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Date: Thu, 10 May 2001 21:19:13 +0100
From: "Stephen C. Tweedie" <sct@redhat.com>
To: Marcelo Tosatti <marcelo@conectiva.com.br>
Cc: "Stephen C. Tweedie" <sct@redhat.com>, Mark Hemment <markhe@veritas.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] allocation looping + kswapd CPU cycles
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In-Reply-To: <20010510205204.O16590@redhat.com> <Pine.LNX.4.21.0105101517050.19732-100000@freak.distro.conectiva>
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In-Reply-To: <Pine.LNX.4.21.0105101517050.19732-100000@freak.distro.conectiva>; from marcelo@conectiva.com.br on Thu, May 10, 2001 at 03:22:57PM -0300
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Hi,

On Thu, May 10, 2001 at 03:22:57PM -0300, Marcelo Tosatti wrote:

> Initially I thought about __GFP_FAIL to be used by writeout routines which
> want to cluster pages until they can allocate memory without causing any
> pressure to the system. Something like this: 
> 
> while ((page = alloc_page(GFP_FAIL))
> 	add_page_to_cluster(page);
> write_cluster(); 

Isn't that an orthogonal decision?  You can use __GFP_FAIL with or
without __GFP_WAIT or __GFP_IO, whichever is appropriate.

Cheers,
 Stephen