From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-mm@kvack.org, piggin@cyberone.com.au, arjanv@redhat.com,
linux-kernel@vger.kernel.org, haveblue@us.ibm.com
Subject: Re: [RFC] memory defragmentation to satisfy high order allocations
Date: Fri, 1 Oct 2004 16:04:30 -0300 [thread overview]
Message-ID: <20041001190430.GA4372@logos.cnet> (raw)
In-Reply-To: <20041001131147.3780722b.akpm@osdl.org>
On Fri, Oct 01, 2004 at 01:11:47PM -0700, Andrew Morton wrote:
> Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote:
> >
> > The following patch implements a "coalesce_memory()" function
> > which takes "zone" and "order" as a parameter.
> >
> > It tries to move enough physically nearby pages to form a free area
> > of "order" size.
> >
> > It does that by checking whether the page can be moved, allocating a new page,
> > unmapping the pte's to it, copying data to new page, remapping the ptes,
> > and reinserting the page on the radix/LRU.
>
> Presumably this duplicates some of the memory hot-remove patches.
As far as I have researched, the memory moving/remapping code
on the hot remove patches dont work correctly. Please correct me.
And what I've seen (from the Fujitsu guys) was quite ugly IMHO.
> Apparently Dave Hansen has working and sane-looking hot remove code
> which is in a close-to-submittable state.
Dave?
WARNING: multiple messages have this Message-ID (diff)
From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-mm@kvack.org, piggin@cyberone.com.au, arjanv@redhat.com,
linux-kernel@vger.kernel.org, haveblue@us.ibm.com
Subject: Re: [RFC] memory defragmentation to satisfy high order allocations
Date: Fri, 1 Oct 2004 16:04:30 -0300 [thread overview]
Message-ID: <20041001190430.GA4372@logos.cnet> (raw)
In-Reply-To: <20041001131147.3780722b.akpm@osdl.org>
On Fri, Oct 01, 2004 at 01:11:47PM -0700, Andrew Morton wrote:
> Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote:
> >
> > The following patch implements a "coalesce_memory()" function
> > which takes "zone" and "order" as a parameter.
> >
> > It tries to move enough physically nearby pages to form a free area
> > of "order" size.
> >
> > It does that by checking whether the page can be moved, allocating a new page,
> > unmapping the pte's to it, copying data to new page, remapping the ptes,
> > and reinserting the page on the radix/LRU.
>
> Presumably this duplicates some of the memory hot-remove patches.
As far as I have researched, the memory moving/remapping code
on the hot remove patches dont work correctly. Please correct me.
And what I've seen (from the Fujitsu guys) was quite ugly IMHO.
> Apparently Dave Hansen has working and sane-looking hot remove code
> which is in a close-to-submittable state.
Dave?
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next prev parent reply other threads:[~2004-10-01 20:32 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-01 18:22 [RFC] memory defragmentation to satisfy high order allocations Marcelo Tosatti
2004-10-01 18:22 ` Marcelo Tosatti
2004-10-01 20:11 ` Andrew Morton
2004-10-01 20:11 ` Andrew Morton
2004-10-01 19:04 ` Marcelo Tosatti [this message]
