mm/hwpoison: fix failure to split thp w/ refcount held

[cascardo/linux.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index bb9b4dd..9cabd86 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -882,6 +882,16 @@ config GENERIC_SCHED_CLOCK
 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
 #
@@ -917,7 +927,6 @@ config NUMA_BALANCING_DEFAULT_ENABLED
 menuconfig CGROUPS
        bool "Control Group support"
        select KERNFS
-       select PERCPU_RWSEM
        help
          This option adds support for grouping sets of processes together, for
          use with process control subsystems such as Cpusets, CFS, memory
@@ -1576,6 +1585,14 @@ config ADVISE_SYSCALLS
          applications use these syscalls, you can disable this option to save
          space.
 
+config USERFAULTFD
+       bool "Enable userfaultfd() system call"
+       select ANON_INODES
+       depends on MMU
+       help
+         Enable the userfaultfd() system call that allows to intercept and
+         handle page faults in userland.
+
 config PCI_QUIRKS
        default y
        bool "Enable PCI quirk workarounds" if EXPERT