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Date: Wed, 25 Jun 2014 15:23:45 -0700
From: Dave Hansen <dave.hansen@intel.com>
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To: Konstantin Khlebnikov <koct9i@gmail.com>, linux-mm@kvack.org,
        Andrew Morton <akpm@linux-foundation.org>
CC: Hugh Dickins <hughd@google.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] mm: catch memory commitment underflow
References: <20140624201606.18273.44270.stgit@zurg> <20140624201614.18273.39034.stgit@zurg>
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On 06/24/2014 01:16 PM, Konstantin Khlebnikov wrote:
> reserve;
>  
> +#ifdef CONFIG_DEBUG_VM
> +	WARN_ONCE(percpu_counter_read(&vm_committed_as) <
> +			-(s64)vm_committed_as_batch * num_online_cpus(),
> +			"memory commitment underflow");
> +#endif

Why not use VM_WARN_ON_ONCE()?