Why does register_block release a bdev_inode instance at the end?

[Rock Lee]

Hi, all:
It has been known that all inodes that represent block devices are kept 
on the bdev pseudo-filesystem.And I thought that a bdev_inode instance is 
generated when the function of register_disk is called.But why does 
register_disk release a bdev_inode instance by calling blkdev_put at the end? 
BTW, my kernel is linux-2.6.32.


RegardsRock Lee___
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Re: Eudyptula challenge status

[Giedrius Statkevicius]

Hi Ramon,

On 2014.11.04 14:59, Ramon Fried wrote:
 Tasks are pending for a long time. Anyone has Info regarding the queue?
It happens from time to time because a lot of people are doing the
challenge. If after some time (1 - 2 weeks +) you get no reply you can
always send little a message and ask about the queue or if your
submission was lost. Just don't send him messages very short after
sending your submissions because that will piss him off. He's already
doing a tremendous favor for all of us.

Hopefully this will be helpful,
Giedrius

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Re: RT Kernel compile and install help needed.

[Valdis . Kletnieks]

On Tue, 04 Nov 2014 13:07:47 +0530, Chanchal Paul said:

 I am fairly new to kernel compilation and installation process, still i
 managed to learn from Kernelnewbies and RT-wiki and managed to patch
 3.12.14 vanilla kernel with rt patch 3.14.12.

You *really* want to get the correct patch on the kernel release. Mixing
and matching a 3.12 kernel and a 3.14 patch will almost certainly lead to
weird results.

 Now my confusion arises when i see my uname -a string as Linux
 paul-lubuntu 3.14.12-rt9 #2 SMP PREEMPT Tue Oct 28 13:30:27 UTC 2014 x86_64
 x86_64 x86_64 GNU/Linux which indicated that i have a preemptive kernel
 installed. but the c program from 
 https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO; for Runtime
 detection of an RT-PREEMPT Kernel only prints this is a vanilla kernel.
 So, my question is am I running a vanilla kernel or a real-time kernel? If
 I am not then what are the steps to properly install a real-time kernel?

After applying the patch, you need to run 'make menuconfig' or similar
and actually enable the hard realtime support.

Also, be aware that most of the -rt patch has over the years been upstreamed,
so for the vast majority of uses, applying the patch isn't really worth
it - 95% of the people using that patch don't get any measurable benefit.

(Yes, most of the people using it *claim* they get better latency response
from their desktop.  And most of them are having total placebo effect. They
think they should get better response, so they think they get it.  Nobody's
actually done a blind study, where grub randomly boots one kernel or another
and the user doesn't know which, and measured any difference that way)


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