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Bug 120537 - /proc/diskstats wrong data in kernel 2.6.15-r1
Summary: /proc/diskstats wrong data in kernel 2.6.15-r1
Status: RESOLVED NEEDINFO
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Unspecified (show other bugs)
Hardware: All Other
: High normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-01-27 07:57 UTC by barthek
Modified: 2006-03-06 15:29 UTC (History)
0 users

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Runtime testing required: ---

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Description barthek 2006-01-27 07:57:21 UTC 
hi,
i have upgraded to kernel 2.6.15-r1 ( from 2.6.14-r5) and noticed
that iostat of sysstat shows wrong data (rkb/s, wkb/s were empty).
strangely, not all disk statistics are being updated.

# cat /sys/block/cciss\!c0d0/stat
  235211   920821        0  3815970   995079  2154094        0 50600310        0  1399050 54416140

similar data is shown through use of /proc/diskstats

notice the 3rd column of 0.

i have no idea whether its cciss driver issue, kernel issue or udev issue ?

unfortunately i have no other drives attached to the two servers this has started to happen, so i can not compare with any other device.

my emerge info:
Portage 2.0.54 (default-linux/x86/2005.1, gcc-3.4.4, glibc-2.3.5-r2, 2.6.15-gentoo-r1 i686)
=================================================================
System uname: 2.6.15-gentoo-r1 i686 Intel(R) XEON(TM) MP CPU 1.90GHz
Gentoo Base System version 1.6.14
distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled]
dev-lang/python:     2.4.2
sys-apps/sandbox:    1.2.12
sys-devel/autoconf:  2.13, 2.59-r6
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1
sys-devel/binutils:  2.16.1
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=pentium4 -O3 -pipe -funroll-loops -fstack-protector"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -mcpu=i686 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig collision-protect distlocks sandbox sfperms strict"
GENTOO_MIRRORS="http://src.gentoo.pl http://ftp.uni-erlangen.de/pub/mirrors/gentoo http://trumpetti.atm.tut.fi/gentoo http://www.fhh.opensource-mirror.de/gentoo.org"
MAKEOPTS="-j9"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://1g.compfort.com.pl/gentoo-portage"
USE="x86 X alsa apm berkdb bitmap-fonts bzip2 chroot clearpasswd crypt eds emboss expat gdbm gpm gstreamer gtk gtk2 hpn jpeg minimal mmx mp3 ncurses nptl nptlonly ogg openntpd pam pam_timestamp perl png python readline samba sftplogging sse ssl symlink tcpd truetype-fonts type1-fonts udev vorbis xinetd zlib userland_GNU kernel_linux elibc_glibc"
Unset:  ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
Comment 1 Daniel Drake (RETIRED) gentoo-dev 2006-02-17 08:42:10 UTC 
Can you reproduce this on the latest development kernel? Currently 2.6.16-rc3.
Comment 2 Daniel Drake (RETIRED) gentoo-dev 2006-03-06 15:29:49 UTC 
Please reopen when you have tested the latest development kernel.