linux-kernel - Re: [PATCH v3 3/5] page_alloc: Introduce zone_movable

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Message-ID: <1355368171.1436.1.camel@kernel.cn.ibm.com>
Date:	Wed, 12 Dec 2012 21:09:31 -0600
From:	Simon Jeons <simon.jeons@...il.com>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Jianguo Wu <wujianguo@...wei.com>, hpa@...or.com,
	akpm@...ux-foundation.org, wency@...fujitsu.com,
	laijs@...fujitsu.com, linfeng@...fujitsu.com, yinghai@...nel.org,
	isimatu.yasuaki@...fujitsu.com, rob@...dley.net,
	kosaki.motohiro@...fujitsu.com, minchan.kim@...il.com,
	mgorman@...e.de, rientjes@...gle.com, rusty@...tcorp.com.au,
	lliubbo@...il.com, jaegeuk.hanse@...il.com, tony.luck@...el.com,
	glommer@...allels.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v3 3/5] page_alloc: Introduce zone_movable_limit[] to
 keep movable limit for nodes

On Thu, 2012-12-13 at 09:48 +0800, Tang Chen wrote:
> On 12/13/2012 08:28 AM, Simon Jeons wrote:
> > On Wed, 2012-12-12 at 18:32 +0800, Tang Chen wrote:
> >> Hi Simon,
> >>
> >> On 12/12/2012 05:29 PM, Simon Jeons wrote:
> >>>
> >>> Thanks for your clarify.
> >>>
> >>> Enable PAE on x86 32bit kernel, 8G memory, movablecore=6.5G
> >>
> >> Could you please provide more info ?
> >>
> >> Such as the whole kernel commondline. And did this happen after
> >> you applied these patches ? What is the output without these
> >> patches ?
> >
> > This result is without the patches, I didn't add more kernel
> > commandline, just movablecore=6.5G, but output as you see is strange, so
> > what happened?
> 
> Hi Simon,
> 
> For now, I'm not quite sure what happened. Could you please provide the
> output without the movablecore=6.5G option ?
> 
> Seeing from your output, your totalpages=2051391, which is about 8G. But
> the memory mapped for your node 0 is obviously not enough.
> 
> When we have high memory, ZONE_MOVABLE is taken from ZONE_HIGH. So the
> first line, 8304MB HIGHMEM available is also strange.
> 
> So I think we need more info to find out the problem. :)
> 

[    0.000000] 8304MB HIGHMEM available.
[    0.000000] 885MB LOWMEM available.
[    0.000000]   mapped low ram: 0 - 375fe000
[    0.000000]   low ram: 0 - 375fe000
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x00010000-0x00ffffff]
[    0.000000]   Normal   [mem 0x01000000-0x375fdfff]
[    0.000000]   HighMem  [mem 0x375fe000-0x3e5fffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x00010000-0x0009cfff]
[    0.000000]   node   0: [mem 0x00100000-0x1fffffff]
[    0.000000]   node   0: [mem 0x20200000-0x3fffffff]
[    0.000000]   node   0: [mem 0x40200000-0xb69cbfff]
[    0.000000]   node   0: [mem 0xb6a46000-0xb6a47fff]
[    0.000000]   node   0: [mem 0xb6b1c000-0xb6cfffff]
[    0.000000]   node   0: [mem 0x00000000-0x3e5fffff]
[    0.000000] On node 0 totalpages: 2051391
[    0.000000] free_area_init_node: node 0, pgdat c0c2cc00, node_mem_map
f19c2200
[    0.000000]   DMA zone: 32 pages used for memmap
[    0.000000]   DMA zone: 0 pages reserved
[    0.000000]   DMA zone: 3949 pages, LIFO batch:0
[    0.000000]   Normal zone: 1740 pages used for memmap
[    0.000000]   Normal zone: 220466 pages, LIFO batch:31
[    0.000000]   HighMem zone: 16609 pages used for memmap
[    0.000000]   HighMem zone: 1808595 pages, LIFO batch:31


menuentry 'Fedora (3.7.0+)' --class fedora --class gnu-linux --class gnu
--class os $menuentry_id_option
'gnulinux-simple-7ed9528d-006f-4d9e-93d9-f68b0967ca99' {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1
--hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'
eba9dfce-d7f1-4b5c-9199-f2abf80e5dc6
        else
          search --no-floppy --fs-uuid --set=root
eba9dfce-d7f1-4b5c-9199-f2abf80e5dc6
        fi
        echo 'Loading Fedora (3.7.0+)'
        linux   /vmlinuz-3.7.0+ root=/dev/mapper/vg_kernel-lv_root ro
rd.md=0 rd.dm=0 rd.lvm.lv=vg_kernel/lv_root SYSFONT=True  KEYTABLE=us
rd.luks=0 LANG=en_US.UTF-8 rd.lvm.lv=vg_kernel/lv_swap rhgb quiet
        echo 'Loading initial ramdisk ...'
        initrd /initramfs-3.7.0+.img
}


> Thank. :)
> 
> >
> >>
> >> Thanks. :)
> >>
> >>>>
> >>>> [    0.000000] 8304MB HIGHMEM available.
> >>>> [    0.000000] 885MB LOWMEM available.
> >>>> [    0.000000]   mapped low ram: 0 - 375fe000
> >>>> [    0.000000]   low ram: 0 - 375fe000
> >>>> [    0.000000] Zone ranges:
> >>>> [    0.000000]   DMA      [mem 0x00010000-0x00ffffff]
> >>>> [    0.000000]   Normal   [mem 0x01000000-0x375fdfff]
> >>>> [    0.000000]   HighMem  [mem 0x375fe000-0x3e5fffff]
> >>>> [    0.000000] Movable zone start for each node
> >>>> [    0.000000] Early memory node ranges
> >>>> [    0.000000]   node   0: [mem 0x00010000-0x0009cfff]
> >>>> [    0.000000]   node   0: [mem 0x00100000-0x1fffffff]
> >>>> [    0.000000]   node   0: [mem 0x20200000-0x3fffffff]
> >>>> [    0.000000]   node   0: [mem 0x40200000-0xb69cbfff]
> >>>> [    0.000000]   node   0: [mem 0xb6a46000-0xb6a47fff]
> >>>> [    0.000000]   node   0: [mem 0xb6b1c000-0xb6cfffff]
> >>>> [    0.000000]   node   0: [mem 0x00000000-0x3e5fffff]
> >>>> [    0.000000] On node 0 totalpages: 2051391
> >>>> [    0.000000] free_area_init_node: node 0, pgdat c0c26a80,
> >>>> node_mem_map
> >>>> f19de200
> >>>> [    0.000000]   DMA zone: 32 pages used for memmap
> >>>> [    0.000000]   DMA zone: 0 pages reserved
> >>>> [    0.000000]   DMA zone: 3949 pages, LIFO batch:0
> >>>> [    0.000000]   Normal zone: 1740 pages used for memmap
> >>>> [    0.000000]   Normal zone: 220466 pages, LIFO batch:31
> >>>> [    0.000000]   HighMem zone: 16609 pages used for memmap
> >>>> [    0.000000]   HighMem zone: 1808595 pages, LIFO batch:31
> >>>
> >>> Why zone movable disappear?
> >>>
> >>>
> >>>
> >>>
> >>
> >
> >
> >
> 


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