poll select

aio相关
http://lse.sourceforge.net/io/aio.html

jfs
http://en.wikipedia.org/wiki/JFS_(file_system)
xfs
http://xfs.org/index.php/XFS_Papers_and_Documentation
------------javaeye挂了还是升级升的不支持chrome14---页面错乱发布了新的
参考http://frenchleaf.iteye.com/blog/779086
apue12章 ：
非阻塞io，
1.如果是调用o p e n以获得该描述符，则可指定O_NONBLOCK标志
2.对于已经打开的一个描述符，则可调用f c n t l打开O_NONBLOCK文件状态标志
源码指向fig14.1：/apue.2e/advio/nonblockw.c
./nonblockw </etc/termcap >temp.file

#include "apue.h"
#include <errno.h>
#include <fcntl.h>

char    buf[500000];

int
main(void)
{
        int             ntowrite, nwrite;
        char    *ptr;

        ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
        fprintf(stderr, "read %d bytes\n", ntowrite);

        set_fl(STDOUT_FILENO, O_NONBLOCK);      /* set nonblocking */

        ptr = buf;
        while (ntowrite > 0) {
                errno = 0;
                nwrite = write(STDOUT_FILENO, ptr, ntowrite);
                fprintf(stderr, "nwrite = %d, errno = %d\n", nwrite, errno);

                if (nwrite > 0) {
                        ptr += nwrite;
                        ntowrite -= nwrite;
                }
        }

        clr_fl(STDOUT_FILENO, O_NONBLOCK);      /* clear nonblocking */

        exit(0);
}

flock锁：
fig14.6 -> lib/locktest.c