April 2014 - kernelnewbies@kernelnewbies.org - Kernelnewbies Mailing Lists

USB device not mounting
by HABI S RAVI April 9, 2014

April 9, 2014

Hi, I compiled Linux kernel from the source tree and booted from it. I used the config from my distribution. After booting, I can mount only those USB devices that i have mounted with the distribution kernel. I cannot mount new USB devices.

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2.6.10 no boot
by Marcello Stanisci April 8, 2014

April 8, 2014

Dear All, I built a linux kernel 2.6.10. When grub tries to execute it the system shows the message: Uncompressing Linux.. and then reboots in a very Spartan way. My suspects are that a modern bootloader tries to boot an older (although respectful) kernel. In facts grub does some preliminar, and mysterious to me, work prior to launch the kernel. In the following links you will find my .config and an excerpt of my grub.cfg. As an additional information, the same happens on two machines of mine (both having a debian wheezy), so the problem should not be related to hardware. .config --> http://www.polarhome.com:753/~marcello/.config grub.cfg --> http://www.polarhome.com:753/~marcello/grub.cfg In just one word: HELP Thanks in Advance.

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Re: 2.6.10 no boot
by Marcello Stanisci April 8, 2014

April 8, 2014

Hey Peter, I did the same booting my real machine with that version of Ubuntu Live and everything went fine, so it is definitely not an hardware issue. ps: you wrote just to me, not to the list. Cheers 2014-04-08 14:41 GMT+02:00 Peter Senna Tschudin <peter.senna(a)gmail.com>: > Hey Marcello, > > It runs inside virtual machines. I have successfully boot 2.6.10 from > Ubuntu 5.04 inside KVM using virtual machine manager as frontend. > > Peter > > On Tue, Apr 8, 2014 at 1:51 PM, Marcello Stanisci <stanisci.m(a)gmail.com> wrote: >> 2014-04-08 0:08 GMT+02:00 Andre Ferraz <deferraz(a)terra.com.br>: >>> There it is an 4th edition of LDD that will be released this year >>> >>> http://shop.oreilly.com/product/0636920030867.do >>> >>> Maybe oreilly will release the digital version sooner >> >> yes, I guess I'll wait August. >> >> Anyway, I even built the 2.6.10 kernel with the version of tools >> suggested in Documentation/Changes, that are gcc 2.95 and binutils >> 2.12.. >> with no luck :(( >> >> thanks guys >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies(a)kernelnewbies.org >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > > -- > Peter

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Measuring Network Packet processing time
by Sunny April 8, 2014

April 8, 2014

Hi all, I’m running xen 4.2 on Linux Kernel 3.7 and I’m trying to figure out the time taken(latency) by a network packet to reach it’s destination VM from the time it arrives at the NIC. What do you think is the best way to do it? I was thinking may be add rdtsc timestamp to the IP options header on arrival, and one more when it reaches to its desired VM and examine the two timestamps. I’ve not figured out a way to do this yet—but do you think this is a viable option or what other methods would you recommend? Thanks, Sunny

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Re: 2.6.10 no boot
by Marcello Stanisci April 8, 2014

April 8, 2014

it kicked out some warnings concerning casts but I don't think they are alarming. So, for the ones interested, in link [1] you'll find updated versions of snull driver, up to 2.6.31. [1] http://www.cs.fsu.edu/~baker/devices/lxr/http/source/ldd-examples/snull/snu… cheers 2014-04-08 13:56 GMT+02:00 Corey Sheldon <sheldon.corey(a)gmail.com>: > are you sure the compilation isn't kicking errors that seems real odd even > for such an ancient kernel .....may i recommend checking on the CentOS > forums as that still totes the 2.6.x kernels

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Re: 2.6.10 no boot
by Greg KH April 6, 2014

April 6, 2014

On Sun, Apr 06, 2014 at 10:59:04AM +0200, Marcello Stanisci wrote: > > 2.6.10 is _very_ old, it proabably doesn't even work on modern hardware. > > Why are you trying to use such an old kernel release? > > to study the examples that are in your book ;-) I mean LDD3. > I tried to build the snull driver with 2.6.39 but it doesn't compile, > so I decided to work > on the same version of the kernel as the book does. 2.6.39 is also really old, don't use it. If you search around, there are updated versions of the examples online, that work with the latest kernel releases, so I'd recommend using that. good luck, greg k-h

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Re: 2.6.10 no boot
by Marcello Stanisci April 6, 2014

April 6, 2014

> But I forgot to mention another thing: > > I patched it with a patch for 2.6.11 to make it compile with binutils > 2.22 (otherwise the assembler > would complain), and, although the compilation silently ends, it > probably messed up something. > I will look for the same patch for 2.6.10, or to downgrade my binutils. For those interested, the patch is that one: http://www.kernel.org/pub/linux/devel/binutils/linux-2.6-seg-5.patch

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process page map
by gary kong April 5, 2014

