Dave, I tried a similar modification and got a similar result. It read [no tasks queued] for both RT and CFS but there are some "RU" tasks shown by ps command, and there are some tasks with "on_rq = 1". I have not figured out the reason. Best Regards, Takuo > > >----- Original Message ----- >> Dave, >> >> Toshi's patch works fine for me. >> >> Apart from this, runq command does not work against my vmcore(non-SMP). >> >> runq fails with the following message. >> I am afraid it might be another CONFIG_SMP related issue. >> >> crash> set debug 10 >> debug: 10 >> crash> runq >> runq: per_cpu_symbol_search(per_cpu__runqueues): NULL >> runq: per-cpu runqueues does not exist >> crash> >> >> Takuo > >Hi Takuo, > > >--- task.c.orig 2011-06-27 10:33:51.000000000 -0400 >+++ task.c 2011-06-27 10:47:13.000000000 -0400 >@@ -6970,8 +6970,13 @@ > "prio"); > } > >- if (!(rq_sp = per_cpu_symbol_search("per_cpu__runqueues"))) >- error(FATAL, "per-cpu runqueues does not exist\n"); >+ if (!(rq_sp = per_cpu_symbol_search("per_cpu__runqueues"))) { >+ if (!(kt->flags & SMP) && !(kt->flags & PER_CPU_OFF)) { >+ if (!(rq_sp = symbol_search("runqueues"))) >+ error(FATAL, "runqueues does not exist\n"); >+ } else >+ error(FATAL, "per-cpu runqueues does not exist\n"); >+ } > > runqbuf = GETBUF(SIZE(runqueue)); > if ((init_sp = per_cpu_symbol_search("per_cpu__init_cfs_rq"))) > >and it shows: > > crash> runq > CPU 0 RUNQUEUE: c0396c78 > CURRENT: PID: 0 TASK: c0388ee0 COMMAND: "swapper" > RT PRIO_ARRAY: c0396d28 > [no tasks queued] > CFS RB_ROOT: c0396d00 > [no tasks queued] > crash> > >but a true test would have something other than an idle state with no >other tasks queued. > >And the "timer" command will definitely require a bit more work. > >Dave > >-- >Crash-utility mailing list >Crash-utility(a)redhat.com >https://www.redhat.com/mailman/listinfo/crash-utility >