我的linux-3.0内核在启动时惊慌地说ERROR: Failed to allocate 0x1000 bytes below 0x0.。所以我更改了bootargs并添加了一个引导参数mem = 16M。现在它启动很好，但需要很长时间才能启动。我尝试过更高的mem值，但它不起作用。以下是日志：
`Machine: KZM9D
arm_add_memory: 0 0x40000000 0x1000000
Memory policy: ECC disabled, Data cache writealloc
bootmem_init: max_low=0x266240, max_high=0x266240
<6>Section 8256 and 8250 (node 0)<c> have a circular dependency on usemap and pgdat allocations
<7>On node 0 totalpages: 0
<7>On node 1 totalpages: 0
<7>On node 2 totalpages: 0
<7>On node 3 totalpages: 0
<7>On node 4 totalpages: 0
<7>On node 5 totalpages: 0
<7>On node 6 totalpages: 0
<7>On node 7 totalpages: 0
high_memory: e0000000
Zone PFN ranges:
Normal 0x00040000 -> 0x00041000
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
0: 0x00040000 -> 0x00041000
<7>On node 0 totalpages: 4096
<7> Normal zone: 36 pages used for memmap
<7> Normal zone: 0 pages reserved
<7> Normal zone: 4060 pages, LIFO batch:0
<6>boottime: reserved memory at 0x40002000 size 0x2000
mm_init_owner
<6>PERCPU: Embedded 8 pages/cpu @c087f000 s9824 r8192 d14752 u32768
<7>pcpu-alloc: s9824 r8192 d14752 u32768 alloc=8*4096
<7>pcpu-alloc: [0] 0 [0] 1
build_all_zonelists
Built 1 zonelists in Node order, mobility grouping on. Total pages: 4060
Policy zone: Normal
page_alloc_init
<5>Kernel command line: console=ttyS1,115200n8 root=/dev/nfs ip=9.8.7.6 nfsroot=1.2.3.7:/tftpboot/arm/ rootwait rw mem=16M
parse_early_param
<6>PID hash table entries: 64 (order: -4, 256 bytes)
<6>Dentry cache hash table entries: 2048 (order: 2, 24576 bytes)
<6>Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
<6>Memory: 16MB = 16MB total
<5>Memory: 7824k/7824k available, 8560k reserved, 0K highmem
<5>Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
DMA : 0xffc00000 - 0xffe00000 ( 2 MB)
vmalloc : 0xe0800000 - 0xf0000000 ( 248 MB)
lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
modules : 0xbf000000 - 0xc0000000 ( 16 MB)
.text : 0xc0008000 - 0xc0704024 (7153 kB)
.init : 0xc0705000 - 0xc0740660 ( 238 kB)
.data : 0xc0742000 - 0xc078dc18 ( 304 kB)
.bss : 0xc078dc18 - 0xc07f2950 ( 404 kB)
<6>Preemptible hierarchical RCU implementation.
<6>NR_IRQS:374`