[regression?] [resend] Memory zone info seems incomplete in boottime dmesg output

Frans Pop
2008-08-14T18:42:56Z

With 2.6.26 I get:
<snip>
Zone PFN ranges:
DMA 0 -> 4096
DMA32 4096 -> 1048576
Normal 1048576 -> 1048576
Movable zone start PFN for each node
early_node_map[4] active PFN ranges
0: 0 -> 159
0: 256 -> 521844
0: 521961 -> 521964
0: 521983 -> 521984
On node 0 totalpages: 521751
DMA zone: 56 pages used for memmap
DMA zone: 1271 pages reserved
DMA zone: 2672 pages, LIFO batch:0
DMA32 zone: 7081 pages used for memmap
DMA32 zone: 510671 pages, LIFO batch:31
Normal zone: 0 pages used for memmap
Movable zone: 0 pages used for memmap
</snip>

With 2.6.27-rc1 I only get pages listed for 2 zones (bottom part):
<snip>
Zone PFN ranges:
DMA 0x00000000 -> 0x00001000
DMA32 0x00001000 -> 0x00100000
Normal 0x00100000 -> 0x00100000
Movable zone start PFN for each node
early_node_map[4] active PFN ranges
0: 0x00000000 -> 0x0000009f
0: 0x00000100 -> 0x0007f674
0: 0x0007f6e9 -> 0x0007f6ec
0: 0x0007f6ff -> 0x0007f700
On node 0 totalpages: 521751
DMA zone: 2072 pages, LIFO batch:0
DMA32 zone: 506625 pages, LIFO batch:31
</snip>

Note that totalpages is the same and that for 2.6.26 the sum of pages for
all listed zones is equal to totalpages. Seems we've lost useful info
here.

I also seem to have "lost" 600 LIFO batch pages for DMA and 4000 for DMA32
between the kernel versions although that could be due to config changes
(I enabled some extra debugging options). Harder to tell though without
the info where they've gone...

Cheers,
FJP

P.S. As a user I really don't find the hex values easier to read/use than
the decimal values. Except maybe for the "Zone PFN ranges" where things
seem to be nicely aligned.