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From: Rik van Riel <riel@surriel.com>
To: linux-kernel@vger.kernel.org
Cc: kernel-team@fb.com, peterz@infradead.org, luto@kernel.org,
	x86@kernel.org, vkuznets@redhat.com, mingo@kernel.org,
	efault@gmx.de, dave.hansen@intel.com, will.daecon@arm.com,
	catalin.marinas@arm.com, benh@kernel.crashing.org,
	Rik van Riel <riel@surriel.com>
Subject: [PATCH 08/10] arch,mm: add config variable to skip lazy TLB mm refcounting
Date: Sat, 28 Jul 2018 17:53:55 -0400	[thread overview]
Message-ID: <20180728215357.3249-9-riel@surriel.com> (raw)
In-Reply-To: <20180728215357.3249-1-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


  parent reply	other threads:[~2018-07-28 21:54 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-28 21:53 [PATCH 0/10] x86,tlb,mm: more lazy TLB cleanups & optimizations Rik van Riel
2018-07-28 21:53 ` [PATCH 01/10] x86,tlb: clarify memory barrier in switch_mm_irqs_off Rik van Riel
2018-07-29  2:59   ` Andy Lutomirski
2018-07-28 21:53 ` [PATCH 02/10] smp: use __cpumask_set_cpu in on_each_cpu_cond Rik van Riel
2018-07-29  2:59   ` Andy Lutomirski
2018-07-28 21:53 ` [PATCH 03/10] smp,cpumask: introduce on_each_cpu_cond_mask Rik van Riel
2018-07-29  2:57   ` Andy Lutomirski
2018-07-29 12:00     ` Rik van Riel
     [not found]       ` <E710FBA5-CC5E-4941-ACBF-4AB3424F1F68@amacapital.net>
2018-07-29 17:39         ` Rik van Riel
2018-07-29 17:51         ` Rik van Riel
2018-07-29 18:55           ` Andy Lutomirski
2018-07-29 19:56             ` Linus Torvalds
2018-07-28 21:53 ` [PATCH 04/10] x86,mm: use on_each_cpu_cond for TLB flushes Rik van Riel
2018-07-29  2:58   ` Andy Lutomirski
2018-07-29 12:02     ` Rik van Riel
2018-07-28 21:53 ` [PATCH 05/10] mm,tlb: turn dummy defines into inline functions Rik van Riel
2018-07-28 21:53 ` [PATCH 06/10] mm,x86: skip cr4 and ldt reload when mm stays the same Rik van Riel
2018-07-29  4:21   ` Andy Lutomirski
2018-07-28 21:53 ` [PATCH 07/10] x86,mm: remove leave_mm cpu argument Rik van Riel
2018-07-28 21:53 ` Rik van Riel [this message]
2018-07-28 21:53 ` [PATCH 09/10] mm,x86: shoot down lazy TLB references at exit_mmap time Rik van Riel
2018-07-28 21:53 ` [PATCH 10/10] mm,sched: conditionally skip lazy TLB mm refcounting Rik van Riel
2018-07-29  4:21   ` Andy Lutomirski
2018-07-29 12:11     ` Rik van Riel
2018-07-29 15:29       ` Andy Lutomirski
2018-07-29 16:55         ` Rik van Riel
2018-07-29 19:54     ` [PATCH v2 10/11] x86,tlb: really leave mm on shootdown Rik van Riel
2018-07-29 19:54     ` [PATCH v2 11/11] mm,sched: conditionally skip lazy TLB mm refcounting Rik van Riel
2018-07-30  9:55       ` Peter Zijlstra
2018-07-30 14:30         ` Rik van Riel
2018-07-30 16:26           ` Peter Zijlstra
2018-07-30 19:15             ` Rik van Riel
2018-07-30 19:30               ` Andy Lutomirski
2018-07-30 19:36                 ` Rik van Riel
2018-07-30 19:49                   ` Andy Lutomirski
2018-07-30 21:46                     ` Rik van Riel
2018-07-30 22:00                       ` Andy Lutomirski
2018-07-31  1:05             ` Rik van Riel
2018-07-31  9:12               ` Peter Zijlstra
2018-07-31 14:29                 ` Andy Lutomirski
2018-07-31 15:03                   ` Rik van Riel
2018-07-31 15:12                     ` Peter Zijlstra
2018-07-30 11:32 ` [PATCH 0/10] x86,tlb,mm: more lazy TLB cleanups & optimizations Ingo Molnar

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