RE: regarding hotpluggable devices adn linux kernel

RE: regarding hotpluggable devices adn linux kernel

[Bhupesh Kumar Pandey, Noida]

"Hotplug of FC-HBA on PCI Express bus and PnP of SCSI disk".


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks and Best Regards
Bhupesh Kumar Pandey


-----Original Message-----
From: Greg KH [mailto:greg@kroah.com] 
Sent: Monday, January 10, 2005 12:35 PM
To: Bhupesh Kumar Pandey, Noida
Cc: linux-kernel@vger.kernel.org
Subject: Re: regarding hotpluggable devices adn linux kernel

On Mon, Jan 10, 2005 at 12:19:21PM +0530, Bhupesh Kumar Pandey, Noida wrote:
>  
> Actually I want to know the how hotplugging works under 2.6 and what 
> is the information flow and how a user can do this.

Hotplug what?  That's a _very_ general term.  Hotplug CPU?  Hotplug Memory?
Hotplug SCSI disk?  Hotplug USB device?  Hotplug keyboard?
Hotplug PCI device?  Hotplug IEEE1394 device?  Hotplug PCMCIA device?
The userspace /sbin/hotplug script?  The linux-hotplug script package?
and so on...

They all work differently, as they are all different things.

> Secondly is it support PnP of iSCSI disks? If yes then it has support 
> in kernel or any patch is nedded? If no then what are the problems.

I do not know anything about iSCSI, sorry.  Try asking on the linux-scsi
mailing list.

greg k-h

Re: regarding hotpluggable devices adn linux kernel

[Greg KH]

On Mon, Jan 10, 2005 at 12:39:56PM +0530, Bhupesh Kumar Pandey, Noida wrote:
> "Hotplug of FC-HBA on PCI Express bus

This would involve the pci hotplug driver.  On 2.6, look in
/sys/bus/pci/slots for the different pci slots (after you have loaded
the proper pci hotplug driver for your hardware.)  To add or remove a
card, simply echo 0 or 1 in the power file in the slot that you wish to
turn on or off.  I recommend using the pcihpview program if you don't
like using echo, as it is a gui driven program to do the same thing.

The FC-HBA portion is the same if it's hotplugged or not, no difference
there.

> and PnP of SCSI disk".

It should just be added, if the whole FC-HBA comes up.  If you mean
adding another one later on, after the controller card has scanned the
bus, I don't know, ask the scsi people.

Hope this helps.

greg k-h

file system crashed when using samba?

[muzi li]

Hi guys:
      I have two boxes, one is gentoo, the othe is win2k. The gentoo
use gentoo kernel 2.6.10-r2.The file systems crashed last nigth, and
my gentoo box can't power on then.The step below:
      1. I mount the win2k share disk to my gentoo box.
      2. I copy 100MB file from my win2k to my gentoo box, then the
win2k box power off.
      3. I check the gentoo box log , found some smb sync errors,
      4. Then my gentoo box doesn't work, I can't exeute  any bin file
and can't change to any directory, I guess the file systems
crashed.Then I reset the box for pressing the reset button, but the
system stopped at "Mounting proc system at /proc" in /sbin/rc.

Now how can I do? Is this a kernel bug or samba bug?

RE: regarding hotpluggable devices adn linux kernel

[Bhupesh Kumar Pandey, Noida]

Thanks a lot.
Now I should try my own. 


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks and Best Regards
Bhupesh Kumar Pandey


-----Original Message-----
From: Greg KH [mailto:greg@kroah.com] 
Sent: Monday, January 10, 2005 12:50 PM
To: Bhupesh Kumar Pandey, Noida
Cc: linux-kernel@vger.kernel.org
Subject: Re: regarding hotpluggable devices adn linux kernel

On Mon, Jan 10, 2005 at 12:39:56PM +0530, Bhupesh Kumar Pandey, Noida wrote:
> "Hotplug of FC-HBA on PCI Express bus

This would involve the pci hotplug driver.  On 2.6, look in
/sys/bus/pci/slots for the different pci slots (after you have loaded the
proper pci hotplug driver for your hardware.)  To add or remove a card,
simply echo 0 or 1 in the power file in the slot that you wish to turn on or
off.  I recommend using the pcihpview program if you don't like using echo,
as it is a gui driven program to do the same thing.

