Re: [Crash-utility] cannot determine idle task and cannot resolve init_task_union on x86

Steve Dickson wrote: > Hello, > > I'm getting the following errors using crash 4.0-2.22 on a > 2.6.16-1.2087_FC5.smp kernel. > > crash: cannot determine idle task addresses from init_tasks[] or > runqueues[] > > crash: cannot resolve "init_task_union" > > Now I just read the threads about this same error on > ppc64 as well as read the crash version 4.0-2.21 is available > release notes, but this is happening on x86 UP kernel > (although I'm using an SMP kernel) and with the latest > crash version 4.0-2.22 > > any ideas? > > steved. > > Disclaimer: I don't follow this mailing list as close as I probably > should so I'll pre-apologize is this has already been discussed > in a previous thread... If so please simply send the pointer... > > -- > Crash-utility mailing list > Crash-utility(a)redhat.com > https://www.redhat.com/mailman/listinfo/crash-utility In this particular kernel, does the runqueue data structure now contain a new "cpu" member? (It's also described in the new crash.TODO file on my people site). If so, try adding the attached patch to kernel.c. Dave ------------------------------------------------------------------------ diff -u -r1.131 kernel.c --- kernel.c 23 Mar 2006 20:33:48 -0000 1.131 +++ kernel.c 3 Apr 2006 18:21:01 -0000 @@ -152,7 +152,8 @@ kt->flags |= PER_CPU_OFF; } MEMBER_OFFSET_INIT(runqueue_cpu, "runqueue", "cpu"); - if (VALID_MEMBER(runqueue_cpu)) { + if (VALID_MEMBER(runqueue_cpu) && + (get_array_length("runqueue.cpu", NULL, 0) > 0)) { MEMBER_OFFSET_INIT(cpu_s_curr, "cpu_s", "curr"); MEMBER_OFFSET_INIT(cpu_s_idle, "cpu_s", "idle"); STRUCT_SIZE_INIT(cpu_s, "cpu_s"); @@ -177,6 +178,7 @@ } else { MEMBER_OFFSET_INIT(runqueue_idle, "runqueue", "idle"); MEMBER_OFFSET_INIT(runqueue_curr, "runqueue", "curr"); + ASSIGN_OFFSET(runqueue_cpu) = INVALID_OFFSET; } MEMBER_OFFSET_INIT(runqueue_active, "runqueue", "active"); MEMBER_OFFSET_INIT(runqueue_expired, "runqueue", "expired"); ------------------------------------------------------------------------ -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility