Problems with 0.9.1 on not so recent Linux kernels.

António P. P. Almeida appa at
Wed Dec 1 20:07:51 MSK 2010

I'm wondering if I'm the only one having this experience.

I created my own .deb of 0.9.1 and installed on my dev machines and on
Linode. Everything is working perfectly.

In both cases I'm running a fairly recent kernel >= 2.6.32.

Then I tried in machines running a 2.6.26 and there I had problems.
When trying to access a site, one of the worker processes grabs 100%
CPU utilization and the error file gets filed with:

    accept() failed (38: Function not implemented)

It grows until exhausting the available disk space.

No pages are served whatsoever. I'm guessing that this is an issue
with a syscall that is missing in those kernel versions, but present
in the newer versions.

I reverted back to 0.8.53 in both machines.

Anyone else experienced this? Igor, Maxim or other nginx
insiders. Does 0.9.1 makes use of a Linux syscall available only in
recent kernels?

--- appa

Here'a an ldd of the nginx binary. =>  (0xffffe000) => /lib/ (0x77869000) => /lib/ (0x77836000) => /usr/lib/i686/cmov/ (0x777eb000) => /usr/lib/i686/cmov/ (0x77693000) => /lib/ (0x7768f000) => /usr/lib/ (0x7767b000) => /usr/lib/ (0x77643000) => /lib/ (0x774fe000)
        /lib/ (0x778b4000)

And here's the dpkg -s:

Package: nginx
Status: install ok installed
Priority: optional
Section: httpd
Installed-Size: 668
Maintainer: António Almeida <appa at>
Architecture: i386
Version: 0.9.1-perusio.1.0
Provides: httpd
Depends: libc6 (>= 2.10), libgeoip1 (>= 1.4.7~beta6+dfsg), libpcre3 (>= 7.7), libssl0.9.8 (>= 0.9.8m-1), zlib1g (>= 1:1.1.4), lsb-base (>= 3.2-14)
 /etc/nginx/sites-available/default 137b379dde77d0ac93cc84c9abf0d5b0
 /etc/nginx/fastcgi_params 822165a5f2bed79b8e0fdac84b97066e
 /etc/nginx/koi-utf 3e338aca6a53a5420fc791b5ef86f64c
 /etc/nginx/koi-win bfa0b80381fed2b1dfcf617b0ba204ec
 /etc/nginx/mime.types ab2c1c55348970968afec4b3414add77
 /etc/nginx/nginx.conf 7bf139588b5ecd5956f986c9c1442d44
 /etc/nginx/win-utf 3749ffe19bedd842eb87e83d544e5ce6
 /etc/bash_completion.d/nginx-ensite 5ec3515949ba03272cfc48d46c25f94f
 /etc/init.d/nginx 03f3eee584dd80647105e426bf100c5d
 /etc/logrotate.d/nginx 607ba9e6ed50716bd899f984eb24c75c
Description: small, but very powerful and efficient web server and mail proxy
 Nginx (engine x) is a web server created by Igor Sysoev and kindly provided to
 the open-source community. This server can be used as standalone HTTP server
 and as a reverse proxy server before some Apache or another big server to
 reduce load to backend servers by many concurrent HTTP-sessions.
 It can also act as a POP3/IMAP mail proxy with SSL and TLS SNI support.
 This is a custom version built with upload progress and without WebDAV, SSI, uwsgi and scgi support.

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