Re: Changing location of disk/filesystem cache

2013-10-10 Thread Mandeep Sandhu
On Thu, Oct 10, 2013 at 6:00 PM, Greg Freemyer wrote: > > > Mandeep Sandhu wrote: > >On Thu, Oct 10, 2013 at 5:00 PM, Ulka Vaze wrote: > > > >> Hi, > >> disk cache is same as filesystem cache. Also called buffer cache. > >> This is implemneted below fs layer. > >> It is basically a cache of dis

Re: Changing location of disk/filesystem cache

2013-10-10 Thread Greg Freemyer
Mandeep Sandhu wrote: >On Thu, Oct 10, 2013 at 5:00 PM, Ulka Vaze wrote: > >> Hi, >> disk cache is same as filesystem cache. Also called buffer cache. >> This is implemneted below fs layer. >> It is basically a cache of disk blocks mainatined in RAM. (In pages) >> called buffers. >> > >Ok. So

What to do with branches after submitting patches?

2013-10-10 Thread Matthias Beyer
Hi, I just got into kernel development and currently doing some patching of the usb divers for coding style adaptions and so on. My current workflow is: - get latest torvalds master - merge local master with fast forward to torvalds/master - create new branch, say "usb-core-foobar-cleanup" - pat

RE: system call does not work

2013-10-10 Thread binoy.jayan
Hi Ulka, You need to add edit two more files. Add the following in file "arch/x86/include/generated/uapi/asm/unistd_32.h": #define __NR_helloworld 349 Add the following in "include/linux/syscalls.h" : asmlinkage long sys_helloworld(void); Regards, Binoy Jayan Mob: +91-9742870916, +91-974

Re: Changing location of disk/filesystem cache

2013-10-10 Thread Mandeep Sandhu
On Thu, Oct 10, 2013 at 5:00 PM, Ulka Vaze wrote: > Hi, > disk cache is same as filesystem cache. Also called buffer cache. > This is implemneted below fs layer. > It is basically a cache of disk blocks mainatined in RAM. (In pages) > called buffers. > Ok. So this won't contain "files" but rat

system call does not work

2013-10-10 Thread Ulka Vaze
Hi All, I have Implemented sample system call on tree 3.4.6 Following are the steps i did - - >I created directory hello in kernel sources base directory i.e /usr/src/kernels/linux3.4.6/hello -> I have created hello.c file in which i added system call definition #include asmlinkage long sys_hell

Best ARM Quad Board for Linux kernel development.

2013-10-10 Thread Code Freak
Which is the best ARM Quad board ( e.g., ARM Cortex-A15 MPCore) available in the market for linux kernel development. Board must have hardware virtualization support. -- Codefreak ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://li

Changing location of disk/filesystem cache

2013-10-10 Thread Mandeep Sandhu
Hi All, I have a newbie question on disk/filesystem caches, so please bear with me! :) * Is disk cache the same as filesystem cache? Or there's nothing like a filesysten cache and all disk I/O, irrespective of what FS is being accessed, is cached in a "disk cache"? * Is this caching done at the