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From: Suren Baghdasaryan <surenb@google.com>
To: akpm@linux-foundation.org
Cc: michel@lespinasse.org, jglisse@google.com, mhocko@suse.com,
	vbabka@suse.cz, hannes@cmpxchg.org, mgorman@techsingularity.net,
	dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com,
	peterz@infradead.org, ldufour@linux.ibm.com, paulmck@kernel.org,
	mingo@redhat.com, will@kernel.org, luto@kernel.org,
	songliubraving@fb.com, peterx@redhat.com, david@redhat.com,
	dhowells@redhat.com, hughd@google.com, bigeasy@linutronix.de,
	kent.overstreet@linux.dev, punit.agrawal@bytedance.com,
	lstoakes@gmail.com, peterjung1337@gmail.com, rientjes@google.com,
	chriscli@google.com, axelrasmussen@google.com, joelaf@google.com,
	minchan@google.com, rppt@kernel.org, jannh@google.com,
	shakeelb@google.com, tatashin@google.com, edumazet@google.com,
	gthelen@google.com, gurua@google.com, arjunroy@google.com,
	soheil@google.com, leewalsh@google.com, posk@google.com,
	michalechner92@googlemail.com, linux-mm@kvack.org,
	linux-arm-kernel@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, kernel-team@android.com,
	Suren Baghdasaryan <surenb@google.com>
Subject: [PATCH v3 09/35] mm: introduce CONFIG_PER_VMA_LOCK
Date: Wed, 15 Feb 2023 21:17:24 -0800	[thread overview]
Message-ID: <20230216051750.3125598-10-surenb@google.com> (raw)
In-Reply-To: <20230216051750.3125598-1-surenb@google.com>

This configuration variable will be used to build the support for VMA
locking during page fault handling.

This is enabled on supported architectures with SMP and MMU set.

The architecture support is needed since the page fault handler is called
from the architecture's page faulting code which needs modifications to
handle faults under VMA lock.

Signed-off-by: Suren Baghdasaryan <surenb@google.com>
---
 mm/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/mm/Kconfig b/mm/Kconfig
index ca98b2072df5..2e4a7e61768a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -1211,6 +1211,18 @@ config LRU_GEN_STATS
 	  This option has a per-memcg and per-node memory overhead.
 # }
 
+config ARCH_SUPPORTS_PER_VMA_LOCK
+       def_bool n
+
+config PER_VMA_LOCK
+	def_bool y
+	depends on ARCH_SUPPORTS_PER_VMA_LOCK && MMU && SMP
+	help
+	  Allow per-vma locking during page fault handling.
+
+	  This feature allows locking each virtual memory area separately when
+	  handling page faults instead of taking mmap_lock.
+
 source "mm/damon/Kconfig"
 
 endmenu
-- 
2.39.1


  parent reply	other threads:[~2023-02-16  5:19 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-16  5:17 [PATCH v3 00/35] Per-VMA locks Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 01/35] maple_tree: Be more cautious about dead nodes Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 02/35] maple_tree: Detect dead nodes in mas_start() Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 03/35] maple_tree: Fix freeing of nodes in rcu mode Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 04/35] maple_tree: remove extra smp_wmb() from mas_dead_leaves() Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 05/35] maple_tree: Fix write memory barrier of nodes once dead for RCU mode Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 06/35] maple_tree: Add smp_rmb() to dead node detection Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 07/35] maple_tree: Add RCU lock checking to rcu callback functions Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 08/35] mm: Enable maple tree RCU mode by default Suren Baghdasaryan
2023-02-16  5:17 ` Suren Baghdasaryan [this message]
2023-02-16  5:17 ` [PATCH v3 10/35] mm: rcu safe VMA freeing Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 11/35] mm: move mmap_lock assert function definitions Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 12/35] mm: add per-VMA lock and helper functions to control it Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 13/35] mm: mark VMA as being written when changing vm_flags Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 14/35] mm/mmap: move VMA locking before vma_adjust_trans_huge call Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 15/35] mm/khugepaged: write-lock VMA while collapsing a huge page Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 16/35] mm/mmap: write-lock VMAs before merging, splitting or expanding them Suren Baghdasaryan
2023-02-23 14:51   ` Hyeonggon Yoo
2023-02-23 14:59     ` Hyeonggon Yoo
2023-02-23 17:46     ` Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 17/35] mm/mmap: write-lock VMA before shrinking or expanding it Suren Baghdasaryan
2023-02-23 20:20   ` Liam R. Howlett
2023-02-23 20:28     ` Liam R. Howlett
2023-02-23 21:16       ` Suren Baghdasaryan
2023-02-24  1:46         ` Liam R. Howlett
2023-02-24  2:06           ` Suren Baghdasaryan
2023-02-24 16:14             ` Liam R. Howlett
2023-02-24 16:19               ` Suren Baghdasaryan
2023-02-27 17:33                 ` Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 18/35] mm/mremap: write-lock VMA while remapping it to a new address range Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 19/35] mm: write-lock VMAs before removing them from VMA tree Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 20/35] mm: conditionally write-lock VMA in free_pgtables Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 21/35] mm/mmap: write-lock adjacent VMAs if they can grow into unmapped area Suren Baghdasaryan
2023-02-16 15:34   ` Liam R. Howlett
2023-02-16 19:36     ` Suren Baghdasaryan
2023-02-17 14:50       ` Liam R. Howlett
2023-02-17 15:54         ` Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 22/35] kernel/fork: assert no VMA readers during its destruction Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 23/35] mm/mmap: prevent pagefault handler from racing with mmu_notifier registration Suren Baghdasaryan
2023-02-23 20:06   ` Liam R. Howlett
2023-02-23 20:29     ` Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 24/35] mm: introduce vma detached flag Suren Baghdasaryan
2023-02-23 20:08   ` Liam R. Howlett
2023-02-23 20:34     ` Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 25/35] mm: introduce lock_vma_under_rcu to be used from arch-specific code Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 26/35] mm: fall back to mmap_lock if vma->anon_vma is not yet set Suren Baghdasaryan
2023-02-16 15:44   ` Matthew Wilcox
2023-02-16 19:43     ` Suren Baghdasaryan
2023-02-17  2:14       ` Suren Baghdasaryan
2023-02-17 10:21         ` Hyeonggon Yoo
2023-02-17 16:13           ` Suren Baghdasaryan
2023-02-17 18:49             ` Hyeonggon Yoo
2023-02-17 16:05         ` Matthew Wilcox
2023-02-17 16:10           ` Suren Baghdasaryan
2023-04-03 19:49             ` Matthew Wilcox
2023-02-16  5:17 ` [PATCH v3 27/35] mm: add FAULT_FLAG_VMA_LOCK flag Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 28/35] mm: prevent do_swap_page from handling page faults under VMA lock Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 29/35] mm: prevent userfaults to be handled under per-vma lock Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 30/35] mm: introduce per-VMA lock statistics Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 31/35] x86/mm: try VMA lock-based page fault handling first Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 32/35] arm64/mm: " Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 33/35] powerc/mm: " Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 34/35] mm/mmap: free vm_area_struct without call_rcu in exit_mmap Suren Baghdasaryan
2023-02-16  5:17 ` [PATCH v3 35/35] mm: separate vma->lock from vm_area_struct Suren Baghdasaryan
2023-02-24  9:21 ` [PATCH v3 00/35] Per-VMA locks freak07
2023-02-27 16:50   ` Davidlohr Bueso
2023-02-27 17:22     ` Suren Baghdasaryan

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