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 bootl
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
>
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?
thanks!
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_
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 it
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 t
On Wed, Feb 6, 2013 at 12:50 PM, 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 PCI-based
> controll
On Wed, Feb 06, 2013 at 01:16:22PM -0500, valdis.kletni...@vt.edu wrote:
> for high-density applications, there may be a upper limit on watts per second
> that you can cool, resulting in trade-offs being needed). Then there's cache
I'm sorry to ask, but don't you rather mean watts than watts per s
On Wed, Feb 6, 2013 at 3:53 AM, sandeep kumar wrote:
> 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 appro
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
seconds
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 relea
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 found
On Wed, Feb 6, 2013 at 1:21 PM, horseriver 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 binaries from hard dis
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, j
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
http://www.cs.amherst.edu/~sfkaplan/courses/2012/spring/cs261/assignments/pro
Hey Peter,
Think First link is useful for scheduler, thanks :).
Sent from my HTC
Excuse for typo.
- Reply message -
From: "Peter Teoh"
Date: Thu, Feb 7, 2013 9:38 am
Subject: Creating scheduler
To: "jeshkumar...@gmail.com"
Cc: "kernelnewbies"
well...u asked for it:
http://abstract.
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 o
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