[Gluster-devel] spurious failure with sparse-file-heal.t test

[Krishnan Parthasarathi]

> This seems to happen because of race between STACK_RESET and stack
> statedump. Still thinking how to fix it without taking locks around
> writing to file.

Why should we still keep the stack being reset as part of pending pool of
frames? Even we if we had to (can't guess why?), when we remove we should do
the following to prevent gf_proc_dump_pending_frames from crashing.

...

call_frame_t *toreset = NULL;

LOCK (&stack->pool->lock)
{
  toreset = stack->frames;
  stack->frames = NULL;
}
UNLOCK (&stack->pool->lock);

...

Now, perform all operations that are done on stack->frames on toreset
instead. Thoughts?