September 2015 - kernelnewbies@kernelnewbies.org

Re: Would like know when the tcp sequence no is rollover
by Ramana Reddy Sept. 20, 2015

Sept. 20, 2015

Hi Bjørn, Thanks for your reply. Actually, I want to do some small experiment, so would need this tcp sequence roll over code. If you know some thing in this regards, please let me know. Thanks & Regards, Ramana On Fri, Sep 18, 2015 at 7:17 PM, Ramana Reddy <gtvrreddy(a)gmail.com> wrote: > Hi, > Thanks for your reply. Actually, I want to restrict the TCP Sequence range > to a half range and rollover after > crosses that value. In anotherway, I want to use only half the TCP > sequence and once it crosses that value will rollover. > > Thanks, > Ramana > >

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Regirect /var/log/log/syslog messages to our own txt file
by Gunjan Mehta Sept. 19, 2015

Sept. 19, 2015

Hi, I am working on a project, where i print my log messages in /var/log/log/syslog like project_my:info::project started project_my:debug::value of a is 1 i want to redirect project_my:info messages in info.txt file and project_my:debug in debug.txt file. Regards Gunjan

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Wireless Driver issue (Atheros AR9485)
by David Scaperoth Sept. 18, 2015

Sept. 18, 2015

I'm attempting to run pm-suspend on my laptop (by shutting my lid and on command line), and its putting my AR9485 wifi card into a funk (i.e. wlan0 interface seen through ifconfig never returns upon resume). I know theres a lot to this (power management - pm-utils and kernel, wireless drivers, general linux drivers, and possibly other things), just need a little direction on which rabbit hole to start down...haha. Ive looked through the ath9k and wireless list archives and had no luck finding the same issue. I have tried different solutions (mostly related to pm-utils) from ubuntu's forums too. an example of where it failed /var/log/pm-powersave.log <snip> Running hook /usr/lib/pm-utils/power.d/wireless true: Turning powersave for wlan0 on...Error for wireless request "Set Power Management" (8B2C) : SET failed on device wlan0 ; Operation not supported. Failed. /usr/lib/pm-utils/power.d/wireless true: success. <snip> AND...according to https://wireless.wiki.kernel.org/en/users/documentation/dynamic-power-save I tried: iw dev wlan0 set power_save on command failed: Operation not supported (-95) This is my first post to this list, so I'm not sure what information would be useful to help find a solution (or workaround). Here goes nothing (perhaps I should attach text files next time for large diagnostic information?): I built an upstream kernel against gregkh staging tree with a Ubuntu distro just to see if this would fix my issue and it did not. Either way, here is some information: >> uname -a Linux xxx 4.2.0+ #1 SMP Sun Sep 6 05:53:34 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux >> lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty cat /proc/version Linux version 4.2.0+ (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) ) #1 SMP Sun Sep 6 05:53:34 EDT 2015 >>lspci -vvnn <snip> 01:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01) Subsystem: Hewlett-Packard Company AR9485/HB125 802.11bgn 1×1 Wi-Fi Adapter [103c:1838] <snip> I could provide more information from lspci and lshw but I'm not sure what would help (if at all). The strangest thing about the whole matter is that if I reboot, the card comes back online just fine. Thanks again for any help you can provide! David

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(no subject)
by Shraddha Barke Sept. 18, 2015

Sept. 18, 2015

By mistake I made some changes to staging-next branch Now I've reverted those changes but I'm getting this message when I checkout to staging-next Your branch is ahead of 'origin/staging-next' by 4 commits. (use "git push" to publish your local commits) How do I fix this? Thanks in advance

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Preceding a method call with (void)
by Kevin Wilson Sept. 18, 2015

Sept. 18, 2015

Hi all, I intend to send a patch to the kernel, and my question is about preceding a method with (void). In several OpenSource UserSpace projects, I encountered usage of preceding a method invocation with (void). For example: (void) myFunc(param1); I did not encounter such cases in the kernel code that I read, thus far. On the other hand, I did not saw in the kernel coding style doc anything which prohibits such usage. If I remember, using (void) before the method name is a way to tell explicitly that this method does not return any value, but I am not sure as for the exact reasons it is used (in userspace). My question is: Will sending a patch to the kernel with code with (void) preceding method calls make sense ? or should I avoid it in the first place (again, I did not saw such a pattern in the kernel) Regards, Kevin

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Re: [PATCH 2662/2662] Staging: android: Fix 80 character length
by punit vara Sept. 18, 2015

