Dear All
FYI:
I got the below data in my board...
For Zimage:
Copy from eMMC to RAM(bootloader) other stuff in bootloader -- 200msec
Kernel relocation --- 1msec
Kernel uncompression -- 700msec
Total time taken --- 900msec approx
For Image:
Copy from eMMC to RAM(bootloader) other stuff in
On Wed, Feb 06, 2013 at 02:35:47AM -0500, valdis.kletni...@vt.edu wrote:
On Wed, 06 Feb 2013 05:37:41 +0800, horseriver said:
After grub load kernel and initrd , it get around root filesystem
mounting ,
but failed with no finding root device ,from which kernel and initrd have
been
hi:)
I have a newbie question about hard ware.
At booting stage,kernel need to detect the hard device before mount it,
does this work need pci's surport?
At loading stage ,boot loader need to move binaries from hard disk partition
to ram,does this work need pci's surport?
Hi all :),
Can anyone suggest a good tutorial to create our own scheduler ?
Sent from my HTC
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On Wed, 06 Feb 2013 12:30:37 +0800, horseriver said:
root = ? You mean the aasignment at grub command line ?
For instance, the grub entry for the kernel I'm running right now:
title 3.8.0-rc6-next-20130206
kernel /vmlinuz-3.8.0-rc6-next-20130206 ro
root=/dev/mapper/vg_blackice
On Wed, 06 Feb 2013 13:21:17 +0800, horseriver said:
At booting stage,kernel need to detect the hard device before mount it,
does this work need pci's surport?
That depends. Is the controller for the hard drive a PCI-based controller? On
most x86-based boxes, it is (and I'm not sure
On Wed, 06 Feb 2013 23:19:26 +0530, jeshkumar...@gmail.com said:
Can anyone suggest a good tutorial to create our own scheduler ?
Doing an I/O scheduler is pretty trivial, and there's a number of
examples in-tree already to look at.
If you mean a CPU scheduler, the major reason why there's no
On Wed, Feb 6, 2013 at 12:50 PM, valdis.kletni...@vt.edu wrote:
On Wed, 06 Feb 2013 13:21:17 +0800, horseriver said:
At booting stage,kernel need to detect the hard device before mount
it,
does this work need pci's surport?
That depends. Is the controller for the hard drive a
On Wed, Feb 6, 2013 at 3:53 AM, sandeep kumar coolsandyfor...@gmail.comwrote:
Dear All
FYI:
I got the below data in my board...
For Zimage:
Copy from eMMC to RAM(bootloader) other stuff in bootloader -- 200msec
Kernel relocation --- 1msec
Kernel uncompression -- 700msec
Total time taken
On Wed, 06 Feb 2013 13:20:13 -0500, Greg Freemyer said:
Most new MB's have a SATA controller directly on the MB connected directly
to either the North or South bridge (I don't know which).
I don't think any PCI is support needed to talk to the boot disk.
Yes, but said SATA controller and
On Wed, 06 Feb 2013 20:40:47 +0100, Jonathan Neuschäfer said:
I'm sorry to ask, but don't you rather mean watts than watts per second?
There may indeed be a second order time component involved - for instance, a
cooling system that can handle 10 watts continuously, 20 watts for up to 30
unsuscribe
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correct me if i am wrong
i presume that page pertains to a physical page
when the page is allocated, _count would be 1. every process that wants to
obtain the page might solicit it from page cache first, if exsists, then
_count would increment by one.
every process would try to put_page as it
actually i dont see why there is a need to ptovide a lock by the kernel.
the locking should be at userspace.
you can test it by massive write to a file, that would demonstrat the
kernel
didnt confer a lock
sent from my samsung
Hello,
I was looking at how a syscall read/write was done, and i
On Wed, Feb 6, 2013 at 1:21 PM, horseriver horseriv...@gmail.com wrote:
hi:)
I have a newbie question about hard ware.
At booting stage,kernel need to detect the hard device before mount it,
does this work need pci's surport?
At loading stage ,boot loader need to move
in ANY updates/changes, locking is always needed, to prevent multiple
parties from updating at the same time. but there is another way:
lockless updates. one form done in linux kernel is called RCU:
http://en.wikipedia.org/wiki/Read-copy-update
the logic is whenever someone want to change,
well...u asked for it:
http://abstract.cs.washington.edu/~shwetak/classes/ee472/assignments/lab2/lab2.pdf
http://www.cs.cmu.edu/~410-s07/p3/kernel.pdf
http://web.stonehill.edu/compsci/CS314/Assignments/Assignment0.pdf
Hey Peter,
Think First link is useful for scheduler, thanks :).
Sent from my HTC
Excuse for typo.
- Reply message -
From: Peter Teoh htmldevelo...@gmail.com
Date: Thu, Feb 7, 2013 9:38 am
Subject: Creating scheduler
To: jeshkumar...@gmail.com jeshkumar...@gmail.com
Cc: kernelnewbies
Dear Abu
On our board we have a dedicated register to measure the ticks, right from
the POWER key press.
This register is incremented 32567 times every second.
We directly read the register with physical address(MMU is not turned on
bootloader, during uncompress_kernel MMU is on but still one on
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