how platform device drivers are different
location: linuxquestions.com - date: July 13, 2011
I am new to linux.Recently I checked two device drivers for SPI (serial peripheral interface). One driver is using platform_driver_register function to register the driver and it is using spi base address.
The other driver is using spi_register_driver to register it and it is using the SPI bus number.
Why the difference between these two drivers. If it is based on the chip set, then how do I know, when to use the platform device driver and when to use the other.
Please help me.
how ping works in Linux
location: linuxquestions.com - date: June 27, 2006
I have few questions on working of ping.
My questions are as follow:
1. How ping calculates packet loss? or when it considers the loss of packet?
According to me if the reply packet is not get back within a particular time period it must be treated as a loss packet. But now the question is What is the default timeout period for reply packet in ping?
I know that ping sends request packet every 1 sec by default. But after sending request packet it must be starting timer to get back the reply.
I wanted to ask you what is the default timeout period to get back the reply?
Is it that, if the packet does not reach by that default timeout period but reaches after timeout period then also ping considers it as loss.
In man page of ping -W timeout option is given which allows you to change the timeout period for reply packet. It also says ping waits for 2 RTT. Is it that default timeout period for getting reply packet back is 2 RTT. But initially how does pi
How is device emulation done in kvm
location: linuxexchange.com - date: June 28, 2010
I know that the qemu-kvm does the device emulation stuff in KVM. Is the qemu-kvm being executed in the userspace of the host? So when a kick function is encountered, it exits the VM through a hypercall into the hypervisor, then the hypervisor hand over to
qemu-kvm in host userspace. Next after doing the needed
things, the qemu-kvm transits to the hypervisor and then the
hypervisor back to the VM. So it means there are two system calls one
from VM-->Hypervisor and qemu-kvm-->Hypervisor? Are these the steps
that take place or i am wrong? If there is any documentation about
these kind of stuff, please give me the link. Thank you very much...
How are device driver development and linux kernel programming related/different?
location: linuxexchange.com - date: August 6, 2014
This might be a stupid question but I am confused and google couldn't help.
I know Linux is the Kernel which is the heart of many distros( Ubuntu, Mint). But when we say "Linux kernel programming", what do we exactly mean? Is it Bash scripting?
And how it is related to the device driver development? (Do we mean that the hardware is running linux kernel and we do kernel programming to support peripherals, this is ,in general, device driver development in relation to linux? )
How ping know IP address of a given website?
location: linuxquestions.com - date: October 21, 2011
I'm pretty new to networking stuff.
Can some one help me in understanding how Ping translates given website address into corresponding IP address?
Where is this table stored and how it gets updated when new websites are created?
Thanks in advance,
How to ping a device using port number ?
location: linuxquestions.com - date: September 1, 2008
Is there any command/utility which would help me to ping a network device from solaris box by providing port number as the argument along with the ipaddress.
I tried the following :
/usr/sbin/ping -p <port> <ipaddress>
But this dint work.
I am using an application which would be doing provisioning of some services on a network device. This application works on Sun Solaris.
This application would access the network device using a user mentioned free port. Hence I need to know if the device is accessible on that particular port.
How to mount android tablet as a USB device
location: ubuntuforums.com - date: June 24, 2011
I have an Acer Iconia Tab A500 and the instruction manual said to use it as a USB drive I would just have to plug it in. Unfortunately, Ubuntu does not automatically do some steps that Windows/Mac apparently do, so, long story short, it did not show up in Nautilus and I did not know how to mount it manually. The process to do so was a bit convoluted, but I found it in the first post of this thread:
The only modification to those steps that I needed was to NOT enable "USB debugging" on the tablet. When "USB debugging" was enabled Ubuntu gave a "Transport endpoint not connected" error. The instructions in that link are for Acer Iconia and Motorola Xoom tablets but there is a good chance they are applicable to other Android tablets or phones. If you have to modify the instructions to get yours to work, please post them here so that other people with the same device as you will know what to modify as
"No space left on device" error on /tmp. How to increase space on /tmp?
location: linuxquestions.com - date: January 20, 2011
cp: writing `/tmp/tmpX2KZDc/system.image': No space left on device
However, when I right-click on properties, I see it has 51 items, totalling only 130.5 KB!
this is a dual boot system with Win XP and Ubuntu 10.10 (~58Gb partition)
Virtual machine in ubuntu, how to run win 7 of other device?
location: ubuntuforums.com - date: August 18, 2013
i'm decide use ubuntu as SO primary, but still needs some softwares in other SO/Windows. I known apps to use virtual machines in ubuntu, but i would want know if exist the possibility of run in ubuntu session a virtuality session of windows 7, it is already installed on a hd.
thanks in advanced
How do I find where device is mounted
location: ubuntuforums.com - date: June 26, 2008
I was curious as to how I could easily find where a device was mounted to..
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