Re: [PATCH 06/10] signal: fix premature completion of group stopwhen interfered by ptrace

From: Tejun Heo
Date: Mon Jan 31 2011 - 06:00:20 EST


On Fri, Jan 28, 2011 at 01:22:57PM -0800, Roland McGrath wrote:
> It feels nasty to add a word to task_struct just for this.
> I don't see another place to store such bookkeeping bits.

I have plans on separate out ptrace related stuff from task_struct so
that they're allocate iff they're used which will save some tens of
bytes on the task struct, so there at least is a plan to compensate
for the added cruft.

> But I'm not entirely convinced that we'll really need them when we
> conclude on fully cleaning up the whole picture.

I really don't know at this point. I tried to make it share one of
the related fields but there needs to be a per-task field which is
protected by siglock and there currently isn't any, so...


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