On 02/13/2007 03:29 PM, Jeremy Fitzhardinge wrote:
Dan Hecht wrote:
I assume you plan to eventually get all this stuff working but just
want to prevent configurations that the Xen paravirt-ops isn't ready
for at the moment?
Instead can you do it this way:
config XEN
depends on PARAVIRT && !PREEMPT && HZ_100 && !DOUBLEFAULT && !KEXEC
That's a bit simpler code-wise, but it does make it pretty complex to
get everything just-so to even see the CONFIG_XEN option.
Not only is it simpler code-wise, but it is more to the point... it is
CONFIG_XEN that needs to be fixed to handle PREEMPT, KEXEC, different HZ
values, etc. Not the other way around.
Enabling the compile of any paravirt-ops backend shouldn't cripple the
kernel in any way... instead, the burden should be on the xen
paravirt-ops backend to be completed. CONFIG_PREEMPT shouldn't care
about which paravirt-ops are compiled in. Instead, CONFIG_XEN is the
one that needs !PREEMPT.
Dan
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