From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Pfeuffer <thomas.pfeuffer@mytum.de>
Subject: Xen and tickless Linux
Date: Mon, 13 Oct 2008 13:52:55 +0200
Message-ID: <48F33697.1020102@mytum.de>
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Hello,

I am trying to build a custom kernel 2.6.24 from ubuntu with xen dom0 
support.

Does Xen support a tickless system (CONFIG_TICK_ONESHOT=y) and the 
realtime features of this kernel (CONFIG_PREEMPT=Y instead of 
CONFIG_PREEMP_VOLUNTARY)?

Everytime, I set these options while configuring the kernel, the two 
settings are not regarded during kernel compilation.

I also tried to build the kernel 2.6.27 from OpenSuse 11. The behaviour 
is similar. If I choose xen-compatible=y in menu entry "Subarchitecure 
Type", then the tickless system and CONFIG_PREEMPT options can't be set 
any more.

So I wonder if Xen supports these features.


Thanks in advance,

Thomas