----- Original Message ----- > Here is a patch against crash v6.0.2 that adds duplicate node detection > per-CPU for the CFS runqueue display in dump_CFS_runqueues() for the > runq command. > > This resolves the failure to bail-out of the unending looping display I > get with the crash dump I have that has a corrupted CFS runqueue > containing a loop. > > Signed-off-by: David Mair <[email protected]> > ---
That was quick! I'm going to have to re-work this patch slightly because of the queued changes for crash-6.0.3 that are based upon Daisuke's runq patch: [Crash-utility] [PATCH] runq: search current task's runqueue explicitly https://www.redhat.com/archives/crash-utility/2012-January/msg00009.html I'm going to try to get a release out in the next day or two. Thanks, Dave > > task.c | 9 ++++++++- > 1 files changed, 8 insertions(+), 1 deletions(-) > > diff --git a/task.c b/task.c > index 433a043..0333fe8 100755 > --- a/task.c > +++ b/task.c > @@ -7050,7 +7050,12 @@ dump_tasks_in_cfs_rq(ulong cfs_rq, ulong skip) > OFFSET(sched_entity_run_node)); > if (!tc) > continue; > - dump_task_runq_entry(tc); > + if (hq_enter((ulong)tc)) { > + dump_task_runq_entry(tc); > + } else { > + error(WARNING, "Duplicate CFS runqueue node, task %lx, > probable > loop\n", tc->task); > + return total; > + } > total++; > } > > @@ -7217,10 +7222,12 @@ dump_CFS_runqueues(void) > fprintf(fp, " CFS RB_ROOT: %lx\n", (ulong)root); > > tot = 0; > + hq_open(); > if (curr_cfs_rq) > tot += dump_tasks_in_cfs_rq(curr_cfs_rq, 0); > if (cfs_rq != curr_cfs_rq) > tot += dump_tasks_in_cfs_rq(cfs_rq, curr_cfs_rq); > + hq_close(); > if (!tot) { > INDENT(5); > fprintf(fp, "[no tasks queued]\n"); > > -- > Crash-utility mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/crash-utility > -- Crash-utility mailing list [email protected] https://www.redhat.com/mailman/listinfo/crash-utility
