kernel December 2011

kernel@lists.fedoraproject.org

25 participants
19 discussions

fedora 14 kernel performance with ip forwarding workload
by Jesse Brandeburg 04 Jun '15

04 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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[PATCHSET] utrace for 3.1 kernel
by Oleg Nesterov 07 Feb '12

07 Feb '12

Hello. utrace patches for 3.1 kernel. Untested, will try to do some tests tomorrow. I do not want to spam you all and the lists, please look at git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc.git utrace-3.1 Oleg Nesterov (29): utrace: add utrace_init_task/utrace_free_task calls tracehooks: add utrace hooks tracehooks: reintroduce tracehook_consider_fatal_signal() add utrace hooks into sig_ignored() and recalc_sigpending() restore the EXEC/EXIT/CLONE utrace hooks utrace: utrace_report_death() can use task_utrace_struct() restore the DEATH/REAP utrace hooks utrace: remove jobctl bits ptrace: take ->siglock around s/TRACED/RUNNING/ introduce wake_up_quiescent() introduce ptrace_signal_wake_up() wait_task_inactive: treat task->state and match_state as bitmasks introduce TASK_UTRACED state utrace: use TASK_UTRACED instead of TASK_TRACED reintroduce tracehook_finish_jctl() as utrace_end_stop() teach wake_up_quiescent() to do "selective" wake_up ptrace_stop: do not assume the task is running after wake_up_quiescent() get_signal_to_deliver: restore/restructure utrace/ptrace signal reporting utrace_get_signal: s/JOBCTL_STOP_PENDING/JOBCTL_PENDING_MASK/ introduce ptrace_set_syscall_trace() introduce PT_SYSCALL_TRACE flag utrace: don't clear TIF_SYSCALL_TRACE if it is needed by ptrace introduce task_utrace_lock/task_utrace_unlock teach ptrace_set_syscall_trace() to play well with utrace introduce PT_SINGLE_STEP and PT_SINGLE_BLOCK utrace: finish_resume_report: don't do user_xxx_step() if ptrace_wants_step() ptrace: shift user_*_step() from ptrace_resume() to ptrace_stop() ptrace_disable: no need to disable stepping ptrace_report_syscall: check TIF_SYSCALL_EMU Roland McGrath (1): utrace core Documentation/DocBook/Makefile | 2 +- Documentation/DocBook/utrace.tmpl | 589 +++++++++ arch/s390/kernel/traps.c | 4 +- arch/x86/kernel/ptrace.c | 1 - fs/exec.c | 5 +- fs/proc/array.c | 14 +- include/linux/ptrace.h | 7 + include/linux/sched.h | 25 +- include/linux/signal.h | 2 + include/linux/tracehook.h | 53 +- include/linux/utrace.h | 773 ++++++++++++ init/Kconfig | 9 + kernel/Makefile | 1 + kernel/exit.c | 5 + kernel/fork.c | 9 + kernel/ptrace.c | 57 +- kernel/sched.c | 2 +- kernel/signal.c | 97 ++- kernel/utrace.c | 2461 +++++++++++++++++++++++++++++++++++++ 19 files changed, 4062 insertions(+), 54 deletions(-) create mode 100644 Documentation/DocBook/utrace.tmpl create mode 100644 include/linux/utrace.h create mode 100644 kernel/utrace.c

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[F15 PATCH 0/6] ARM: Add support for pata_imx (for Genesi Smarttop)
by Niels de Vos 28 Dec '11

28 Dec '11

Hi there! This patchset contains only cherry-picked patches from Linus' current tree. Without these patches, the Genesi Smarttop does not recognize the onboard SSD-chip. The required driver (pata_imx) is already included in the ARM verion of the kernel, only the bindings with the board are missing. Instead of sending all patches in separate emails, I'm attaching them numbered and all for easy inclusion in the F15 kernel. I have done local testing and can happily report that the 2.6.41.6-1 kernel can use the onboard SSD when appying these patches. I (and other Fedora ARM owners of a Smarttop) appreciate it if these patches can be included in a next release. Many thanks, Niels --- Arnaud Patard (4): imx51: add pata device imx51: add pata clock imx: efika: Enable pata. Fix pata imx resource Fabio Estevam (1): ARM: imx: Add PATA resources for other i.MX processors Uwe Kleine-König (1): ARM: mx5: fix remaining inconsistent names for irqs arch/arm/mach-mx5/Kconfig | 1 + arch/arm/mach-mx5/clock-mx51-mx53.c | 7 +- arch/arm/mach-mx5/devices-imx51.h | 4 + arch/arm/mach-mx5/devices.c | 10 +- arch/arm/mach-mx5/mm.c | 8 +- arch/arm/mach-mx5/mx51_efika.c | 2 + arch/arm/plat-mxc/devices/Kconfig | 3 + arch/arm/plat-mxc/devices/Makefile | 1 + arch/arm/plat-mxc/devices/platform-pata_imx.c | 59 ++++++++ arch/arm/plat-mxc/include/mach/devices-common.h | 8 + arch/arm/plat-mxc/include/mach/mx35.h | 2 +- arch/arm/plat-mxc/include/mach/mx51.h | 162 +++++++++++----------- 12 files changed, 175 insertions(+), 92 deletions(-) create mode 100644 arch/arm/plat-mxc/devices/platform-pata_imx.c

