Public bug reported:
sysctl can list this variable, but apparently not set it. strace output
is pretty useless:
open("/proc/version", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fe6d54f9000
read(3, "Linux version 3.2.0-24-generic ("..., 1024) = 143
close(3) = 0
munmap(0x7fe6d54f9000, 4096) = 0
open("/sys/devices/system/cpu/online", O_RDONLY|O_CLOEXEC) = 3
read(3, "0-3\n", 8192) = 4
close(3) = 0
open("/proc/sys/net/ipv4/tcp_allowed_congestion_control",
O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fe6d54f9000
write(3, "illinois westwood lp\n", 21) = -1 ENOENT (No such file or directory)
close(3) = 0
munmap(0x7fe6d54f9000, 4096) = 0
write(2, "error: \"No such file or director"..., 89error: "No such file or
directory" setting key "net.ipv4.tcp_allowed_congestion_control"
) = 89
exit_group(-1) = ?
Here's listing and failing to set:
host ~ [0]# sysctl net.ipv4.tcp_allowed_congestion_control
net.ipv4.tcp_allowed_congestion_control = illinois cubic reno
host ~ [0]# sysctl net.ipv4.tcp_allowed_congestion_control="illinois westwood
lp"
error: "No such file or directory" setting key
"net.ipv4.tcp_allowed_congestion_control"
host ~ [255]#
Is this possibly related to a bad AppArmor profile? I've never
encountered this on a non-Ubuntu system. On top of this, I can set
net.ipv4.tcp_congestion_control with no error, and sysctl shows the
change afterward.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: procps 1:3.2.8-11ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sun May 13 13:25:31 2012
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64
(20120424.1)
ProcEnviron:
TERM=linux
PATH=(custom, no user)
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: procps
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.sysctl.conf: 2012-05-13T13:22:37.626745
** Affects: procps (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise third-party-packages
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/998832
Title:
[procps] sysctl reports missing variable that isn't
(net.ipv4.tcp_allowed_congestion_control)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/998832/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