April 5, 2014

I am looking at the /proc/self/maps file. i find that for every shared library there are 4 sections with different permission. what are the reasons for this ? does that mean the same library is loaded 4 times ? e.g. 7fb543e5d000-7fb54401a000 r-xp 00000000 08:01 6033115 /lib/x86_64-linux-gnu/libc-2.17.so 7fb54401a000-7fb54421a000 ---p 001bd000 08:01 6033115 /lib/x86_64-linux-gnu/libc-2.17.so 7fb54421a000-7fb54421e000 r--p 001bd000 08:01 6033115 /lib/x86_64-linux-gnu/libc-2.17.so 7fb54421e000-7fb544220000 rw-p 001c1000 08:01 6033115 /lib/x86_64-linux-gnu/libc-2.17.so 7fb544220000-7fb544225000 rw-p 00000000 00:00 0 7fb544225000-7fb54423a000 r-xp 00000000 08:01 6029447 /lib/x86_64-linux-gnu/libgcc_s.so.1 7fb54423a000-7fb544439000 ---p 00015000 08:01 6029447 /lib/x86_64-linux-gnu/libgcc_s.so.1 7fb544439000-7fb54443a000 r--p 00014000 08:01 6029447 /lib/x86_64-linux-gnu/libgcc_s.so.1 7fb54443a000-7fb54443b000 rw-p 00015000 08:01 6029447 /lib/x86_64-linux-gnu/libgcc_s.so.1 7fb54443b000-7fb54453e000 r-xp 00000000 08:01 6032973 /lib/x86_64-linux-gnu/libm-2.17.so 7fb54453e000-7fb54473d000 ---p 00103000 08:01 6032973 /lib/x86_64-linux-gnu/libm-2.17.so 7fb54473d000-7fb54473e000 r--p 00102000 08:01 6032973 /lib/x86_64-linux-gnu/libm-2.17.so 7fb54473e000-7fb54473f000 rw-p 00103000 08:01 6032973 /lib/x86_64-linux-gnu/libm-2.17.so Gary

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uboot build for udoo board.
by Anand Moon April 5, 2014

April 5, 2014

Hi All, I am new to the boot loader part. Can some body help me compile the u-boot loader for udoo board. http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/ tags rel_imx_3.10.17_1.0.0_beta Please share your thoughts on this. -Anand Moon

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Re: 2.6.10 no boot
by Marcello Stanisci April 5, 2014

April 5, 2014

I already have a kernel that runs without initrd. Anyway, the use of initrd doesn't depend on your distro. Additional information: passing option "earlyprintk" to the kernel does not show anything. The system just reboots after showing "Uncompressing Linux.." 2014-04-05 17:22 GMT+02:00 Corey Sheldon <sheldon.corey(a)gmail.com>: > even for debian > > Corey W Sheldon > Owner, 1st Class Mobile Shine > 310.909.7672 > www.facebook.com/1stclassmobileshine > > > On Sat, Apr 5, 2014 at 11:21 AM, Corey Sheldon <sheldon.corey(a)gmail.com> > wrote: >> >> per this page as well it indicates a initrd line >> http://www.dedoimedo.com/computers/grub-2.html#mozTocId542243 >> >> Corey W Sheldon >> Owner, 1st Class Mobile Shine >> 310.909.7672 >> www.facebook.com/1stclassmobileshine >> >> >> On Sat, Apr 5, 2014 at 11:14 AM, Marcello Stanisci <stanisci.m(a)gmail.com> >> wrote: >>> >>> I have a kernel line, see "menuentry" in my grub.cfg. >>> I don't have a initrd entry, but it should not be required >>> >>> 2014-04-05 16:53 GMT+02:00 Corey Sheldon <sheldon.corey(a)gmail.com>: >>> > missing the kernel line brother see below: (edit for your setup as >>> > needed.. >>> > >>> > linux /vmlinuz-3.14.0-1.vanilla.mainline.knurd.1.fc20.i686 >>> > root=/dev/mapper/luks-35c3bcf7-802e-4aba-b62f-cf17b01d54cb ro >>> > rd.luks.uuid={snipped} >>> > >>> > initrd /initramfs-3.14.0-1.vanilla.mainline.knurd.1.fc20.i686.img >>> > } >>> > >>> > Corey W Sheldon >>> > Owner, 1st Class Mobile Shine >>> > 310.909.7672 >>> > www.facebook.com/1stclassmobileshine >>> > >>> > >>> > On Sat, Apr 5, 2014 at 7:05 AM, Marcello Stanisci >>> > <stanisci.m(a)gmail.com> >>> > wrote: >>> >> >>> >> Dear All, >>> >> >>> >> I built a linux kernel 2.6.10. When grub tries to execute it the >>> >> system shows the message: >>> >> >>> >> Uncompressing Linux.. >>> >> >>> >> and then reboots in a very Spartan way. >>> >> >>> >> My suspects are that a modern bootloader tries to boot an older >>> >> (although respectful) kernel. In facts grub does some >>> >> preliminar, and mysterious to me, work prior to launch the kernel. >>> >> >>> >> In the following links you will find my .config and an excerpt of my >>> >> grub.cfg. As an additional information, the same happens on two >>> >> machines of mine (both having a debian wheezy), so the problem should >>> >> not be related to hardware. >>> >> >>> >> .config --> http://www.polarhome.com:753/~marcello/.config >>> >> grub.cfg --> http://www.polarhome.com:753/~marcello/grub.cfg >>> >> >>> >> In just one word: HELP >>> >> >>> >> Thanks in Advance. >>> >> >>> >> _______________________________________________ >>> >> Kernelnewbies mailing list >>> >> Kernelnewbies(a)kernelnewbies.org >>> >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >>> > >>> > >>> >>> _______________________________________________ >>> Kernelnewbies mailing list >>> Kernelnewbies(a)kernelnewbies.org >>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> >

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