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xen-devel
Re: [Xen-devel] Re: [Xen-users] xen on suse 9.3 and software raid
On 12 May 2005, at 15:28, Gerd Knorr wrote:
(which is called by raid6_before_mmx, which in turn is called by
raid6_mmx1_gen_syndrome, both calls not visible in the trace
because they are inlined).
Ideas how to fix that? Other than just disabling raid6? Can
that code be replaced with xen hypercalls? fsave & frestore
are also used btw. It's all in drivers/md/raid6x86.h
This is a known issue with Xen 2.0, already fixed in unstable (by
emulating the privileged instructions).
There are three options here:
1. Live with it. Disable raid6 in Xen 2.0 and wait for upgrade to
forthcoming Xen 3.0.
2. Backport some of the privileged-instruction emulation to Xen 2.0.
3. Patch the raid6x86.h for Xen 2.0 to do hypercalls rather than priv
instructions.
I think either options 1 or 2 would be best. Backporting the relevant
bits of the instruction decoder and emulator from the unstable
repository would not be very difficult, if this is a big show-stopper
for anyone.
-- Keir
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