[Xen-bugs] [Bug 978] New: compiling with debug=y together with nosmp breaks domain creation

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=978

           Summary: compiling with debug=y together with nosmp breaks domain
                    creation
           Product: Xen
           Version: unstable
          Platform: PPC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P4
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: ehrhardt@xxxxxxxxxxxxxxxxxx
                CC: hollisb@xxxxxxxxxx


Bug in current tip when compiled debug=y and running with 1 cpu only - issuing
any simple xm create command that works elsewise runs into a BUG assert in
sched_credit.

Source levels:
xen-unstable.hg  - changeset:   15009:3a5722420de7
linux-ppc-2.6.hg - changeset:   33315:04f6ad5d9232

Scenario - with smp, normal xen (no debug) - working
Scenario - nosmp, maxcpu=1(DomU), maxcpu=1(Xen) - working
Scenario - nosmp, maxcpu=1(DomU), maxcpu=1(Xen),syncconsole - working
Scenario - debug=y, with smp - working
Scenario - debug=y, nosmp, maxcpu=1(DomU), maxcpu=1(Xen),syncconsole - bug

bug scenario matrix:
compile/cmdline  |  nosmp&maxcpu=1  |  multi cpu  |
    debug=y      |      BUG         |    works    |
-----------------|------------------|-------------|
    no debug     |     works        |    works    |

(XEN) Xen BUG at sched_credit.c:373
(XEN) ----[ Xen-3.0-unstable     ]----
(XEN) CPU: 00000000   DOMID: 00000000
(XEN) pc c00000000003c3c0 msr 8000000000009032
(XEN) lr c00000000004663c ctr c0000000000466e4
(XEN) srr0 ffffffffffffffff srr1 ffffffffffffffff
(XEN) dar 0000000000000000 dsisr 00000000 *** saved
(XEN) dar 00000000100ae414 dsisr 00200000 *** actual
(XEN) r00: 0000000084244488 c00000001218b4c0 c00000000072a398 ffffffffffff0024
(XEN) r04: 800000001218b640 000000000000000f 0000000000000005 0000000000000009
(XEN) r08: f4b775c00fef239c c0000000000466e4 0000000000000024 c00000000004656c
(XEN) r12: 0000000080244424 c0000000005e3100 0000000000000000 00000000ffffffff
(XEN) r16: 00000000101051ac 00000000f7df7930 00000000f7dd9c90 0000000000000000
(XEN) r20: 0000000000000000 00000000101052cc 000000001013def8 000000001013e054
(XEN) r24: 00000000f4b7760c 800000001218b640 00000000f4b77508 c00000001218b640
(XEN) r28: 0000000000000000 fffffffffffffff2 c0000000005f2330 c00000001218b780
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Xen BUG at sched_credit.c:373
(XEN) ****************************************
(XEN)
(XEN) Manual reset required ('noreboot' specified)
(XEN) ----[ Xen-3.0-unstable     ]----
(XEN) CPU: 00000000   DOMID: 00000000
(XEN) pc c00000000003c3c0 msr 8000000000009032
(XEN) lr c00000000004663c ctr c0000000000466e4
(XEN) srr0 ffffffffffffffff srr1 ffffffffffffffff
(XEN) dar 0000000000000000 dsisr 00000000 *** saved
(XEN) dar 00000000100ae414 dsisr 00200000 *** actual
(XEN) r00: 0000000084244488 c00000001218b4c0 c00000000072a398 ffffffffffff0024
(XEN) r04: 800000001218b640 000000000000000f 0000000000000005 0000000000000009
(XEN) r08: f4b775c00fef239c c0000000000466e4 0000000000000024 c00000000004656c
(XEN) r12: 0000000080244424 c0000000005e3100 0000000000000000 00000000ffffffff
(XEN) r16: 00000000101051ac 00000000f7df7930 00000000f7dd9c90 0000000000000000
(XEN) r20: 0000000000000000 00000000101052cc 000000001013def8 000000001013e054
(XEN) r24: 00000000f4b7760c 800000001218b640 00000000f4b77508 c00000001218b640
(XEN) r28: 0000000000000000 fffffffffffffff2 c0000000005f2330 c00000001218b780
(XEN) [0000000010FFB480] 000000000043C2A0 .debugger_trap_immediate+0x18/0x28
(XEN) [0000000010FFB500] 000000000043C204 .panic+0xe0/0x164
(XEN) [0000000010FFB5A0] 000000000043C378 .__bug+0x5c/0x6c
(XEN) [0000000010FFB620] 000000000041DFBC .csched_pcpu_init+0x1ac/0x20c
(XEN) [0000000010FFB6D0] 000000000041F770 .csched_vcpu_init+0x184/0x1d4
(XEN) [0000000010FFB780] 0000000000427914 .sched_init_vcpu+0x250/0x290
(XEN) [0000000010FFB830] 0000000000404938 .alloc_vcpu+0x14c/0x244
(XEN) [0000000010FFB8D0] 00000000004033A8 .do_domctl+0x7c8/0x1298
(XEN) [0000000010FFBBF0] 00000000004476E0 .hcall_xen+0xbc/0xec
(XEN) [0000000010FFBC80] 0000000000447808 .do_hcall+0x54/0x84
(XEN) [0000000010FFBD10] 000000000045C4FC ex_hcall_continued+0xf0/0x100
(XEN) [0000000000445E50] 80010001FBE1FFF8
(XEN) SP (600000004bffffd8) is not in xen space
(XEN) GDB connection activated.


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