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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0178-signal-Revert-ptrace-preempt-magic.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/debian/patches-rt/0178-signal-Revert-ptrace-preempt-magic.patch b/debian/patches-rt/0178-signal-Revert-ptrace-preempt-magic.patch new file mode 100644 index 000000000..c90e0baa5 --- /dev/null +++ b/debian/patches-rt/0178-signal-Revert-ptrace-preempt-magic.patch @@ -0,0 +1,39 @@ +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 + |