Bug 67614

Summary:	32Bit border for /proc/net/dev counter on amd64
Product:	Gentoo Linux	Reporter:	André-Sebastian Liebe <master-andre>
Component:	[OLD] Core system	Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel>
Status:	VERIFIED UPSTREAM
Severity:	minor
Priority:	High
Version:	unspecified
Hardware:	AMD64
OS:	Linux
URL:	http://bugzilla.kernel.org/show_bug.cgi?id=469
Whiteboard:
Package list:		Runtime testing required:	---

Description André-Sebastian Liebe 2004-10-14 21:21:10 UTC

the network counter /proc/net resets itself after 4,294,967,269 Bytes (32Bit)

shouldn't it handle 64Bit (18,446,744,073,709,551,616 Bytes) Values?

Reproducible: Always
Steps to Reproduce:
1. use gentoo for amd64
2. produce traffic (more than 5GB)
3. check /proc/net

Actual Results:  
results between 0 and 4,294,967,269 Bytes

Expected Results:  
results between 0 and 18,446,744,073,709,551,616

Portage 2.0.50-r11 (default-amd64-2004.2, gcc-3.3.4, glibc-2.3.4.20040808-r1,
2.6.8-gentoo-r4)
=================================================================
System uname: 2.6.8-gentoo-r4 x86_64 4
Gentoo Base System version 1.5.3
Autoconf: sys-devel/autoconf-2.59-r5
Automake: sys-devel/automake-1.8.5-r1
ACCEPT_KEYWORDS="amd64"
AUTOCLEAN="yes"
CFLAGS="-pipe -O2"
CHOST="x86_64-pc-linux-gnu"
COMPILER=""
CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config
/usr/kde/3.2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config
/usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-pipe -O2"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs ccache"
GENTOO_MIRRORS="ftp://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/
ftp://mirrors.sec.informatik.tu-darmstadt.de/gentoo/
http://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ http://gentoo.zie.pg.gda.pl"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.digitized.lan/gentoo-portage"
USE="X Xaw3d aalib alsa amd64 apm arts avi berkdb bitmap-fonts cdr crypt
dedicated dvb encode esd f77 foomaticdb gdbm gif gnome gpm gtk gtk2 imlib ipv6
java jpeg kde leim libg++ libwww lzw-tiff mikmod motif mozdomi moznocompose
moznoirc mpeg mysql nas ncurses nls nogcj oggvorbis opengl oss pam pdflib perl
png python qt quicktime readline ruby sdl slang spell ssl tcpd tiff truetype xml
xml2 xprint xv zlib"

Comment 1 André-Sebastian Liebe 2005-02-07 12:39:24 UTC

I found out that there is also an entry for this on kernel.org's bugzilla wit patches

http://bugzilla.kernel.org/show_bug.cgi?id=469

Comment 2 Marcus D. Hanwell (RETIRED) gentoo-dev

2005-03-01 18:21:24 UTC

I think this is a decision the kernel guys would have to make.

Comment 3 Daniel Drake (RETIRED) gentoo-dev

2005-03-14 09:09:51 UTC

Upstream issue, we'll need to wait until the correct patch is merged into the official kernel.

Comment 4 Daniel Drake (RETIRED) gentoo-dev

2006-05-21 12:29:11 UTC

The upstream bug has been closed as it appears the current behavior is working and  it's not worth increasing the general size of this field.

If you can reproduce the 32bit wrapping problem on a recent kernel, please file a new bug.