[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] Re: Xen crash during boot with debug=y
Kay, Allen M wrote: > There is a known debug=y problem caused by cs# 19602. We will be > submitting a patch shortly for it. > > Are you using a NHM system? Allen, George has solved the his issue. It's not related to cs # 19602. Pls search his mail in mailing list. cs# 19602 with debug=y causes the spinlock panic only when you enable VT-d with interrupt remapping, because it calls xmalloc with interrupt disabled. I will fix it soon. Regards, Weidong > > Allen > > -----Original Message----- > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx > [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of George > Dunlap Sent: Tuesday, June 02, 2009 10:20 AM > To: xen-devel@xxxxxxxxxxxxxxxxxxx > Subject: [Xen-devel] Re: Xen crash during boot with debug=y > > Hm, I added some code to the check_lock() to print whenever it was > initializing, and found that the lock in pci.c was initialized to > zero. > > So I added some code to double-check the lock, modifying the layout of > pci.c slightly, and the problem went away. > > Which likely means that there's a buffer overflow somewhere clobbering > the spinlock debug value. Fun, fun, fun... > > -George > > On Tue, Jun 2, 2009 at 4:09 PM, George Dunlap > <George.Dunlap@xxxxxxxxxxxxx> wrote: >> I'm getting the following panic in Xen with tip when building with >> debug=y. It seems to be something with the spinlock/irq >> sanity-checking code; but it doesn't make any sense, because the lock >> in question is defined statically in xen/arch/x86/pci.c, and only >> used >> two places in that file, with irqsave/irqrestore both times. Any >> ideas? >> >> -George >> >> (XEN) Freed 140kB init memory. >> (XEN) Xen BUG at spinlock.c:24 >> (XEN) ----[ Xen-3.5-unstable x86_64 debug=y Tainted: C ]---- >> (XEN) CPU: 0 (XEN) RIP: e008:[<ffff828c8011b7b7>] >> check_lock+0x3d/0x49 (XEN) RFLAGS: 0000000000010046 CONTEXT: >> hypervisor (XEN) rax: 0000000000000000 rbx: ffff828c8020fa68 >> rcx: 0000000000000001 (XEN) rdx: 0000000000000000 rsi: >> 0000000000000001 rdi: ffff828c8020fa6c (XEN) rbp: ffff828c8028fd38 >> rsp: ffff828c8028fd38 r8: 0000000000000000 (XEN) r9: >> ffff828c8028fee4 r10: 0000000000cfbb00 r11: 000000000000ffff >> (XEN) r12: 0000000000000286 r13: 0000000000000004 r14: >> 0000000000000000 (XEN) r15: 0000000000000000 cr0: 000000008005003b >> cr4: 00000000000026f0 (XEN) cr3: 000000012ffae000 cr2: >> 00000000c1013fe8 (XEN) ds: e021 es: e021 fs: 0000 gs: 0000 >> ss: 0000 cs: e008 (XEN) Xen stack trace from rsp=ffff828c8028fd38: >> (XEN) ffff828c8028fd58 ffff828c8011ba2f 0000000000000004 >> 0000000080000008 (XEN) 0000000000000000 ffff828c80161187 >> 0000000000000004 ffff828c8028fdb8 (XEN) 0000000000000cfc >> ffff828c80167ba2 ffff8300cf2fa000 0000000000000000 (XEN) >> 0000000000000cfc ffff828c8028fe88 ffff828c8028ff28 0000000000000000 >> (XEN) ffff828c8028ff18 ffff828c8016b11c ffff83010000f800 >> ffff8300cf2fa000 (XEN) ffff828c8028fe78 ffff828c8015e527 >> ffff828c8028fe28 0000000000000282 (XEN) 0000000000000282 >> 0000000000000286 000000008028fe58 ffff83012ffc6308 (XEN) >> ffff83012feb9a80 0000000000000006 00000000ff750000 ffff8300cf2fa000 >> (XEN) ffff828c8028fe78 ffff828c80162f66 000000000000e021 >> ffff828402000020 (XEN) ffff83012feb9a80 0000000000000006 >> 00000004025fd720 0000000400000004 (XEN) 00000000c0603d87 >> ffff828c8015ebf6 828c801db970b948 c390ed90d1ffffff (XEN) >> 00000000ff750000 000000008011d687 000000012feb9067 ffff83012ffcc0e0 >> (XEN) ffff828c8028ffed 00000000ffffffff 0000000000000000 >> ffff8300cf2fa000 (XEN) 0000000000000000 00c0bb0000000000 >> 0000000000000000 ffff8300cf2fa000 (XEN) 0000000000000000 >> 0000000000000000 0000000000000000 0000000000000000 (XEN) >> 00007d737fd700b7 ffff828c801db6db 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 0000000000000000 00000000c05f3f34 >> 0000000000000cfc (XEN) 0000000000000000 0000000000000000 >> 0000000000000000 0000000000000000 (XEN) 0000000000000000 >> 0000000000000000 0000000000000cfc 0000000000000000 (XEN) >> 0000000000000000 0000000d00000000 00000000c0603d86 000000000000e019 >> (XEN) Xen call trace: (XEN) [<ffff828c8011b7b7>] >> check_lock+0x3d/0x49 (XEN) [<ffff828c8011ba2f>] >> _spin_lock_irqsave+0x21/0x53 (XEN) [<ffff828c80161187>] >> pci_conf_read+0x37/0xd0 (XEN) (XEN) (XEN) >> **************************************** (XEN) Panic on CPU 0: (XEN) >> Xen BUG at spinlock.c:24 (XEN) >> **************************************** (XEN) (XEN) Reboot in five >> seconds... >> > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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