Re: [PATCH v3 3/5] page_alloc: Introduce zone_movable_limit[] tokeep movable limit for nodes

[Tang Chen]

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. :)

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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