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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:38 +0000
commit08b74a000942a380fe028845f92cd3a0dee827d5 (patch)
treeaa78b4e12607c3e1fcce8d5cc42df4330792f118 /debian/patches-rt/0032-signal-Revert-ptrace-preempt-magic.patch
parentAdding upstream version 4.19.249. (diff)
downloadlinux-debian.tar.xz
linux-debian.zip
Adding debian version 4.19.249-2.debian/4.19.249-2debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0032-signal-Revert-ptrace-preempt-magic.patch')
-rw-r--r--debian/patches-rt/0032-signal-Revert-ptrace-preempt-magic.patch38
1 files changed, 38 insertions, 0 deletions
diff --git a/debian/patches-rt/0032-signal-Revert-ptrace-preempt-magic.patch b/debian/patches-rt/0032-signal-Revert-ptrace-preempt-magic.patch
new file mode 100644
index 000000000..584eaea9c
--- /dev/null
+++ b/debian/patches-rt/0032-signal-Revert-ptrace-preempt-magic.patch
@@ -0,0 +1,38 @@
+From a52b4b412745dea30d5833c35df527de9aceaf70 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Wed, 21 Sep 2011 19:57:12 +0200
+Subject: [PATCH 032/347] signal: Revert ptrace preempt magic
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.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 4cc3f3ba13a9..23764988b5d1 100644
+--- a/kernel/signal.c
++++ b/kernel/signal.c
+@@ -2099,15 +2099,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, siginfo_t *info)
+ 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 {
+ /*
+--
+2.36.1
+