[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] xenpaging crashes xen in is_iomem_page()
Is xenpaging supposed to work? For me its crashing on a 4x3.6GHz Xeon, 4G system running SLES11 SP1. There is one guest running. A simple minded test of xenpaging crashes the host with xen 4.0 and xen-unstable the same way: # xenpaging 1 1 xc: error: Error flushing ioemu cache: Internal error (XEN) mm.c:768:d0 mfn 431f page ffff82f6000863e0 ci 0180000000000000/0000000000000000 32 (XEN) mm.c:769:d0 ffff82f6000863e0: 0000000000000000 0180000000000000 0000000000000000 0000000000000000 (XEN) Assertion '(page->count_info & ((1UL<<(64 - (9)))-1)) != 0' failed at mm.c:772 (XEN) Debugging connection not set up. (XEN) ----[ Xen-4.1.21836-20100726.111138 x86_64 debug=y Not tainted ]---- (XEN) CPU: 3 (XEN) RIP: e008:[<ffff82c480161d92>] is_iomem_page+0x11e/0x16c (XEN) RFLAGS: 0000000000010246 CONTEXT: hypervisor (XEN) rax: 007fffffffffffff rbx: ffffffffffffffff rcx: 00000000c8c7d8ae (XEN) rdx: 00000000000000d5 rsi: 000000000036cb58 rdi: 00000000000003e8 (XEN) rbp: ffff83012fecfbd8 rsp: ffff83012fecfb98 r8: 0000000000000003 (XEN) r9: 0000000000000004 r10: 0000000000000004 r11: 0000000000000001 (XEN) r12: 0000000000000000 r13: 0180000000000000 r14: 0000000000000000 (XEN) r15: ffff82f6000863e0 cr0: 0000000080050033 cr4: 00000000000006f0 (XEN) cr3: 0000000127c2e000 cr2: 00007f2aeea5d270 (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e010 cs: e008 (XEN) Xen stack trace from rsp=ffff83012fecfb98: (XEN) 0180000000000000 0000000000000000 0000000000000000 ffff8301192c0000 (XEN) 000000000000431f ffff8301192c0000 000000000000431f 000000000060c000 (XEN) ffff83012fecfc18 ffff82c4801ca912 0000000000000000 0000000100000000 (XEN) ffff8301192c0000 000000000060c000 ffff8800cd749e58 0000000000000000 (XEN) ffff83012fecfc28 ffff82c4801cee3d ffff83012fecfc78 ffff82c4801ceddd (XEN) 000000000010e540 7400000000000002 ffff82f6021ca810 fffffffffffffff3 (XEN) 000000000060c000 ffff8800cd749e58 0000000000000000 000000000060c000 (XEN) ffff83012fecfda8 ffff82c48014fc53 ffff83012fecff18 4c00000000000002 (XEN) ffff82f6024f85d0 000000002ffe4c60 4000000000000000 ffff82f602510fa0 (XEN) 000000000012887d 0000000000000067 ffff83012fea0000 ffff83012fea0000 (XEN) 000000000010e540 ffff83012fecfe38 ffff83012fecfcf8 ffff82c480167c59 (XEN) ffff83012fecfd88 ffff82c480167e96 ffff83012fecfd48 000000000012887d (XEN) 0000000000000000 0000000000000000 ffff83012fecfd58 0000000000249b00 (XEN) 00000000001288a0 00000000124d8125 ffff8301288a02e8 0000000000000000 (XEN) 0000000000000000 0000000000000001 00000000124d8125 ffff83012fea0000 (XEN) 0000000000000202 fffffffffffffff3 000000000060c000 ffff8800cd749e58 (XEN) 0000000000000000 00007fffe5f712b0 ffff83012fecfef8 ffff82c480103568 (XEN) ffff83012fea0000 0000000000000000 ffff83012fecfe08 ffff82c480163b65 (XEN) 0000000100000082 ffff82f602511400 ffff83012fea0000 ffff83012fea0000 (XEN) 0000000000000000 ffff82f602511400 ffff83012fecfee8 ffff82c48016e8d5 (XEN) Xen call trace: (XEN) [<ffff82c480161d92>] is_iomem_page+0x11e/0x16c (XEN) [<ffff82c4801ca912>] p2m_mem_paging_nominate+0xc3/0x252 (XEN) [<ffff82c4801cee3d>] mem_paging_domctl+0x2d/0x70 (XEN) [<ffff82c4801ceddd>] mem_event_domctl+0x36f/0x3a2 (XEN) [<ffff82c48014fc53>] arch_do_domctl+0x2573/0x2740 (XEN) [<ffff82c480103568>] do_domctl+0x1222/0x12aa (XEN) [<ffff82c4801fd392>] syscall_enter+0xf2/0x14c (XEN) (XEN) (XEN) **************************************** (XEN) Panic on CPU 3: (XEN) Assertion '(page->count_info & ((1UL<<(64 - (9)))-1)) != 0' failed at mm.c:772 (XEN) **************************************** (XEN) (XEN) Reboot in five seconds... (XEN) Debugging connection not set up. --- xen/arch/x86/mm.c | 7 +++++++ 1 file changed, 7 insertions(+) --- xen-unstable.hg-4.1.21836.orig/xen/arch/x86/mm.c +++ xen-unstable.hg-4.1.21836/xen/arch/x86/mm.c @@ -99,6 +99,7 @@ #include <xen/event.h> #include <xen/iocap.h> #include <xen/guest_access.h> +#include <xen/delay.h> #include <asm/paging.h> #include <asm/shadow.h> #include <asm/page.h> @@ -762,6 +763,12 @@ int is_iomem_page(unsigned long mfn) /* Caller must know that it is an iomem page, or a reference is held. */ page = mfn_to_page(mfn); + if ((page->count_info & PGC_count_mask) == 0) { + unsigned long **p = (unsigned long **)page; + MEM_LOG("mfn %lx page %p ci %p/%p %d", mfn, page, (void *)page->count_info, (void *)(page->count_info & PGC_count_mask), (int)sizeof(*page)); + MEM_LOG("%p: %p %p %p %p",page,p[0],p[1],p[2],p[3]); + mdelay(1234); + } ASSERT((page->count_info & PGC_count_mask) != 0); return (page_get_owner(page) == dom_io); _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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