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Re: yum and kernel-modules-extra
by Josh Boyer 26 Dec '11

26 Dec '11

On Mon, Dec 26, 2011 at 12:32 PM, Thorsten Leemhuis <Thorsten_Leemhuis(a)gmx.de> wrote: > On 26.12.2011 18:01, Josh Boyer wrote: >> On Mon, Dec 26, 2011 at 11:11 AM, Bruno Wolff III <bruno(a)wolff.to> wrote: >>> I submitted an RFE (bug 770444) to include kernel-modules-extra in the >>> default list of install only packages for yum. >> The entire point of kernel-modules-extra is to get them out of the >> default install. If there are modules in that subpackage that are >> needed by default, then they should be moved back to the main package. [...] > > That's afaics not what Bruno proposes. What he afaics means is: when a > new kernel gets released, than the package kernel-modules-extra (just > like the kernel itself) needs to be installed (like a "rpm -i" would do) > and not updated (rpm -U), otherwise you loose the modules for current or > older kernels on "yum update" every time a new kernel gets released. Ah, indeed. My apologies Bruno, I misread "install only" as "install". Your RFE sounds good indeed. josh

1 0

yum and kernel-modules-extra
by Bruno Wolff III 26 Dec '11

26 Dec '11

I submitted an RFE (bug 770444) to include kernel-modules-extra in the default list of install only packages for yum.

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grubby fatal error: unable to find a suitable template
by Steve Dickson 21 Dec '11

21 Dec '11

Hello all, I'm getting the $SUBJECT error when I try to install a rawhide kernel on an updated f16 vm. # rpm -ihv kernel-3.2.0-0.rc6.git0.1.pnfsdlexp.fc16.x86_64.rpm Preparing... ########################################### [100%] 1:kernel ########################################### [100%] grubby fatal error: unable to find a suitable template # uname -r 3.1.5-6.fc16.x86_64 Things like the network and NFS do not come up due the fact the modules can not be found... so things are not being installed correctly.... Google searching the error I see a number bugzillas that are being blissfully ignored... Just curious if anybody else has seen this error and what they did about it... steved.

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iwlagn probs with 3.1.5
by Genes MailLists 19 Dec '11

19 Dec '11

Has anyone else noticed wifi problems (via iwlagn) on 3.1.5? After a wake from sleep today my lenovo laptop could not connect to wifi. It had connected fine on a different wifi. It got stuck in 'authenticating' phase - if the supplicant logs are a valid indicator. Booting back to 3.1.4 got it going again immediately. I did not see any out of the ordinary messages.t I know there been quite a bit of noise about iwlagn driver on LKML - but I thought most of the patches had gone into 3.1.5 ... gene

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Re: [kernel] This should never be =y
by Kyle McMartin 19 Dec '11

19 Dec '11

On Mon, Dec 19, 2011 at 09:48:06PM +0000, Dave Jones wrote: > commit f76e0239ae4715d34b39397046b51825fb3fa47c > Author: Dave Jones <davej(a)redhat.com> > Date: Mon Dec 19 16:47:56 2011 -0500 > > This should never be =y > Looks like nobody noticed when it changed from a bool to a tristate in 2006... ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 31) config DEV_APPLETALK 9cac2c35 (David S. Miller 2006-07-30 20:20:54 -0700 32) tristate "Appletalk interfaces support" ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 33) depends on ATALK ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 34) help ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 35) AppleTalk is the protocol that Apple computers can use to communicate ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 36) on a network. If your Linux box is connected to such a network, and wish ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 37) to do IP over it, or you have a LocalTalk card and wish to use it to ^1da177e (Linus Torvalds 2005-04-16 15:20:36 -0700 38) connect to the AppleTalk network, say Y. This isn't the first time this has happened... --Kyle

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RE: Route Metric
by Alexander Bahoor 19 Dec '11

19 Dec '11

Sorry for the broadcast, but don't see a group with networking and wireless. Can someone please recommend a list of wireless client adapters that support fedora or linux in general? I checked a few vendor, but did not see download for them. Rgrds, Alex

1 0

Disable Intel IOMMU by default in kernel-3.1.5-7
by Joshua C. 19 Dec '11

19 Dec '11

I saw in the change log for the kernel-3.1.5-7 that the Intel IOMMU has been disabled by default. Can someone explain this decision or point me to the right discussion on the internet? --joshua

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kernel December 2011