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".


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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?