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New IO-APIC ACK method seems to cause problems on some systems
authorkaf24@firebug.cl.cam.ac.uk <kaf24@firebug.cl.cam.ac.uk>
Fri, 14 Apr 2006 13:14:24 +0000 (14:14 +0100)
committerkaf24@firebug.cl.cam.ac.uk <kaf24@firebug.cl.cam.ac.uk>
Fri, 14 Apr 2006 13:14:24 +0000 (14:14 +0100)
commit6cd90d7bb2f91d24a4c75baddd98dd4c4bbbe638
treed60798f06e06e5fe2af16f5495ee55f58cc796fbtree | snapshot
parent52b9331de2fa446d659d61313f319990012d4742commit | diff
New IO-APIC ACK method seems to cause problems on some systems
(e.g., Dell 1850). Disable it by default for now, but allow the
new mwethod to be tested by passing boot parameter 'new_ack'
to Xen.

You can tell which ACK method you are using because Xen prints
out "Using old ACK method" or "Using new ACK method" during boot.

This workaround can be removed if/when the problems with the new
ACK method are flushed out.

Signed-off-by: Keir Fraser <keir@xensource.com>
xen/arch/x86/io_apic.c diff | blob | history
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