[Asterisk-doc] docs installation.xml,1.8,1.9

[blitzrage]

Comments:
Update of /cvsroot/asterisk/docs
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv14654/docs

Modified Files:
	installation.xml 
Log Message:
blitzrage
- information about IRQ Sharing
Index: installation.xml
===================================================================
RCS file: /cvsroot/asterisk/docs/installation.xml,v
retrieving revision 1.8
retrieving revision 1.9
diff -C2 -d -r1.8 -r1.9
*** installation.xml	7 May 2004 01:52:40 -0000	1.8
--- installation.xml	7 May 2004 02:10:34 -0000	1.9
***************
*** 65,70 ****
  			<title>IRQ Sharing Issues</title>
  			<para>
! 			[Explain why sharing interrupts is a bad thing, considering
! 			the number of interrupts that the Digium hardware creates.]
  			</para>
  		</sect2>
--- 65,77 ----
  			<title>IRQ Sharing Issues</title>
  			<para>
! 			The X100P and etc.. tend to generate a large amount of interupts.  Servicing them
! 			takes time and drivers may not be able to do it on-time.  If another device is 
! 			processing the same shared IRQ, the IRQ line connot receive another one.  It does
! 			tend to work better on SMP (APIC) systems.  On single chip systems you can get 
! 			interupt misses and messed up clocking.  Any of Digium's cards or other telephony
! 			cards can be subject to this problem.  Because the precise delivery of IRQ's is
! 			very much necessary in telephony, one should not share IRQ's with anything.
! 			This is not to say you will necessarily have IRQ sharing conflicts, but it is 
! 			something to be aware of.
  			</para>
  		</sect2>