diff mbox series

[v4,09/33] mm: introduce CONFIG_PER_VMA_LOCK

Message ID 20230227173632.3292573-10-surenb@google.com (mailing list archive)
State Handled Elsewhere, archived
Headers show
Series Per-VMA locks | expand

Commit Message

Suren Baghdasaryan Feb. 27, 2023, 5:36 p.m. UTC 
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 mbox series

Patch

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"
 
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