Re: Highmem emulation for 2.6?

[Michael Frank]

On Sun, 7 Mar 2004 13:59:40 +0100, Pavel Machek <pavel@xxxxxx> wrote:

> Does anyone have `subj`?

Enclosed patches is tested and works on UP wo ramdisk.

It was in -mm until Andrew dropped it due to it causing
problems on SMP, NUMA and with ramdisk.

Ramdisk expects to be at the end of lowmem zone so it
wont work in it's current implementation with this patch
when memory is shiften into highmem zone.

I'll be looking into fixes when less busy.

Regards
Michael

no highmem option

0MB HIGHMEM available.
495MB LOWMEM available.
On node 0 totalpages: 126960, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 122864 pages, LIFO batch:16, physical start address at: 0x1000000

highmem=1m

Warning highmem=1MB is too small and has been adjusted to: 8MB.
Warning bad highmem zone alignment 0x3f0000, highmem size will be adjusted.
Warning lowmem size adjusted  for zone alignment to: 488MB.
Warning highmem size adjusted for zone alignment to: 7MB.
7MB HIGHMEM available.
488MB LOWMEM available.
On node 0 totalpages: 126960, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 120832 pages, LIFO batch:16, physical start address at: 0x1000000
  HighMem zone: 2032 pages, LIFO batch:1, physical start address at: 0x1e800000

highmem=300m

Warning bad highmem zone alignment 0x3f0000, highmem size will be adjusted.
Warning lowmem size adjusted  for zone alignment to: 196MB.
Warning highmem size adjusted for zone alignment to: 299MB.
299MB HIGHMEM available.
196MB LOWMEM available.
On node 0 totalpages: 126960, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 46080 pages, LIFO batch:11, physical start address at: 0x1000000
  HighMem zone: 76784 pages, LIFO batch:16, physical start address at: 0xc400000

highmem=450m

Warning highmem size adjusted for a minimum of 64MB lowmem to: 431MB.
431MB HIGHMEM available.
64MB LOWMEM available.
On node 0 totalpages: 126960, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 12288 pages, LIFO batch:3, physical start address at: 0x1000000
  HighMem zone: 110576 pages, LIFO batch:16, physical start address at: 0x4000000

highmem=5000m

Warning highmem=5000MB is bigger than available 495MB and will be adjusted.
Warning highmem size adjusted for a minimum of 64MB lowmem to: 431MB.
431MB HIGHMEM available.
64MB LOWMEM available.
On node 0 totalpages: 126960, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 12288 pages, LIFO batch:3, physical start address at: 0x1000000
  HighMem zone: 110576 pages, LIFO batch:16, physical start address at: 0x4000000

mem=80m highmem=1m

Warning highmem=1MB is too small and has been adjusted to: 8MB.
8MB HIGHMEM available.
72MB LOWMEM available.
On node 0 totalpages: 20480, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 14336 pages, LIFO batch:3, physical start address at: 0x1000000
  HighMem zone: 2048 pages, LIFO batch:1, physical start address at: 0x4800000

mem=80m highmem=300m

Warning highmem=300MB is bigger than available 80MB and will be adjusted.
Warning highmem size adjusted for a minimum of 64MB lowmem to: 16MB.
16MB HIGHMEM available.
64MB LOWMEM available.
On node 0 totalpages: 20480, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 12288 pages, LIFO batch:3, physical start address at: 0x1000000
  HighMem zone: 4096 pages, LIFO batch:1, physical start address at: 0x4000000

mem=71m highmem=1m

Error highmem support requires at least 72MB but only 71MB are available.
0MB HIGHMEM available.
71MB LOWMEM available.
On node 0 totalpages: 18176, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 14080 pages, LIFO batch:3, physical start address at: 0x1000000

mem=72m highmem=10m

Warning highmem size adjusted for a minimum of 64MB lowmem to: 8MB.
8MB HIGHMEM available.
64MB LOWMEM available.
On node 0 totalpages: 18432, zones aligned at: 0x400000
  DMA zone: 4096 pages, LIFO batch:1, physical start address at: 0x0
  Normal zone: 12288 pages, LIFO batch:3, physical start address at: 0x1000000
  HighMem zone: 2048 pages, LIFO batch:1, physical start address at: 0x4000000

Attachment: highmem-equals-user-friendliness.patch
Description: Binary data