Re: [PATCH] x86_32: trim memory by updating e820 v3
From: Mika Fischer
Date: Mon Apr 28 2008 - 05:44:49 EST
Yinghai Lu schrieb:
>>> you should get
>>>> reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1
>>>> reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
>>>> reg02: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1
>>>> reg03: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1
>>>> reg04: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
> please check
> http://lkml.org/lkml/2008/4/28/115
OK, this time it worked!
With mtrr_chunk_size=1g:
reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1
reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
reg02: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1
reg03: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1
reg04: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
Without mtrr_chunk_size=1g:
reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1
reg01: base=0x80000000 (2048MB), size= 512MB: write-back, count=1
reg02: base=0xa0000000 (2560MB), size= 256MB: write-back, count=1
reg03: base=0xb0000000 (2816MB), size= 256MB: write-back, count=1
reg04: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1
reg05: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1
reg06: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
Both seem equivalent and correct.
There are also no warnings anymore in the dmesg output:
With mtrr_chunk_size=1g:
http://bugzilla.kernel.org/attachment.cgi?id=15950
Without mtrr_chunk_size=1g:
http://bugzilla.kernel.org/attachment.cgi?id=15951
> also, can you try 64bit too?
I'm not sure how to do this. Can I compile it under 32bit Linux? If not that
will be difficult since I don't have space left for a 64bit installation on my
hard-drive. Maybe Gabiel C can test 64bit?
Regards,
Mika
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