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8088e584
2008 Nov 22
5
Infinte loop in RtlPrefetchMemoryNonTemporal under Windows
...t. The problem is that the machine locks hard.
After some tedious work with the debugger, I have found that Windows
makes a call to a routine called RtlPrefetchMemoryNonTemporal, which
looks like this:
8088e579 mov eax,dword ptr [nt!KePrefetchNTAGranularity 8088e57e
0f184100 prefetchnta [ecx]
8088e582 add ecx,eax
8088e584 sub edx,eax
8088e586 ja nt!RtlPrefetchMemoryNonTemporal+0x6 (8088e57e)
8088e588 ret
Unfortunately it appears that the value at nt!KePrefetchNTAGranularity
is 0, hence the infinite loop.
Is there anything in Xen that could cause Windows to put a zero in
there? The...