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Subjectfork returning Out of Memory (2.1.128)
While running following programs, after forking about 350 process, 
fork() returns Out of Memory, whereas I still have 576kbytes RAM free
and 96Mbytes free swap.

#include <errno.h>

main()
{
int i = 1;
for (;;) {
int pid;
if (!(pid = fork()))
for (;;)
sleep(3600);
if (pid == -1) {
printf("fork() returned %s\n", strerror(errno));
sleep(1);
} else
printf("Forked %dth process(%d)\n", i++, pid);
}
}

Nov 21 20:48:51 asterix kernel: SysRq: Show Memory
Nov 21 20:48:51 asterix kernel: Mem-info:
Nov 21 20:48:51 asterix kernel: Free pages: 576kB
Nov 21 20:48:51 asterix kernel: ( Free: 144 (48 96 144)
Nov 21 20:48:51 asterix kernel: 144*4kB 0*8kB 0*16kB 0*32kB 0*64kB
0*128kB = 576kB)
Nov 21 20:48:51 asterix kernel: Swap cache: add 9564/9564, delete
9524/9524, find 0/0
Nov 21 20:48:51 asterix kernel: Free swap: 96424kB
Nov 21 20:48:51 asterix kernel: 6144 pages of RAM
Nov 21 20:48:51 asterix kernel: 594 reserved pages
Nov 21 20:48:51 asterix kernel: 9865 pages shared
Nov 21 20:48:51 asterix kernel: 40 pages swap cached
Nov 21 20:48:51 asterix kernel: 0 pages in page table cache
Nov 21 20:48:51 asterix kernel: Buffer memory: 1228kB
Nov 21 20:48:51 asterix kernel: Buffer heads: 1264
Nov 21 20:48:51 asterix kernel: Buffer blocks: 1228
Nov 21 20:48:51 asterix kernel: CLEAN: 453 buffers, 40 used
(last=40), 0 locked, 0 protected, 0 dirty
Nov 21 20:48:51 asterix kernel: LOCKED: 766 buffers, 53 used
(last=761), 0 locked, 0 protected, 0 dirty
Nov 21 20:48:51 asterix kernel: Networking buffers in use :
0
Nov 21 20:48:51 asterix kernel: Total network buffer allocations :
1009
Nov 21 20:48:51 asterix kernel: Total failed network buffer allocs :
0
Nov 21 20:48:51 asterix kernel: IP fragment buffer size :
0


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