From: Rik van Riel <riel@surriel.com>
To: linux-kernel@vger.kernel.org
Cc: kernel-team@fb.com, mingo@kernel.org, peterz@infradead.org,
luto@kernel.org, x86@kernel.org, efault@gmx.de,
dave.hansen@intel.com, Rik van Riel <riel@surriel.com>
Subject: [PATCH 08/11] arch,mm: add config variable to skip lazy TLB mm refcounting
Date: Wed, 1 Aug 2018 06:02:52 -0400 [thread overview]
Message-ID: <20180801100255.4278-9-riel@surriel.com> (raw)
In-Reply-To: <20180801100255.4278-1-riel@surriel.com>
Add a config variable indicating that this architecture does not require
lazy TLB mm refcounting, because lazy TLB mms get shot down instantly
at exit_mmap time.
Signed-off-by: Rik van Riel <riel@surriel.com>
---
arch/Kconfig | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/Kconfig b/arch/Kconfig
index 1aa59063f1fd..1baf1a176dbf 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -237,6 +237,10 @@ config ARCH_HAS_FORTIFY_SOURCE
config ARCH_HAS_SET_MEMORY
bool
+# Select if arch shoots down lazy TLB mms at exit time, instead of refcounting
+config ARCH_NO_ACTIVE_MM_REFCOUNTING
+ bool
+
# Select if arch init_task must go in the __init_task_data section
config ARCH_TASK_STRUCT_ON_STACK
bool
--
2.14.4
next prev parent reply other threads:[~2018-08-01 10:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-01 10:02 [PATCH v2 0/11] x86,tlb,mm: more lazy TLB cleanups & optimizations Rik van Riel
2018-08-01 10:02 ` [PATCH 01/11] x86,tlb: clarify memory barrier in switch_mm_irqs_off Rik van Riel
2018-08-01 10:02 ` [PATCH 02/11] smp: use __cpumask_set_cpu in on_each_cpu_cond Rik van Riel
2018-08-01 10:02 ` [PATCH 03/11] smp,cpumask: introduce on_each_cpu_cond_mask Rik van Riel
2018-08-01 10:02 ` [PATCH 04/11] x86,mm: use on_each_cpu_cond for TLB flushes Rik van Riel
2018-08-01 10:02 ` [PATCH 05/11] mm,tlb: turn dummy defines into inline functions Rik van Riel
2018-08-01 10:02 ` [PATCH 06/11] mm,x86: skip cr4 and ldt reload when mm stays the same Rik van Riel
2018-08-01 10:02 ` [PATCH 07/11] x86,mm: remove leave_mm cpu argument Rik van Riel
2018-08-01 10:02 ` Rik van Riel [this message]
2018-08-01 10:02 ` [PATCH 09/11] mm,x86: shoot down lazy TLB references at exit_mmap time Rik van Riel
2018-08-01 10:02 ` [PATCH 10/11] x86,tlb: really leave mm on shootdown Rik van Riel
2018-08-01 10:02 ` [PATCH 11/11] mm,sched: conditionally skip lazy TLB mm refcounting Rik van Riel
2018-08-03 15:56 ` Peter Zijlstra
2018-08-03 16:40 ` Rik van Riel
2018-08-03 17:25 ` Peter Zijlstra
2018-08-03 17:39 ` Rik van Riel
2018-08-06 17:50 ` Peter Zijlstra
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