The FC-HBA portion is the same if it's hotplugged or not, no difference
there.

> and PnP of SCSI disk".

It should just be added, if the whole FC-HBA comes up.  If you mean adding
another one later on, after the controller card has scanned the bus, I don't
know, ask the scsi people.

Hope this helps.

greg k-h

Re: regarding hotpluggable devices adn linux kernel

[Greg KH]

On Mon, Jan 10, 2005 at 12:19:21PM +0530, Bhupesh Kumar Pandey, Noida wrote:
>  
> Actually I want to know the how hotplugging works under 2.6 and what is the
> information flow and how a user can do this.

Hotplug what?  That's a _very_ general term.  Hotplug CPU?  Hotplug
Memory?  Hotplug SCSI disk?  Hotplug USB device?  Hotplug keyboard?
Hotplug PCI device?  Hotplug IEEE1394 device?  Hotplug PCMCIA device?
The userspace /sbin/hotplug script?  The linux-hotplug script package?
and so on...

They all work differently, as they are all different things.

> Secondly is it support PnP of iSCSI disks? If yes then it has support in
> kernel or any patch is nedded? If no then what are the problems.

I do not know anything about iSCSI, sorry.  Try asking on the linux-scsi
mailing list.

greg k-h

RE: regarding hotpluggable devices adn linux kernel

[Bhupesh Kumar Pandey, Noida]

 
Actually I want to know the how hotplugging works under 2.6 and what is the
information flow and how a user can do this.
Secondly is it support PnP of iSCSI disks? If yes then it has support in
kernel or any patch is nedded? If no then what are the problems.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks and Best Regards
Bhupesh Kumar Pandey


-----Original Message-----
From: Greg KH [mailto:greg@kroah.com] 
Sent: Monday, January 10, 2005 12:09 PM
To: Bhupesh Kumar Pandey, Noida
Cc: linux-kernel@vger.kernel.org
Subject: Re: regarding hotpluggable devices adn linux kernel

On Mon, Jan 10, 2005 at 11:06:45AM +0530, Bhupesh Kumar Pandey, Noida wrote:
> Hello,
> Recently I came across a good document "Hotpluggable devices and the 
> linux kernel" by you (Greg Kroah-Hartman).
> This document is based on linux kernel 2.4 series. Is there any same 
> document which descibe the working of kernel 2.6 series.

It works the same, only better :)

Specifically what are you curious about?  Have you read the
linux-hotplug.sf.net documentation?

thanks,

greg k-h

Re: regarding hotpluggable devices adn linux kernel

[Greg KH]

On Mon, Jan 10, 2005 at 11:06:45AM +0530, Bhupesh Kumar Pandey, Noida wrote:
> Hello,
> Recently I came across a good document "Hotpluggable devices and the linux
> kernel" by you (Greg Kroah-Hartman).
> This document is based on linux kernel 2.4 series. Is there any same
> document which descibe the working of kernel 2.6 series.

It works the same, only better :)

Specifically what are you curious about?  Have you read the
linux-hotplug.sf.net documentation?

thanks,

greg k-h

regarding hotpluggable devices adn linux kernel

[Bhupesh Kumar Pandey, Noida]

Hello,
Recently I came across a good document "Hotpluggable devices and the linux
kernel" by you (Greg Kroah-Hartman).
This document is based on linux kernel 2.4 series. Is there any same
document which descibe the working of kernel 2.6 series.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thanks and Regards 
Bhupesh Kumar Pandey