linux-kernel - Re: [PATCH 1/1] mmap: Don't count shmem pages as free in __vm_enough

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Message-ID: <CAEwNFnD5=DEX1_iTZ4=7-1j4_r4hxMOsCb=NBT6EHYGFvH7fig@mail.gmail.com>
Date:	Mon, 4 Jul 2011 12:48:48 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	"Dmitry Fink (Palm GBU)" <Dmitry.Fink@...m.com>
Cc:	Dmitry Fink <finikk@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] mmap: Don't count shmem pages as free in __vm_enough_memory

On Mon, Jul 4, 2011 at 12:10 PM, Dmitry Fink (Palm GBU)
<Dmitry.Fink@...m.com> wrote:
> If I understand the logic correctly, even systems with swap set to
> OVERCOMMIT_GUESS are equally affected,
> what we are trying to do here is count the amount of immediately available
> and
> "potentially" available space both in memory and in swap. shmem is not
> immediately
> available, but it is not potentially available either, even if we swap it
> out, it will
> just be relocated from memory into swap, total amount of immediate and
> potentially
> available memory is not going to be affected, so we shouldn't count it as
> available
> in the first place.

Agree. I think this is good one rather than old description.

-- 
Kind regards,
Minchan Kim
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