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Hi all,
I have some problem in uClinux, please help me!!!!
I run uClinux on SH7263 processor. I have information about
memory:
root:/proc> cat meminfo
MemTotal: 14896 kB
MemFree: 10400 kB
Buffers: 672 kB
Cached: 336 kB
SwapCached: 0 kB
Active: 800 kB
Inactive: 208 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 14896 kB
LowFree: 10400 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
Mapped: 0 kB
Slab: 3328 kB
CommitLimit: 7448 kB
Committed_AS: 0 kB
PageTables: 0 kB
VmallocTotal: 0 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
I think free memory is 10400kb= 10.15M. But when I use simple code to
test:
While((mem=calloc(1,1024*1024))==NULL)
{
i++;
printf("Number of calloc %d\n",i);
}
The result:
root:/mnt> root:/mnt> ./test1
size of mem=1
size of mem=2
size of mem=3
size of mem=4
oom-killer: gfp_mask=0x40d0, order=9
Call trace:
[<0c024bde>] out_of_memory+0x2e/0x154
[<0c0c08a8>] cond_resched+0x0/0x94
[<0c025c3c>] __alloc_pages+0x1d0/0x29c
[<0c025c4c>] __alloc_pages+0x1e0/0x29c
[<0c0c08a8>] cond_resched+0x0/0x94
[<0c02cbf4>] cache_alloc_refill+0x238/0x428
[<0c02cf2a>] __kmalloc+0x5a/0x80
[<0c02b722>] do_mmap_pgoff+0x4a8/0x7b2
[<0c08725c>] write_chan+0x0/0x2fc
[<0c02fb56>] vfs_write+0x6e/0xe0
[<0c004ecc>] old_mmap+0x6c/0xc0
[<0c00647c>] syscall_call+0xe/0x10
[<0c004e60>] old_mmap+0x0/0xc0
Mem-info:
DMA per-cpu: empty
DMA32 per-cpu: empty
Normal per-cpu:
cpu 0 hot: high 0, batch 1 used:0
cpu 0 cold: high 0, batch 1 used:0
HighMem per-cpu: empty
Free pages: 3040kB (0kB HighMem)
Active:92 inactive:76 dirty:0 writeback:0 unstable:0 free:760 slab:2757
mapped:0
pagetables:0
DMA free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB
present:0kB pages_
scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 16 16
DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB
present:0kB page
s_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 16 16
Normal free:3040kB min:512kB low:2176kB high:2304kB active:368kB
inactive:304kB
present:16384kB pages_scanned:805 all_unreclaimable? yes
lowmem_reserve[]: 0 0 0 0
HighMem free:0kB min:128kB low:512kB high:512kB active:0kB inactive:0kB
present:
0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
DMA: empty
DMA32: empty
Normal: 6*4kB 13*8kB 6*16kB 4*32kB 4*64kB 1*128kB 1*256kB 0*512kB
0*1024kB 1*204
8kB 0*4096kB = 3040kB
HighMem: empty
Free swap: 0kB
4096 pages of RAM
372 reserved pages
6 pages shared
0 pages swap cached
Out of Memory: Kill process 47 (test1) score 64 and children.
Out of memory: Killed process 47 (test1).
Killed
I don't know, I just allocate mem*1024*1024= 4*1024*1024=4MB. Why does
it appear error "Out of Memory" ???
Please help me!
An Ho
Best.
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