yum install nginx
service nginx start

error.log:
2011/01/07 05:39:49 [emerg] 7180#0: eventfd() failed (38: Function not implemented)
2011/01/07 05:39:49 [alert] 7179#0: worker process 7180 exited with fatal code 2 and can not be respawn
2011/01/07 05:43:01 [emerg] 7296#0: eventfd() failed (38: Function not implemented)
2011/01/07 05:43:01 [alert] 7295#0: worker process 7296 exited with fatal code 2 and can not be respawn

[root@2hei.net /etc/nginx]# /usr/sbin/nginx -V
nginx version: nginx/0.8.53
built by gcc 4.1.2 20080704 (Red Hat 4.1.2-48)
TLS SNI support disabled
configure arguments: –user=nginx –group=nginx –prefix=/usr/share/nginx –sbin-path=/usr/sbin/nginx –conf-path=/etc/nginx/nginx.conf –error-log-path=/var/log/nginx/error.log –http-log-path=/var/log/nginx/access.log –http-client-body-temp-path=/var/lib/nginx/tmp/client_body –http-proxy-temp-path=/var/lib/nginx/tmp/proxy –http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi –http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi –http-scgi-temp-path=/var/lib/nginx/tmp/scgi –pid-path=/var/run/nginx.pid –lock-path=/var/lock/subsys/nginx –with-http_ssl_module –with-http_realip_module –with-http_addition_module –with-http_xslt_module –with-http_image_filter_module –with-http_geoip_module –with-http_sub_module –with-http_dav_module –with-http_flv_module –with-http_gzip_static_module –with-http_random_index_module –with-http_secure_link_module –with-http_degradation_module –with-http_stub_status_module –with-http_perl_module –with-mail –with-file-aio –with-mail_ssl_module –with-ipv6 –with-cc-opt=’-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector –param=ssp-buffer-size=4 -m64 -mtune=generic’ –with-cc-opt=’-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector –param=ssp-buffer-size=4 -m64 -mtune=generic’

we can see –with-file-aio is been compiled at yum.

[root@2hei.net /etc/nginx]# yum list | grep aio
libaio.i386                              0.3.106-3.2            installed       
libaio.x86_64                            0.3.106-3.2            installed       
libsane-hpaio.x86_64                     1.6.7-4.1.el5.4        installed       
libaio-devel.x86_64                      0.3.106-3.2            base            
libaio-devel.i386                        0.3.106-3.2            base   

yum install libaio-devel
restart nginx still has such error.

Got a new stable version of nginx
nginx version: nginx/0.8.54
built by gcc 4.1.2 20080704 (Red Hat 4.1.2-48)
TLS SNI support disabled
configure arguments: –user=nginx –group=nginx –prefix=/usr/share/nginx –sbin-path=/usr/sbin/nginx –conf-path=/etc/nginx/nginx.conf –error-log-path=/var/log/nginx/error.log –http-log-path=/var/log/nginx/access.log –http-client-body-temp-path=/var/lib/nginx/tmp/client_body –http-proxy-temp-path=/var/lib/nginx/tmp/proxy –http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi –pid-path=/var/run/nginx.pid –lock-path=/var/lock/subsys/nginx –with-http_ssl_module –with-http_realip_module –with-http_addition_module –with-http_sub_module –with-http_dav_module –with-http_flv_module –with-http_gzip_static_module –with-http_stub_status_module –with-http_perl_module –with-mail –with-mail_ssl_module –with-cc-opt=’-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector –param=ssp-buffer-size=4 -m64 -mtune=generic’ –add-module=/builddir/build/BUILD/nginx-0.8.54/nginx-upstream-fair
download link: nginx-stable-0.8.54-1.el5.x86_64.rpm
useful link:
http://forum.nginx.org/read.php?2,23577,153119#msg-153119
http://forum.nginx.org/read.php?2,150853,150853

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