2004-10-01 19:04 ` Marcelo Tosatti
2004-10-01 21:00 ` Andrew Morton
2004-10-01 21:00 ` Andrew Morton
2004-10-01 21:57 ` Dave Hansen
2004-10-01 21:57 ` Dave Hansen
2004-10-01 23:42 ` Marcelo Tosatti
2004-10-01 23:42 ` Marcelo Tosatti
2004-10-02 1:17 ` Andrew Morton
2004-10-02 1:17 ` Andrew Morton
2004-10-02 9:30 ` Hirokazu Takahashi
2004-10-02 9:30 ` Hirokazu Takahashi
2004-10-02 18:33 ` Marcelo Tosatti
2004-10-02 18:33 ` Marcelo Tosatti
2004-10-03 4:13 ` Hirokazu Takahashi
2004-10-03 4:13 ` Hirokazu Takahashi
2004-10-03 14:07 ` Marcelo Tosatti
2004-10-03 14:07 ` Marcelo Tosatti
2004-10-03 18:35 ` Hirokazu Takahashi
2004-10-03 18:35 ` Hirokazu Takahashi
2004-10-03 19:21 ` Trond Myklebust
2004-10-03 19:21 ` Trond Myklebust
2004-10-03 20:03 ` Hirokazu Takahashi
2004-10-03 20:03 ` Hirokazu Takahashi
2004-10-03 20:44 ` Trond Myklebust
2004-10-03 20:44 ` Trond Myklebust
2004-10-04 13:02 ` Hirokazu Takahashi
2004-10-04 13:02 ` Hirokazu Takahashi
2004-10-04 17:24 ` Marcelo Tosatti
2004-10-04 17:24 ` Marcelo Tosatti
2004-10-05 2:53 ` Hirokazu Takahashi
2004-10-05 2:53 ` Hirokazu Takahashi
2004-10-07 12:06 ` Marcelo Tosatti
2004-10-08 7:00 ` Hirokazu Takahashi
2004-10-08 10:00 ` Marcelo Tosatti
2004-10-08 12:23 ` Hirokazu Takahashi
2004-10-08 12:41 ` Marcelo Tosatti
2004-10-08 16:52 ` Hirokazu Takahashi
2004-10-08 15:36 ` Marcelo Tosatti
2004-10-12 10:56 ` IWAMOTO Toshihiro
2004-10-12 10:35 ` Marcelo Tosatti
2004-10-12 17:55 ` Hirokazu Takahashi
2004-10-12 14:26 ` Martin J. Bligh
2004-10-12 12:17 ` Marcelo Tosatti
2004-10-12 15:01 ` Dave Hansen
2004-10-04 3:24 ` IWAMOTO Toshihiro
2004-10-04 3:24 ` IWAMOTO Toshihiro
2004-10-04 2:22 ` Dave Hansen
2004-10-04 2:22 ` Dave Hansen
2004-10-05 16:46 ` [PATCH] mhp: transfer dirty tag at radix_tree_replace Marcelo Tosatti
2004-10-05 18:35 ` Dave Hansen
2004-10-06 7:39 ` Hirokazu Takahashi
2004-10-08 8:15 ` Hirokazu Takahashi
2004-10-08 20:36 ` Marcelo Tosatti
2004-10-04 4:09 ` [RFC] memory defragmentation to satisfy high order allocations IWAMOTO Toshihiro
2004-10-04 4:09 ` IWAMOTO Toshihiro
2004-10-04 17:29 ` Marcelo Tosatti
2004-10-04 17:29 ` Marcelo Tosatti
2004-10-02 2:30 ` Nick Piggin
2004-10-02 2:30 ` Nick Piggin
2004-10-02 3:08 ` Marcelo Tosatti
2004-10-02 3:08 ` Marcelo Tosatti
2004-10-04 8:15 ` Nick Piggin
2004-10-04 8:15 ` Nick Piggin
2004-10-02 2:41 ` Nick Piggin
2004-10-02 2:41 ` Nick Piggin
2004-10-02 3:50 ` Hirokazu Takahashi
2004-10-02 3:50 ` Hirokazu Takahashi
2004-10-02 16:06 ` Marcelo Tosatti
2004-10-02 16:06 ` Marcelo Tosatti
2004-10-04 2:38 ` Hiroyuki KAMEZAWA
2004-10-04 2:38 ` Hiroyuki KAMEZAWA
2004-10-04 17:32 ` Marcelo Tosatti
2004-10-04 17:32 ` Marcelo Tosatti
2004-10-04 6:58 ` Hiroyuki KAMEZAWA
2004-10-04 6:58 ` Hiroyuki KAMEZAWA
2004-10-07 15:58 ` memory hotplug and mem= Marcelo Tosatti
2004-10-07 18:36 ` Dave Hansen
2004-10-07 17:01 ` Marcelo Tosatti
2004-10-07 19:10 ` Dave Hansen
2004-10-07 20:25 ` Dave Hansen
-- strict thread matches above, loose matches on Subject: below --
2004-10-11 16:40 [RFC] memory defragmentation to satisfy high order allocations linux
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