kernel May 2012

kernel@lists.fedoraproject.org

19 participants
18 discussions

fedora 14 kernel performance with ip forwarding workload
by Jesse Brandeburg 05 Jun '15

05 Jun '15

The other day I was running the stock fedora kernel on my ip forwarding setup, to see what the performance was, and the performance wasn't very good. system is S5520HC dual socket 2.93GHz Xeon 5570 (Nehalem) with 3 quad port 82580 adapters (12 ports). Traffic is bidirectional 64 byte packets being forwarded and received on each port, basically port to port routing. I am only using 12 flows currently. The driver is igb, and I am using an affinity script that lines up each pair of ports that are forwarding traffic into optimal configurations for cache locality. I am also disabling remote_node_defrag_ratio to stop cross node traffic. With the fedora default kernel from F14 it appears that CONFIG_NETFILTER=y means that I cannot unload all of netfilter even if I stop iptables service. perf showed netfilter being prominent, and removing it gives me much higher throughput. Is there a reason CONFIG_NETFILTER=y ? Isn't it a good thing to be able to disable netfilter if you want to? Jesse

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[patch f17 00/11] team: refresh to latest net-next
by Jiri Pirko 20 Jun '12

20 Jun '12

Refresh team driver co so it can work correctly with recent libteam version. All patches are in net-next tree David S. Miller (1): team: Stop using NLA_PUT*(). Jiri Pirko (10): team: add binary option type team: add loadbalance mode team: add support for per-port options team: add bool option type team: add user_linkup and user_linkup_enabled per-port option team: ab: walk through port list non-rcu team: add missed "statics" team: lb: let userspace care about port macs team: allow to enable/disable ports team: add per-port option for enabling/disabling ports drivers/net/team/Kconfig | 11 + drivers/net/team/Makefile | 1 + drivers/net/team/team.c | 523 +++++++++++++++++++++++------ drivers/net/team/team_mode_activebackup.c | 20 +- drivers/net/team/team_mode_loadbalance.c | 174 ++++++++++ drivers/net/team/team_mode_roundrobin.c | 2 +- 6 files changed, 621 insertions(+), 110 deletions(-) create mode 100644 drivers/net/team/team_mode_loadbalance.c -- 1.7.6.5

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[PATCH 00/11] Wacom Intuos4 Wireless support
by Peter Hutterer 30 May '12

30 May '12

A set of patches cherry-picked from upstream to make the Intuos4 Bluetooth variant useful. Without these patches, some data is missing, so we miss out on relative mode, pad buttons, wheel support, etc. Cheers, Peter

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[PATCH] Use BIOS Keyboard variable to set Numlock
by Joshua C. 29 May '12

29 May '12

Can some, please, apply the following patch to the fedora kernel? http://marc.info/?l=linux-kernel&m=133072333922354&w=2 . It sets the NumLock state on the keyboard according to the data in the bios.

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Fedora Kernel Meeting Minutes 05-24-2012
by Josh Boyer 25 May '12

25 May '12

============================== #fedora-meeting: Fedora Kernel ============================== Meeting started by jwb at 18:00:29 UTC. The full logs are available at http://meetbot.fedoraproject.org/fedora-meeting/2012-05-25/fedora-kernel.20… . Meeting summary --------------- * Release overview (jwb, 18:01:02) * Release overview - F15 (jwb, 18:01:53) * F15 to stay on 3.3.y until EOL (jwb, 18:05:24) * bugs will be looked over and triaged one final time (jwb, 18:05:45) * Release overview - F16 (jwb, 18:05:50) * Release overview - F16/F17 (jwb, 18:07:33) * F16/F17 moving to 3.4 once 3.3.7 moves to stable updates (jwb, 18:07:52) * iwlwifi seems to have more issues. again. for like the 3rd kernel release (jwb, 18:09:23) * ACTION: jforbes to discuss 3.4 iwlwifi issues with linville before rebase (jwb, 18:10:45) * F17 Gold. Yay. 0-day kernel updates will be pending for all (jwb, 18:15:34) * 3.4 rebase (iwlwifi issues aside) should close a number of f17 bugs (jwb, 18:17:08) * Release overview - rawhide (jwb, 18:17:41) * rawhide rebased to 3.5 merge window (jwb, 18:20:21) * uprobes merged and enabled (jwb, 18:20:26) * Open Floor (jwb, 18:22:13) * kernel-test regression test framework on fedorahosted now (jwb, 18:23:05) * LINK: http://git.fedorahosted.org/git/?p=kernel-tests.git (jwb, 18:23:15) Meeting ended at 18:30:11 UTC. Action Items ------------ * jforbes to discuss 3.4 iwlwifi issues with linville before rebase Action Items, by person ----------------------- * jforbes * jforbes to discuss 3.4 iwlwifi issues with linville before rebase * **UNASSIGNED** * (none) People Present (lines said) --------------------------- * jwb (54) * davej (26) * jforbes (18) * nirik (8) * zodbot (3) * brunowolff (3) Generated by `MeetBot`_ 0.1.4 .. _`MeetBot`: http://wiki.debian.org/MeetBot

