blob: c90e0baa5f0ae468ff58286151b196adc2c1012e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
From 3d8d7beacea4da55fdd1b45bc8d5c19da1438dcb Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 21 Sep 2011 19:57:12 +0200
Subject: [PATCH 178/323] signal: Revert ptrace preempt magic
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
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(-)
diff --git a/kernel/signal.c b/kernel/signal.c
index e487c4660921..5ab628e2afc5 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2193,16 +2193,8 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t
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);
cgroup_enter_frozen();
- preempt_enable_no_resched();
freezable_schedule();
cgroup_leave_frozen(true);
} else {
--
2.43.0
|
