[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Question about hvm disk io behavior
Hi, I am currently doing some study about hvm IO behavior. I encounter a strange thing that hvm tries to access a page owned to dom0 when it executes disk io instructions like "rep ins/outs".
Here is my console output message: (XEN) [M]emulate.c:384 ===Warning!! dst_ma=0x1ed0fa400, domain_id=0 rip=0xffffffff812a38fb size=0x200. (XEN) insns: f3 66 6d 5b. pite=0x80000000
domain id = 0 means it's a page of dom0 but rip is in the address space of domU, its instructions are f3 66 6d 5b. I am confusing why hvm need to put its disk data into dom0 memory space, is it a shared page? what do they share with this page?
Thanks for any reply. 陈进 复旦大学并行处理研究所
上海浦东新区张衡路825号,软件楼320 Jin Chen Phone: +86-21-51355360
Room 320, Software Building
No. 825, Zhangheng Road Pudong District, Shanghai 陈进 电话:+86-21-51355360 复旦大学并行处理研究所 上海浦东新区张衡路825号,软件楼320
Jin Chen Phone: +86-21-51355360 Room 320, Software Building
No. 825, Zhangheng Road Pudong District, Shanghai _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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