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Questions tagged [linux-kernel]

The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.

The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.

The Linux kernel is released under the GNU General Public License version 2 (GPLv2) (plus some firmware images with various non-free licenses[citation needed]), and is developed by contributors worldwide. Day-to-day development discussions take place on the Linux kernel mailing list.

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Understand interface TX & RX counters for bridged mode interfaces

I have a Linux gateway running interfaces in transparent bridged mode. Here eth0=WAN, eth1=LAN. Ideally, I believe eth0 RX = eth1 TX bytes and same way eth1 RX = eth0 TX bytes. But it seems huge gap in those interfaces. How br0 interface counters…
Rajdip Patel
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Upgrading kernel on debian 8 Jessie

I have a Debian 8 Jessie server, and I'd like to upgrade my kernel to at least version 4, in order to use overlay fs with Docker. My current kernel is: $ uname -r 3.16.0-4-amd64 I followed a guide which stated to add the backports repository to the…
BackSlash
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Upgrade the os of a syslog-ng or rsyslog server

I run a RHEL server with rsyslog to collect my network logs, and by receiving a security bulletin alert I have to upgrade this server. What is the strategy to upgrade this machine, knowing that many other machine's logs depend on this and on an OS…
Ali Mezgani
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LINUX: multiq leaf not replaceable with tc

# uname -r 4.7.5-200.fc24.x86_64+debug # tc -s -d qdisc show dev ens3 qdisc mq 8001: root Sent 44589 bytes 340 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 qdisc fq_codel 0: parent 8001:1 limit 10240p flows 1024 quantum…
cherusk
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Centos 7 auditing pipe-user-pages-soft being exceeded

The following patch introduced behaviour where a user has the default buffer size of new pipes changed if the total amount of memory used by pipes exceeds a threshold. https://lkml.org/lkml/2016/1/18/171 Is there a way to use auditd to trigger on…
dom
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Why am I having issues upgrading the kernel on a fresh Ubuntu 16.04 installation?

I signed up for a Linux VPS. This VPS comes with an older Linux kernel, and I would like to upgrade it because some software I want to run requires a newer version. This is the output of uname -a: Linux florence 2.6.32-042stab120.11 #1 SMP Wed Nov…
Brian Tkatch
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soft lockup in user process and dead lock

I have one issue, at customer machine the user space process is hogging up the processor (soft lockup)along with 2 kernel process and dump stack trace showing RIP at _ticket_spin_lock in all 3 process. As i know "If an user-space process had caused…
Sumit Gemini
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hosted virtual server kernel update

I have a virtual server at strato.de and their support didn't answer my email in 12 hours, so I'm hoping I can get a solution here (even though it might be very specific). I did a kernel update with apt-get install linux-generic-lts-xenial. The…
xyious
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TCP Dup ACK linux kernel 3.2

I am downloading very slowly on some servers we host when using HTTPS on debian 8.1 kernel 3.16.0-4-amd64 Apache 2.4.10-10 The architecture is : CLIENT X.X.X.X => NAT ON FIREWALL: Y.Y.Y.Y => HTTP(S) WEB SERVER LAN IP:10.254.248.101 Test with HTTPS :…
Benoit974
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ZFS on Linux Server occasionally stalls and then resumes

Im having an issue which I have a really hard time debugging. Running ZFS, by system "hiccuped", dumped some information into DMESG, and continued working. My ZFS is hosting VMs on ESXi. When this issue occurs, many of the VMs experience block IO…
user1955162
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Logging In as a root user to a remote machine using SSH

My problem is similar to this one , I am trying to automate the portion where I can access the remote machine and run a command as super user. It works fine till it logs-in , like from here :- $ ssh-keygen -t rsa -b 2048 to $ ssh-copy-id…
Aseem Yadav
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system unresponsive after soft lockup

We observed frequent soft lockup issues on Ubuntu 12.04 (kernel: 3.8.0-29-generic) and found system unresponsive after that. Here are kern.log message just before soft locks occurred. Any help would be highly appreciated. Mar 29 00:12:01 HOST9016…
Compete2Cooperate
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memory usage reporting by kernel in log when task is killed due to OOM

My task inside Docker container are getting killed due to OOM. Here is a log from /var/log/messsages. Feb 17 19:01:24 ip-10-0-1-85 kernel: [16211.346602] uwsgi invoked oom-killer: gfp_mask=0xd0, order=0, oom_score_adj=0 Feb 17 19:01:24 ip-10-0-1-85…
Aldarund
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Strange messages in my syslog on Debian

I am getting strange messages on my /var/log/syslog that aren't usual. I am running a Debian Jessie LXC Container inside of a Debian Wheezy machine. But I believe this is not the problem. An example of them: Dec 10 16:30:59 gtbono kernel: 18Id …
gtbono
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How to increase the amount of memory used for caching on 32 bit Linux?

I have a server with 64 GiB RAM running 32 bit Debian GNU/Linux v7.9: # uname -a Linux srv1 3.2.0-4-686-pae #1 SMP Debian 3.2.68-1+deb7u5 i686 GNU/Linux # free -m total used free shared buffers cached Mem: …
Delian Krustev
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