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CONFIG_NR_CPUS
by Xose Vazquez Perez 24 May '12

24 May '12

> * Tue Jan 17 2012 Dave Jones <davej(a)redhat.com> > - Rawhide builds now use MAXSMP on x86. > - For release builds, set x86-64 to support 64 CPUs. > If larger systems become widespread, we can increase in an update. _today_ amd: 4sockets * 16cores = 64 intel: 4sockets * 10cores * 2threads = 80

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3.5 merge started
by Josh Boyer 22 May '12

22 May '12

Mostly as FYI, I've started building the 3.5 merge window kernels today. The one building in Koji right now boots on my local x86_64 system without issue. I'm not sure if that trend will continue, but I plan on testing locally before I do koji builds. I've done the first round of Kconfig options settings. Secondary architectures, please review this and let me know if you want/need something set differently from how I have it. NOTE: The ARM configs are both confusing and too numerous, so I have not touched those. Also, the kernel-3.5.0-arm.config file seems to be dummy and winds up with a lot of options unset. The ARM team will need to do some config option settings, preferrably sooner rather than later. Perhaps as time goes on, I'll gain a better understanding of what to set where and how. josh

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What is the earliest x86 64bit CPU we support?
by Tom Callaway 21 May '12

21 May '12

So... what is it? I think the earliest is the AMD Opteron (2003). >From a "earliest in each family" perspective, I think the answer is: AMD: AMD Opteron (2003). Intel: Intel Xeon (Nocona) (2004) VIA: VIA Nano (2008) Excluding Itanium (thank god), are there any other early x86 64bit CPUs that I'm missing or any that we explicitly no longer support? ~tom == Fedora Project

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Re: CONFIG_NR_CPUS
by Xose Vazquez Perez 21 May '12

21 May '12

Ruben Kerkhof wrote: > It's even higher these days: > > grep NR_CPUS /boot/config-2.6.32-220.13.1.el6.x86_64 > CONFIG_NR_CPUS=4096 > > I'm curious, has anyone measured what the memory overhead is of > keeping NR_CPUS at 512? > arch/x86/Kconfig says "This is purely to save memory - each supported > CPU adds approximately eight kilobytes to the kernel image." If that's > true, 512 cpus use 4MB, something I'm willing to live with on my 64bit > servers. https://bugzilla.redhat.com/show_bug.cgi?id=219457

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mount --move
by Norman Gaywood 18 May '12

18 May '12

I'm pretty sure that in 3.3.2-6.fc16.x86_64 this sequence worked: mkdir -p /tmp/testing cd /tmp/testing/ mkdir -p foo bar mount -t tmpfs tmpfs foo/ mount --move foo bar/ With 3.3.5-2.fc16.x86_64 the last step gives: mount: wrong fs type, bad option, bad superblock on /tmp/testing/foo, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Didn't test any kernels between those two. Is this a bug or feature? Didn't see anything is syslog. -- Norman Gaywood, Computer Systems Officer University of New England, Armidale, NSW 2351, Australia ngaywood(a)une.edu.au Phone: +61 (0)2 6773 3337 http://mcs.une.edu.au/~norm Fax: +61 (0)2 6773 3312 Please avoid sending me Word or Power Point attachments. See http://www.gnu.org/philosophy/no-word-attachments.html

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kernel May 2012