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From: Minchan Kim <minchan.kim@gmail.com>
To: "Dmitry Fink (Palm GBU)" <Dmitry.Fink@palm.com>
Cc: Dmitry Fink <finikk@gmail.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1] mmap: Don't count shmem pages as free in __vm_enough_memory
Date: Mon, 4 Jul 2011 12:48:48 +0900	[thread overview]
Message-ID: <CAEwNFnD5=DEX1_iTZ4=7-1j4_r4hxMOsCb=NBT6EHYGFvH7fig@mail.gmail.com> (raw)
In-Reply-To: <CA367A4F.1479D%dmitry.fink@palm.com>

On Mon, Jul 4, 2011 at 12:10 PM, Dmitry Fink (Palm GBU)
<Dmitry.Fink@palm.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

WARNING: multiple messages have this Message-ID (diff)
From: Minchan Kim <minchan.kim@gmail.com>
To: "Dmitry Fink (Palm GBU)" <Dmitry.Fink@palm.com>
Cc: Dmitry Fink <finikk@gmail.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1] mmap: Don't count shmem pages as free in __vm_enough_memory
Date: Mon, 4 Jul 2011 12:48:48 +0900	[thread overview]
Message-ID: <CAEwNFnD5=DEX1_iTZ4=7-1j4_r4hxMOsCb=NBT6EHYGFvH7fig@mail.gmail.com> (raw)
In-Reply-To: <CA367A4F.1479D%dmitry.fink@palm.com>

On Mon, Jul 4, 2011 at 12:10 PM, Dmitry Fink (Palm GBU)
<Dmitry.Fink@palm.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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  reply	other threads:[~2011-07-04  3:48 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-03 19:39 [PATCH 1/1] mmap: Don't count shmem pages as free in __vm_enough_memory Dmitry Fink
2011-07-03 19:39 ` Dmitry Fink
2011-07-04  0:43 ` Minchan Kim
2011-07-04  0:43   ` Minchan Kim
2011-07-04  3:10   ` Dmitry Fink (Palm GBU)
2011-07-04  3:10     ` Dmitry Fink (Palm GBU)
2011-07-04  3:48     ` Minchan Kim [this message]
2011-07-04  3:48       ` Minchan Kim
2011-07-08 22:22 ` Hugh Dickins
2011-07-08 22:22   ` Hugh Dickins
2011-07-09 20:42   ` [PATCH] mmap: Fix and tidy up overcommit page arithmetic Dmitry Fink
2011-07-09 20:42     ` Dmitry Fink
2011-07-09 20:55     ` Dmitry Fink
2011-07-09 20:55       ` Dmitry Fink
2011-07-10 23:08       ` Minchan Kim
2011-07-10 23:08         ` Minchan Kim
2011-07-11  1:41         ` Dmitry Fink
2011-07-11  1:41           ` Dmitry Fink
2011-07-11 17:33           ` Hugh Dickins
2011-07-11 17:33             ` Hugh Dickins

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