Need help on understanding hardware detection

[Tao Jiang (姜涛)]

Saqlain:
	Thanks for your guide.
	I'll do more search.

------------------				 
Tao Jiang (姜涛)
2013-08-20

-------------------------------------------------------------
发件人：Saqlain Abbas <saqlain.abbas.7 at gmail.com>
发送日期：2013-08-20 11:28
收件人：Tao Jiang (姜涛)
抄送：kernelnewbies
主题：Re: Re: Need help on understanding hardware detection

I believe "CPU through an interrupt" is correct, dude there is lot material
on Google on this topic, just try to search using terms "how kernel detect
a hardware" or "kernel plug and play" etc, try to use different queries and
you will find lot of stuff.

Cheers,



On Tue, Aug 20, 2013 at 6:46 AM, Tao Jiang (姜涛) <jiangtao.jit at gmail.com>wrote:

> Saqlain:
>     Thanks for your reply.
>     The article really opened my eyes.
>     But in that article wrote as
>     1.  " Linux kernel constantly scans all your computer bus’es  for any
> changes and new hardware. Once any change on any bus is detected magic
> begins "
>     And in the comments at the bottom,
>     2.  "a bus controller notifies the CPU through an interrupt which
> allows the kernel to query the controller back for information"
>     So my question is which one is right?
>     And can you show me more details on Linux kernel's implementation
> about "constantly scans" or "notifies the CPU through an interrupt"?
>
> ------------------
> Tao Jiang (姜涛)
> 2013-08-20
>
> -------------------------------------------------------------
> 发件人：Saqlain Abbas <saqlain.abbas.7 at gmail.com>
> 发送日期：2013-08-19 19:53
> 收件人：Tao Jiang (姜涛)
> 抄送：kernelnewbies
> 主题：Re: Need help on understanding hardware detection
>
> have a look at http://blogas.sysadmin.lt/?p=141 will give you a nice
> idea...
>
> Cheers,
> Saqlain.
>
>
> On Mon, Aug 19, 2013 at 4:47 PM, Tao Jiang (姜涛) <jiangtao.jit at gmail.com
> >wrote:
>
> > Hi All:
> >         I did some search on "how does linux kernel detect hardware?" and
> > got what udev is.
> >         I konw Linux kernel will send a netlink message to udevd.
> >         But I still do not understand how the kernel can decide to send a
> > netlink message.
> >         What happend before the netlink message?
> >         Take an usb stick for example, what will happen and what the
> > kernel do from the very beginning of it been plugged in?
> >         Thank you for advance. Any references will be appreciated.
> >
> > --------------
> > Tao Jiang (姜涛)
> > 2013-08-19
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
>
>
>
> --
> Kind Regards,
> Saqlain Abbas.
>
>
>



-- 
Kind Regards,
Saqlain Abbas.