linux-kernel - Re: [PATCH] slab: prevent warnings when allocating with __GFP

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Message-ID: <0000013f341177d5-2328d812-f9a5-4626-970c-365489f690d5-000000@email.amazonses.com>
Date:	Tue, 11 Jun 2013 16:28:47 +0000
From:	Christoph Lameter <cl@...two.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	Sasha Levin <sasha.levin@...cle.com>,
	Pekka Enberg <penberg@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] slab: prevent warnings when allocating with
 __GFP_NOWARN

On Tue, 11 Jun 2013, Eric Dumazet wrote:

> Allowing a pipe to store thousands of page refs seems quite useless and
> dangerous.
>
> Having to use vmalloc()/vfree() for every splice()/vmsplice() would be a
> performance loss anyway.
>
> (fs/splice.c splice_grow_spd() will also want to allocate big kmalloc()
> chunks)

Why is it not using the page allocator for large allocations?

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