diff options
Diffstat (limited to 'debian/patches-rt/0037-cpumask-Disable-CONFIG_CPUMASK_OFFSTACK-for-RT.patch')
| -rw-r--r-- | debian/patches-rt/0037-cpumask-Disable-CONFIG_CPUMASK_OFFSTACK-for-RT.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/debian/patches-rt/0037-cpumask-Disable-CONFIG_CPUMASK_OFFSTACK-for-RT.patch b/debian/patches-rt/0037-cpumask-Disable-CONFIG_CPUMASK_OFFSTACK-for-RT.patch new file mode 100644 index 000000000..f5e098023 --- /dev/null +++ b/debian/patches-rt/0037-cpumask-Disable-CONFIG_CPUMASK_OFFSTACK-for-RT.patch @@ -0,0 +1,76 @@ +From ecd952b9f170afff929edaa1b5b7a172b07881c8 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Wed, 14 Dec 2011 01:03:49 +0100 +Subject: [PATCH 037/347] cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +There are "valid" GFP_ATOMIC allocations such as + +|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:931 +|in_atomic(): 1, irqs_disabled(): 0, pid: 2130, name: tar +|1 lock held by tar/2130: +| #0: (&mm->mmap_sem){++++++}, at: [<ffffffff811d4e89>] SyS_brk+0x39/0x190 +|Preemption disabled at:[<ffffffff81063048>] flush_tlb_mm_range+0x28/0x350 +| +|CPU: 1 PID: 2130 Comm: tar Tainted: G W 4.8.2-rt2+ #747 +|Call Trace: +| [<ffffffff814d52dc>] dump_stack+0x86/0xca +| [<ffffffff810a26fb>] ___might_sleep+0x14b/0x240 +| [<ffffffff819bc1d4>] rt_spin_lock+0x24/0x60 +| [<ffffffff81194fba>] get_page_from_freelist+0x83a/0x11b0 +| [<ffffffff81195e8b>] __alloc_pages_nodemask+0x15b/0x1190 +| [<ffffffff811f0b81>] alloc_pages_current+0xa1/0x1f0 +| [<ffffffff811f7df5>] new_slab+0x3e5/0x690 +| [<ffffffff811fb0d5>] ___slab_alloc+0x495/0x660 +| [<ffffffff811fb311>] __slab_alloc.isra.79+0x71/0xc0 +| [<ffffffff811fb447>] __kmalloc_node+0xe7/0x240 +| [<ffffffff814d4ee0>] alloc_cpumask_var_node+0x20/0x50 +| [<ffffffff814d4f3e>] alloc_cpumask_var+0xe/0x10 +| [<ffffffff810430c1>] native_send_call_func_ipi+0x21/0x130 +| [<ffffffff8111c13f>] smp_call_function_many+0x22f/0x370 +| [<ffffffff81062b64>] native_flush_tlb_others+0x1a4/0x3a0 +| [<ffffffff8106309b>] flush_tlb_mm_range+0x7b/0x350 +| [<ffffffff811c88e2>] tlb_flush_mmu_tlbonly+0x62/0xd0 +| [<ffffffff811c9af4>] tlb_finish_mmu+0x14/0x50 +| [<ffffffff811d1c84>] unmap_region+0xe4/0x110 +| [<ffffffff811d3db3>] do_munmap+0x293/0x470 +| [<ffffffff811d4f8c>] SyS_brk+0x13c/0x190 +| [<ffffffff810032e2>] do_fast_syscall_32+0xb2/0x2f0 +| [<ffffffff819be181>] entry_SYSENTER_compat+0x51/0x60 + +which forbid allocations at run-time. + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +--- + arch/x86/Kconfig | 2 +- + lib/Kconfig | 1 + + 2 files changed, 2 insertions(+), 1 deletion(-) + +diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig +index be4403a8e1b4..a8ec5d0c024e 100644 +--- a/arch/x86/Kconfig ++++ b/arch/x86/Kconfig +@@ -935,7 +935,7 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT + config MAXSMP + bool "Enable Maximum number of SMP Processors and NUMA Nodes" + depends on X86_64 && SMP && DEBUG_KERNEL +- select CPUMASK_OFFSTACK ++ select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL + ---help--- + Enable maximum number of CPUS and NUMA Nodes for this architecture. + If unsure, say N. +diff --git a/lib/Kconfig b/lib/Kconfig +index 714ec2f50bb1..4857bb4c490a 100644 +--- a/lib/Kconfig ++++ b/lib/Kconfig +@@ -440,6 +440,7 @@ config CHECK_SIGNATURE + + config CPUMASK_OFFSTACK + bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS ++ depends on !PREEMPT_RT_FULL + help + Use dynamic allocation for cpumask_var_t, instead of putting + them on the stack. This is a bit more expensive, but avoids +-- +2.36.1 + |