linux-kernel - Re: [PATCH 2/2] mm: make it clear that gfp reclaim modifiers are valid only for sleepable allocations

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Message-ID: <alpine.DEB.2.21.2004031241380.230548@chino.kir.corp.google.com>
Date:   Fri, 3 Apr 2020 12:41:51 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     Michal Hocko <mhocko@...nel.org>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Neil Brown <neilb@...e.de>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...e.com>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: Re: [PATCH 2/2] mm: make it clear that gfp reclaim modifiers are
 valid only for sleepable allocations

On Fri, 3 Apr 2020, Michal Hocko wrote:

> From: Michal Hocko <mhocko@...e.com>
> 
> While it might be really clear to MM developers that gfp reclaim
> modifiers are applicable only to sleepable allocations (those with
> __GFP_DIRECT_RECLAIM) it seems that actual users of the API are not
> always sure. Make it explicit that they are not applicable for
> GFP_NOWAIT or GFP_ATOMIC allocations which are the most commonly used
> non-sleepable allocation masks.
> 
> Acked-by: Paul E. McKenney <paulmck@...nel.org>
> Signed-off-by: Michal Hocko <mhocko@...e.com>

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