[Devel] Re: [PATCH 2/3] restart debug: add final process tree status

[Oren Laadan]

Serge E. Hallyn wrote:
> Have tasks in sys_restart keep some status in a list off
> of checkpoint_ctx, and print this info when the checkpoint_ctx
> is freed.
> 
> This is mostly an RFC - in particular the error tracking is
> pretty half-hearted so far.  But the info it does spit out
> helped me to figured out the coordinator syncing problem
> fixed by the previous patch.
> 
> Sample dmesg output:
> [4568:4568:c/r:free_per_task_status:200] 4 tasks registered, nr_tasks was 0 nr_total 0
> [4568:4568:c/r:free_per_task_status:202] active pid was 1, ctx->errno 0
> [4568:4568:c/r:free_per_task_status:204] kflags 6 uflags 0 oflags 1
> [4568:4568:c/r:free_per_task_status:206] task 0 to run was 4568
> [4568:4568:c/r:free_per_task_status:209] pid 4566
> [4568:4568:c/r:free_per_task_status:211] it was coordinator
> [4568:4568:c/r:free_per_task_status:219] it was running
> [4568:4568:c/r:free_per_task_status:209] pid 4570
> [4568:4568:c/r:free_per_task_status:213] it was a ghost
> [4568:4568:c/r:free_per_task_status:209] pid 4569
> [4568:4568:c/r:free_per_task_status:213] it was a ghost
> [4568:4568:c/r:free_per_task_status:209] pid 4568
> [4568:4568:c/r:free_per_task_status:215] it was the root task
> [4568:4568:c/r:free_per_task_status:221] it was a normal task
> 
> So, when one task died before hitting sys_restart, the first line would
> show '3 tasks registered'.
> 
> Signed-off-by: Serge E. Hallyn <serue at us.ibm.com>

[...]

This looks pretty useful. Any chance you can you make it work on top
of the 5-patch series I posted ... ?

Thanks,

Oren.
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