2.6.38-1207 (mem=463M@0x80000000 mem=512M@0xA0000000 = 943MB for system) during build of kernel:

[ 2945.114135] cc1: page allocation failure. order:3, mode:0x4020
[ 2945.114196] [<c005a420>] (unwind_backtrace+0x0/0xe0) from [<c0107e98>] (__alloc_pages_nodemask+0x5a0/0x6b4)
[ 2945.114227] [<c0107e98>] (__alloc_pages_nodemask+0x5a0/0x6b4) from [<c0107fbc>] (__get_free_pages+0x10/0x24)
[ 2945.114257] [<c0107fbc>] (__get_free_pages+0x10/0x24) from [<c012f494>] (kmalloc_order_trace+0x20/0xc8)
[ 2945.114288] [<c012f494>] (kmalloc_order_trace+0x20/0xc8) from [<c04882fc>] (__alloc_skb+0x50/0xe0)
[ 2945.114318] [<c04882fc>] (__alloc_skb+0x50/0xe0) from [<c038b2ec>] (rx_submit+0x24/0x1cc)
[ 2945.114349] [<c038b2ec>] (rx_submit+0x24/0x1cc) from [<c0395524>] (usb_hcd_giveback_urb+0xa0/0xec)
[ 2945.114379] [<c0395524>] (usb_hcd_giveback_urb+0xa0/0xec) from [<c03a1650>] (ehci_urb_done+0xa8/0xb4)
[ 2945.114410] [<c03a1650>] (ehci_urb_done+0xa8/0xb4) from [<c03a5488>] (qh_completions+0xb4/0x3d8)
[ 2945.114440] [<c03a5488>] (qh_completions+0xb4/0x3d8) from [<c03a5d94>] (scan_async+0x90/0x144)
[ 2945.114440] [<c03a5d94>] (scan_async+0x90/0x144) from [<c03a6504>] (ehci_work+0x30/0x88)
[ 2945.114471] [<c03a6504>] (ehci_work+0x30/0x88) from [<c03a83f0>] (ehci_irq+0x2f4/0x35c)
[ 2945.114471] [<c03a83f0>] (ehci_irq+0x2f4/0x35c) from [<c0394e90>] (usb_hcd_irq+0x38/0x7c)
[ 2945.114501] [<c0394e90>] (usb_hcd_irq+0x38/0x7c) from [<c00d89b4>] (handle_IRQ_event+0x9c/0x1b4)
[ 2945.114532] [<c00d89b4>] (handle_IRQ_event+0x9c/0x1b4) from [<c00da5dc>] (handle_level_irq+0xdc/0x160)
[ 2945.114562] [<c00da5dc>] (handle_level_irq+0xdc/0x160) from [<c004e088>] (asm_do_IRQ+0x88/0xc8)
[ 2945.114593] [<c004e088>] (asm_do_IRQ+0x88/0xc8) from [<c05bb128>] (__irq_usr+0x48/0x120)
[ 2945.114593] Exception stack(0xee37ffb0 to 0xee37fff8)
[ 2945.114593] ffa0:                                     00000001 00000019 00000000 00000000
[ 2945.114624] ffc0: 00000001 007cee74 42e3db80 00788550 00000001 00000000 00788550 42e3db80
[ 2945.114624] ffe0: 00000074 bed13ff0 000fd831 000fbbee 800f0030 ffffffff
[ 2945.114654] Mem-info:
[ 2945.114654] Normal per-cpu:
[ 2945.114654] CPU    0: hi:  186, btch:  31 usd: 156
[ 2945.114654] CPU    1: hi:  186, btch:  31 usd:  38
[ 2945.114654] HighMem per-cpu:
[ 2945.114685] CPU    0: hi:   90, btch:  15 usd:  54
[ 2945.114685] CPU    1: hi:   90, btch:  15 usd:   3
[ 2945.114685] active_anon:152413 inactive_anon:156 isolated_anon:0
[ 2945.114715]  active_file:26523 inactive_file:34377 isolated_file:0
[ 2945.114715]  unevictable:0 dirty:37 writeback:0 unstable:0
[ 2945.114715]  free:4833 slab_reclaimable:6423 slab_unreclaimable:1905
[ 2945.114715]  mapped:3752 shmem:352 pagetables:1798 bounce:0
[ 2945.114746] Normal free:18596kB min:3416kB low:4268kB high:5124kB active_anon:414312kB inactive_anon:0kB active_file:92764kB inactive_file:119716kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:730112kB mlocked:0kB dirty:136kB writeback:0kB mapped:8456kB shmem:8kB slab_reclaimable:25692kB slab_unreclaimable:7620kB kernel_stack:2688kB pagetables:7192kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 2945.114776] lowmem_reserve[]: 0 1776 1776
[ 2945.114807] HighMem free:736kB min:220kB low:484kB high:748kB active_anon:195340kB inactive_anon:624kB active_file:13328kB inactive_file:17792kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:227328kB mlocked:0kB dirty:12kB writeback:0kB mapped:6552kB shmem:1400kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 2945.114807] lowmem_reserve[]: 0 0 0
[ 2945.114837] Normal: 1045*4kB 856*8kB 461*16kB 0*32kB 1*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 18596kB
[ 2945.114868] HighMem: 70*4kB 7*8kB 11*16kB 3*32kB 0*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 736kB
[ 2945.114898] 61263 total pagecache pages
[ 2945.114898] 0 pages in swap cache
[ 2945.114898] Swap cache stats: add 0, delete 0, find 0/0
[ 2945.114898] Free swap  = 0kB
[ 2945.114929] Total swap = 0kB
[ 2945.189025] 249600 pages of RAM
[ 2945.189056] 6316 free pages
[ 2945.189056] 16522 reserved pages
[ 2945.189056] 5008 slab pages
[ 2945.189056] 117094 pages shared
[ 2945.189056] 0 pages swap cached