)
In-Reply-To: <1302684835-14133-4-git-send-email-ying.huang@intel.com>
* Huang Ying (ying.huang@intel.com) wrote:
[...]
> + * rcu_read_lock and rcu_read_unlock is not used int gen_pool_alloc,
> + * gen_pool_free, gen_pool_avail and gen_pool_size etc, because chunks
> + * are only added into pool, not deleted from pool unless the pool
> + * itself is destroyed. If chunk will be deleted from pool,
> + * rcu_read_lock and rcu_read_unlock should be uses in these
> + * functions.
So how do you protect between pool destruction and adding chunks into
the pool ?
Thanks,
Mathieu
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
next prev parent reply other threads:[~2011-04-13 21:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-13 8:53 [PATCH -v3 0/4] ACPI, APEI, GHES, printk support for recoverable error via NMI Huang Ying
2011-04-13 8:53 ` [PATCH -v3 1/4] Add Kconfig option ARCH_HAVE_NMI_SAFE_CMPXCHG Huang Ying
2011-04-13 8:53 ` [PATCH -v3 2/4] lib, Add lock-less NULL terminated single list Huang Ying
2011-04-13 21:10 ` Mathieu Desnoyers
2011-04-13 8:53 ` [PATCH -v3 3/4] lib, Make gen_pool memory allocator lockless Huang Ying
2011-04-13 21:07 ` Mathieu Desnoyers [this message]
2011-04-14 1:29 ` Huang Ying
2011-04-15 0:24 ` Huang Ying
2011-04-15 16:46 ` Mathieu Desnoyers
2011-04-15 17:43 ` Paul E. McKenney
2011-04-15 17:44 ` Mathieu Desnoyers
2011-04-18 11:42 ` huang ying
2011-04-18 11:42 ` huang ying
2011-04-13 8:53 ` [PATCH -v3 4/4] ACPI, APEI, GHES, printk support for recoverable error via NMI Huang Ying
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