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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-ia64-devel] BUG at mm.c:605
Hi Alex. I think the issue is same as reported in the below thread. http://lists.xensource.com/archives/html/xen-ia64-devel/2006-09/msg00204.html I tried to convince him, but failed. I think that the best way is to revert the patch and we should seek for the right fix. I guess that making xennet.rx_copy default enabled is the beginning. The root cause is that relinquish_memory() writes the P2M simulteniously with __acquire_grant_for_copy(). relinquish_memory() of IA64 assumes that no one else read the P2M table at the same time. However the such assumption is wrong now. Although I haven't dug into its details, I suspect that the race between relinquish_memory() and get_page() (or __acquire_grant_for_copy()) exists not only on ia64, but also on x86. thanks. On Tue, Oct 17, 2006 at 05:13:21PM -0600, Alex Williamson wrote: > > I seem to be hitting the BUG below with increasing regularity lately. > Typically it occurs right when a domU is in the middle of rebooting (it > appears to have shut down completely, I get a dom0 console prompt, then > the BUG below). It's random enough that I haven't been able to isolate > it to a particular changeset. Has anyone else seen this or (better yet) > have a fix? It's getting in the way of testing all the new patches > since I'm seeing this on xen-ia64-unstable.hg. Thanks, > > Alex > > -- > Alex Williamson HP Open Source & Linux Org. > > (XEN) BUG at mm.c:605 > (XEN) die_if_kernel: bug check 0 > (XEN) d 0xf000000007c88080 domid 0 > (XEN) vcpu 0xf000000007c60000 vcpu 0 > (XEN) > (XEN) CPU 0 > (XEN) psr : 0000101008226038 ifs : 8000000000000288 ip : [<f000000004048e50>] > (XEN) ip is at __bug+0x40/0x60 > (XEN) unat: 0000000000000000 pfs : 0000000000000288 rsc : 0000000000000003 > (XEN) rnat: 0000000000004000 bsps: 000000000000435b pr : 000000000059aa69 > (XEN) ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70033f > (XEN) csd : 0000000000000000 ssd : 0000000000000000 > (XEN) b0 : f000000004048e50 b6 : f000000004049e10 b7 : a00000010064afa0 > (XEN) f6 : 0fffbccccccccc8c00000 f7 : 0ffdbf300000000000000 > (XEN) f8 : 10001c000000000000000 f9 : 10002a000000000000000 > (XEN) f10 : 0fffe9999999996900000 f11 : 1003e0000000000000000 > (XEN) r1 : f000000004326f00 r2 : 000000000000435b r3 : f0000040fdad7781 > (XEN) r8 : 0000000000000000 r9 : 0000000000000000 r10 : 0000000000000000 > (XEN) r11 : 00000000005a0969 r12 : f000000007c67900 r13 : f000000007c60000 > (XEN) r14 : 0000000000004000 r15 : f00000000412ff2a r16 : 0000000000004001 > (XEN) r17 : f0000000041294fc r18 : 000000000000035b r19 : f0000000041294f8 > (XEN) r20 : f000000007c67860 r21 : f000000007c60010 r22 : 0000000000000080 > (XEN) r23 : 000000000002003c r24 : f000000007c67e20 r25 : f000000007c67e28 > (XEN) r26 : 0000000000000000 r27 : 0000000000000000 r28 : 0000000000000000 > (XEN) r29 : 0000000000000001 r30 : 0000000000000000 r31 : f000000004133db8 > (XEN) > (XEN) Call Trace: > (XEN) [<f0000000040a0330>] show_stack+0x80/0xa0 > (XEN) sp=f000000007c67520 bsp=f000000007c612c0 > (XEN) [<f00000000407abc0>] die_if_kernel+0x90/0xe0 > (XEN) sp=f000000007c676f0 bsp=f000000007c61290 > (XEN) [<f00000000406f330>] ia64_handle_break+0x220/0x2d0 > (XEN) sp=f000000007c676f0 bsp=f000000007c61258 > (XEN) [<f00000000409d220>] ia64_leave_kernel+0x0/0x310 > (XEN) sp=f000000007c67700 bsp=f000000007c61258 > (XEN) [<f000000004048e50>] __bug+0x40/0x60 > (XEN) sp=f000000007c67900 bsp=f000000007c61218 > (XEN) [<f000000004063f10>] lookup_noalloc_domain_pte+0x40/0x130 > (XEN) sp=f000000007c67900 bsp=f000000007c611e8 > (XEN) [<f000000004065d40>] lookup_domain_mpa+0x30/0x250 > (XEN) sp=f000000007c67900 bsp=f000000007c611b8 > (XEN) [<f0000000040664f0>] gmfn_to_mfn_foreign+0xc0/0xf0 > (XEN) sp=f000000007c67900 bsp=f000000007c61190 > (XEN) [<f000000004026910>] __acquire_grant_for_copy+0x3a0/0x490 > (XEN) sp=f000000007c67900 bsp=f000000007c61140 > (XEN) [<f000000004029870>] do_grant_table_op+0x1f80/0x2c20 > (XEN) sp=f000000007c67900 bsp=f000000007c61038 > (XEN) [<f00000000402f060>] do_multicall+0x2b0/0x390 > (XEN) sp=f000000007c67960 bsp=f000000007c60fa0 > (XEN) [<f00000000405ec40>] ia64_hypercall+0x990/0x1020 > (XEN) sp=f000000007c67960 bsp=f000000007c60f40 > (XEN) [<f00000000406f260>] ia64_handle_break+0x150/0x2d0 > (XEN) sp=f000000007c67df0 bsp=f000000007c60f08 > (XEN) [<f00000000409d220>] ia64_leave_kernel+0x0/0x310 > (XEN) sp=f000000007c67e00 bsp=f000000007c60f08 > (XEN) domain_crash_sync called from xenmisc.c:108 > (XEN) Domain 0 (vcpu#0) crashed on cpu#0: > (XEN) d 0xf000000007c88080 domid 0 > (XEN) vcpu 0xf000000007c60000 vcpu 0 > (XEN) > (XEN) CPU 0 > (XEN) psr : 0000101208026030 ifs : 800000000000040b ip : [<a00000010006d4d0>] > (XEN) ip is at ??? > (XEN) unat: 0000000000000000 pfs : 800000000000040b rsc : 000000000000000b > (XEN) rnat: 0000000000000000 bsps: e000000079609260 pr : 00000000005a5a65 > (XEN) ldrs: 0000000001680000 ccv : 0000000000000000 fpsr: 0009804c8a70433f > (XEN) csd : 0000000000000000 ssd : 0000000000000000 > (XEN) b0 : a00000010006d4a0 b6 : a0000001006aee00 b7 : a00000010064afa0 > (XEN) f6 : 1003e0000000000000000 f7 : 1003e000000000000023a > (XEN) f8 : 0fffe8e7fdc6000000000 f9 : 1003efffffffffffffc00 > (XEN) f10 : 000000000000000000000 f11 : 000000000000000000000 > (XEN) r1 : a00000010102cc90 r2 : 000000000000000d r3 : 8000000004fb7758 > (XEN) r8 : 0000000004fb7758 r9 : 0000000000000000 r10 : 0000000000000000 > (XEN) r11 : a000000100da9248 r12 : e00000007960fbd0 r13 : e000000079608000 > (XEN) r14 : 8000000004fb7758 r15 : 0000000000000001 r16 : a000000100da9200 > (XEN) r17 : 0000000000000001 r18 : e00000007960fc38 r19 : 00000000000007ff > (XEN) r20 : ffffffffffff0060 r21 : a000000100fb7758 r22 : 0000000000000080 > (XEN) r23 : e00000007960fc30 r24 : 0000005000000080 r25 : 0000000000000000 > (XEN) r26 : 0000000000000000 r27 : 00000000000003ed r28 : 00028000000403ed > (XEN) r29 : 0000000000000001 r30 : 0000000000000000 r31 : e00000007960fc28 > (XEN) > (XEN) Call Trace: > (XEN) [<f0000000040a0330>] show_stack+0x80/0xa0 > (XEN) sp=f000000007c67520 bsp=f000000007c61300 > (XEN) [<f00000000401f070>] __domain_crash+0xd0/0x110 > (XEN) sp=f000000007c676f0 bsp=f000000007c612d8 > (XEN) [<f00000000401f0d0>] __domain_crash_synchronous+0x20/0x50 > (XEN) sp=f000000007c676f0 bsp=f000000007c612c0 > (XEN) [<f00000000407ac00>] die_if_kernel+0xd0/0xe0 > (XEN) sp=f000000007c676f0 bsp=f000000007c61290 > (XEN) [<f00000000406f330>] ia64_handle_break+0x220/0x2d0 > (XEN) sp=f000000007c676f0 bsp=f000000007c61258 > (XEN) [<f00000000409d220>] ia64_leave_kernel+0x0/0x310 > (XEN) sp=f000000007c67700 bsp=f000000007c61258 > (XEN) [<f000000004048e50>] __bug+0x40/0x60 > (XEN) sp=f000000007c67900 bsp=f000000007c61218 > (XEN) [<f000000004063f10>] lookup_noalloc_domain_pte+0x40/0x130 > (XEN) sp=f000000007c67900 bsp=f000000007c611e8 > (XEN) [<f000000004065d40>] lookup_domain_mpa+0x30/0x250 > (XEN) sp=f000000007c67900 bsp=f000000007c611b8 > (XEN) [<f0000000040664f0>] gmfn_to_mfn_foreign+0xc0/0xf0 > (XEN) sp=f000000007c67900 bsp=f000000007c61190 > (XEN) [<f000000004026910>] __acquire_grant_for_copy+0x3a0/0x490 > (XEN) sp=f000000007c67900 bsp=f000000007c61140 > (XEN) [<f000000004029870>] do_grant_table_op+0x1f80/0x2c20 > (XEN) sp=f000000007c67900 bsp=f000000007c61038 > (XEN) [<f00000000402f060>] do_multicall+0x2b0/0x390 > (XEN) sp=f000000007c67960 bsp=f000000007c60fa0 > (XEN) [<f00000000405ec40>] ia64_hypercall+0x990/0x1020 > (XEN) sp=f000000007c67960 bsp=f000000007c60f40 > (XEN) [<f00000000406f260>] ia64_handle_break+0x150/0x2d0 > (XEN) sp=f000000007c67df0 bsp=f000000007c60f08 > (XEN) [<f00000000409d220>] ia64_leave_kernel+0x0/0x310 > (XEN) sp=f000000007c67e00 bsp=f000000007c60f08 > (XEN) > (XEN) Call Trace: > (XEN) [<f0000000040a0330>] show_stack+0x80/0xa0 > (XEN) sp=f000000007c67520 bsp=f000000007c61300 > (XEN) [<f00000000401f080>] __domain_crash+0xe0/0x110 > (XEN) sp=f000000007c676f0 bsp=f000000007c612d8 > (XEN) [<f00000000401f0d0>] __domain_crash_synchronous+0x20/0x50 > (XEN) sp=f000000007c676f0 bsp=f000000007c612c0 > (XEN) [<f00000000407ac00>] die_if_kernel+0xd0/0xe0 > (XEN) sp=f000000007c676f0 bsp=f000000007c61290 > (XEN) [<f00000000406f330>] ia64_handle_break+0x220/0x2d0 > (XEN) sp=f000000007c676f0 bsp=f000000007c61258 > (XEN) [<f00000000409d220>] ia64_leave_kernel+0x0/0x310 > (XEN) sp=f000000007c67700 bsp=f000000007c61258 > (XEN) [<f000000004048e50>] __bug+0x40/0x60 > (XEN) sp=f000000007c67900 bsp=f000000007c61218 > (XEN) [<f000000004063f10>] lookup_noalloc_domain_pte+0x40/0x130 > (XEN) sp=f000000007c67900 bsp=f000000007c611e8 > (XEN) [<f000000004065d40>] lookup_domain_mpa+0x30/0x250 > (XEN) sp=f000000007c67900 bsp=f000000007c611b8 > (XEN) [<f0000000040664f0>] gmfn_to_mfn_foreign+0xc0/0xf0 > (XEN) sp=f000000007c67900 bsp=f000000007c61190 > (XEN) [<f000000004026910>] __acquire_grant_for_copy+0x3a0/0x490 > (XEN) sp=f000000007c67900 bsp=f000000007c61140 > (XEN) [<f000000004029870>] do_grant_table_op+0x1f80/0x2c20 > (XEN) sp=f000000007c67900 bsp=f000000007c61038 > (XEN) [<f00000000402f060>] do_multicall+0x2b0/0x390 > (XEN) sp=f000000007c67960 bsp=f000000007c60fa0 > (XEN) [<f00000000405ec40>] ia64_hypercall+0x990/0x1020 > (XEN) sp=f000000007c67960 bsp=f000000007c60f40 > (XEN) [<f00000000406f260>] ia64_handle_break+0x150/0x2d0 > (XEN) sp=f000000007c67df0 bsp=f000000007c60f08 > (XEN) [<f00000000409d220>] ia64_leave_kernel+0x0/0x310 > (XEN) sp=f000000007c67e00 bsp=f000000007c60f08 > (XEN) Domain 0 crashed: rebooting machine in 5 seconds. > > > > _______________________________________________ > Xen-ia64-devel mailing list > Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-ia64-devel -- yamahata _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel
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