| Subject: signal: Revert ptrace preempt magic |
| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Wed, 21 Sep 2011 19:57:12 +0200 |
| |
| Upstream commit '53da1d9456fe7f8 fix ptrace slowness' is nothing more |
| than a bandaid around the ptrace design trainwreck. It's not a |
| correctness issue, it's merily a cosmetic bandaid. |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| --- |
| kernel/signal.c | 8 -------- |
| 1 file changed, 8 deletions(-) |
| |
| --- a/kernel/signal.c |
| +++ b/kernel/signal.c |
| @@ -1865,15 +1865,7 @@ static void ptrace_stop(int exit_code, i |
| if (gstop_done && ptrace_reparented(current)) |
| do_notify_parent_cldstop(current, false, why); |
| |
| - /* |
| - * Don't want to allow preemption here, because |
| - * sys_ptrace() needs this task to be inactive. |
| - * |
| - * XXX: implement read_unlock_no_resched(). |
| - */ |
| - preempt_disable(); |
| read_unlock(&tasklist_lock); |
| - preempt_enable_no_resched(); |
| freezable_schedule(); |
| } else { |
| /* |