Sept. 18, 2015

I have created one patch and already submitted. Now I have created another patch for another directory . What should be the subject of patch [Patch 2/2] or just [patch ] ??? On Fri, Sep 18, 2015 at 3:00 PM, punit vara <punitvara(a)gmail.com> wrote: > Thank you sir I will do the same If I would find any patch > > On Fri, Sep 18, 2015 at 2:45 PM, Sudip Mukherjee > <sudipm.mukherjee(a)gmail.com> wrote: >> usually i will create the patch with git format-patch -1 to generate the >> last patch >> >> On Fri, Sep 18, 2015 at 2:42 PM, punit vara <punitvara(a)gmail.com> wrote: >>> >>> before changing the file I did git fetch and then git remote update >>> .At that time all patches came automatically with update .Then I >>> simply create patch with git format-patch master..my_local_branch >>> 2662-... >>> >>> That is why subject was like [2662/2662] . >>> >>> On Fri, Sep 18, 2015 at 2:37 PM, Sudip Mukherjee >>> <sudipm.mukherjee(a)gmail.com> wrote: >>> > I will also do git fetch but numbers will not show. what command you >>> > gave to >>> > generate the patch? >>> > >>> > On Fri, Sep 18, 2015 at 2:26 PM, punit vara <punitvara(a)gmail.com> wrote: >>> >> >>> >> Sorry sir about that ..I have done git fetch so another 2661 patches >>> >> fetched .that's why mistakenly it subject was like that.I again >>> >> changed patch as you guide and send.Thank you for feedback sir >>> >> >>> >> On Fri, Sep 18, 2015 at 1:52 PM, Sudip Mukherjee >>> >> <sudipm.mukherjee(a)gmail.com> wrote: >>> >> > On Fri, Sep 18, 2015 at 12:38:21PM +0530, Punit Vara wrote: >>> >> >> This patch is to the Kconfig file which fixes up lines which >>> >> >> exceeded the standard 80 character limitation. >>> >> >> This file also fixes up 3 warnings regarding paragraph. >>> >> >> >>> >> >> Signed-off-by: Punit Vara <punitvara(a)gmail.com> >>> >> >> --- >>> >> > Your subject says 2662/2662. Then where are your 2661 earlier patches >>> >> > of >>> >> > the series? >>> >> > No, that is wrong. The numbers we use when we submit a series of >>> >> > patches. But for a single patch (1/1) numbers are not required and >>> >> > 2662 >>> >> > is definitely wrong. >>> >> > >>> >> > regards >>> >> > sudip >>> >> >>> >> >>> >> >>> >> -- >>> >> Regards, >>> >> Punit Vara >>> >> 9033553488 >>> > >>> > >>> >>> >>> >>> -- >>> Regards, >>> Punit Vara >>> 9033553488 >> >> > > > > -- > Regards, > Punit Vara > 9033553488 -- Regards, Punit Vara 9033553488

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Would like know when the tcp sequence no is rollover
by Ramana Reddy Sept. 18, 2015

Sept. 18, 2015

Hi all, I would like to know, when the TCP sequence no is rollover. Who will do it. Is it happens in tcp code or through the hardware. If is it is in the tcp code, can some one please point the code in the linux kernel where it happens. Thanks & Regards, Ramana

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Hijack a weak syscall
by NISHANTHA Sept. 18, 2015

Sept. 18, 2015

Hi, I'm trying to implement kexec as a module. When I do "cat /proc/kallsyms | grep kexec" it gives a out output like this c01b3478 W compat_sys_kexec_load c01b3478 W sys_kexec_load my sys_call_table page is not write protected. So I did *syscall_table[__NR_kexec_load] = (void *)my_kexec; but when I run kexec, It still says "kexec_load function not implimented" When if dig more, The W above means it's a weak symbol. Can I hijack those or, will I have to find another way? Thank you -madushan

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Re: git sendmail configuration example for mail.reiseup
by Albino B Neto Sept. 17, 2015

Sept. 17, 2015

2015-09-17 8:46 GMT-03:00 Dario Maiocchi <sodar(a)riseup.net>: > Thank You Albino. It works for me now. So good. :-) Albino

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Re: git sendmail configuration example for mail.reiseup
by Albino B Neto Sept. 17, 2015

Sept. 17, 2015

2015-09-17 8:41 GMT-03:00 Silvan Jegen <me(a)sillymon.ch>: >>> my configuration of git is: >>> >>> [sendemail] >>> smtpEncryption = ssl >>> smtpServer = reiseup.net > > > reiseup.net (a domain which I cannot find) vs. Thank you. Error type. Albino

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