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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0264-jump-label-disable-if-stop_machine-is-used.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/debian/patches-rt/0264-jump-label-disable-if-stop_machine-is-used.patch b/debian/patches-rt/0264-jump-label-disable-if-stop_machine-is-used.patch new file mode 100644 index 000000000..168745160 --- /dev/null +++ b/debian/patches-rt/0264-jump-label-disable-if-stop_machine-is-used.patch @@ -0,0 +1,42 @@ +From 915e18f01ac0c97a6dc374b940a96a105bf57c62 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Wed, 8 Jul 2015 17:14:48 +0200 +Subject: [PATCH 264/323] jump-label: disable if stop_machine() is used +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz + +Some architectures are using stop_machine() while switching the opcode which +leads to latency spikes. +The architectures which use stop_machine() atm: +- ARM stop machine +- s390 stop machine + +The architecures which use other sorcery: +- MIPS +- X86 +- powerpc +- sparc +- arm64 + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +[bigeasy: only ARM for now] +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + arch/arm/Kconfig | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig +index ee2cbe8ad502..73c55cb2f296 100644 +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -67,7 +67,7 @@ config ARM + select HARDIRQS_SW_RESEND + select HAVE_ARCH_AUDITSYSCALL if AEABI && !OABI_COMPAT + select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 +- select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU ++ select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU && !PREEMPT_RT + select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU + select HAVE_ARCH_MMAP_RND_BITS if MMU + select HAVE_ARCH_SECCOMP +-- +2.43.0 + |