linux-kernel - Re: [RFC 1/4] mm: Clarify __GFP

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Message-ID: <alpine.DEB.2.10.1503021233550.20808@chino.kir.corp.google.com>
Date:	Mon, 2 Mar 2015 12:34:30 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Michal Hocko <mhocko@...e.cz>
cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Dave Chinner <david@...morbit.com>,
	Theodore Ts'o <tytso@....edu>, Mel Gorman <mgorman@...e.de>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	"David S. Miller" <davem@...emloft.net>,
	sparclinux@...r.kernel.org, Vipul Pandya <vipul@...lsio.com>,
	netdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 1/4] mm: Clarify __GFP_NOFAIL deprecation status

On Mon, 2 Mar 2015, Michal Hocko wrote:

> diff --git a/include/linux/gfp.h b/include/linux/gfp.h
> index 51bd1e72a917..0cf9c2772988 100644
> --- a/include/linux/gfp.h
> +++ b/include/linux/gfp.h
> @@ -57,8 +57,10 @@ struct vm_area_struct;
>   * _might_ fail.  This depends upon the particular VM implementation.
>   *
>   * __GFP_NOFAIL: The VM implementation _must_ retry infinitely: the caller
> - * cannot handle allocation failures.  This modifier is deprecated and no new
> - * users should be added.
> + * cannot handle allocation failures. New users should be evaluated carefuly
> + * (and the flag should be used only when there is no reasonable failure policy)
> + * but it is definitely preferable to use the flag rather than opencode endless
> + * loop around allocator.
>   *
>   * __GFP_NORETRY: The VM implementation must not retry indefinitely.
>   *

s/carefuly/carefully/

Acked-by: David Rientjes <rientjes@...gle.com>
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