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# cp test2 test
cp: cannot create regular file `test': Text file busy
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# strace cp test2 test 2>&1 | grep open.*test
open("test2", O_RDONLY|O_LARGEFILE) = 3
open("test", O_WRONLY|O_TRUNC|O_LARGEFILE) = 4
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LinuxÓÉÓÚDemand Paging»úÖÆµÄ¹ØÏµ£¬±ØÐëÈ·±£ÕýÔÚÔËÐÐÖеijÌÐò¾µÏñ£¨×¢Ò⣬²¢·ÇÎļþ±¾Éí£©²»±»ÒâÍâÐ޸ģ¬Òò´ËÄÚºËÔÚÆô¶¯³ÌÐòºó»áËø¶¨Õâ¸ö³ÌÐò¾µÏñµÄinode¡£Õâ¾Í ÊÇΪʲôcpÔÚÓÓO_WRONLY|O_TRUNC”ģʽopenÄ¿±êÎļþʱ»áʧ°Ü¡£¶øÏÈrmÔÙcpµÄ»°£¬ÐÂÎļþµÄinodeÆäʵÒѾ¸Ä±äÁË£¬Ô inode²¢Ã»Óб»ÕæÕýɾ³ý£¬Ö±µ½ÄÚºËÊͷŶÔËüµÄÒýÓá£Í¬Àí£¬mvÖ»ÊǸıäÁËÎļþÃû£¬Æäinode²»±ä£¬ÐÂÎļþʹÓÃÁËеÄinode¡£
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#include <stdio.h>
int main(int argc, char * argv[])
{
foo(); // An export function by libtest.so.
sleep(1000);
return 0;
}
foo()ÊÇÁíÒ»¸ö²âÊÔ¶¯Ì¬¿âlibtest.soµÄµ¼³ö½Ó¿Ú£¬Ö»´òÓ¡Ò»ÐÐÌáʾ¾Í·µ»Ø¡£½ÓÏÂÀ´ÎÒ°ÑÉÏÃæ¶ÔÖ´ÐÐÎļþµÄ²âÊÔÓÃÀý¶Ô¶¯Ì¬¿âÓÖ×öÁËÒ»±é£º
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1. cd /root/homework/module
2. vi process.c
3. ¼ÓÈëÈçÏ´úÂ룺
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
static int process_init(void)
{
int num= ......
http://www.myzqu.com/viewthread.php?tid=56258&extra=page%3D1%26amp;filter%3Dtype%26amp;typeid%3D199
linux, FTP, ´î½¨·½·¨, ·þÎñÆ÷
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