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-rw-r--r--init/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 161acd8bc56f..cf7e4824c8d0 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -883,6 +883,16 @@ config ARCH_SUPPORTS_NUMA_BALANCING
bool
#
+# For architectures that prefer to flush all TLBs after a number of pages
+# are unmapped instead of sending one IPI per page to flush. The architecture
+# must provide guarantees on what happens if a clean TLB cache entry is
+# written after the unmap. Details are in mm/rmap.c near the check for
+# should_defer_flush. The architecture should also consider if the full flush
+# and the refill costs are offset by the savings of sending fewer IPIs.
+config ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
+ bool
+
+#
# For architectures that know their GCC __int128 support is sound
#
config ARCH_SUPPORTS_INT128