[PATCH v3 09/35] mm: introduce CONFIG_PER_VMA_LOCK
From: Suren Baghdasaryan <surenb@google.com>
Date: 2023-02-16 05:19:05
Also in:
linux-mm, lkml
Subsystem:
memory management, memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
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
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2.39.1