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[Xen-devel] mmap() on pvops will not return FAILED if the memory can't b
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] mmap() on pvops will not return FAILED if the memory can't be mapped or accessed. |
| From: | "Wang, Shane" <shane.wang@xxxxxxxxx> |
| Date: | Thu, 7 Jan 2010 16:27:36 +0800 |
| Accept-language: | en-US |
| Acceptlanguage: | en-US |
| Cc: | "Hao, Xudong" <xudong.hao@xxxxxxxxx> |
| Delivery-date: | Thu, 07 Jan 2010 00:29:23 -0800 |
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| Thread-topic: | mmap() on pvops will not return FAILED if the memory can't be mapped or accessed. |
Jeremy, I wrote an application calling mmap() on pvops and found it will not return FAILED if the mapped memory (say TXT heap) can't be mapped or accessed, unlike 2.6.18 domain 0 and the latest kernel. The serial port outputs (XEN) mm.c:776:d0 Non-privileged (0) attempt to map I/O space 000af520...000af5ff, which is the same as the output of 2.6.18 dom0. However, then it outputs many lines like (XEN) mm.c:838:d0 Error getting mfn ac247 (pfn a38aa) from L1 entry 80000000ac247425 for l1e_owner=0, pg_owner=32753.... This behaviour may cause dom0 hang finally. Is it correct? Can you help to have a look at it? Thanks. Shane _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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