Merge tag 'tty-4.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

[mirror_ubuntu-zesty-kernel.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index ecb9e75614bf87f1e368074d6ef84bfe3f1003b8..8bfd1aca7a3d01a9887700b3f90d1d5697a9dab4 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1400,6 +1400,21 @@ config RCU_EQS_DEBUG
 
 endmenu # "RCU Debugging"
 
+config DEBUG_WQ_FORCE_RR_CPU
+       bool "Force round-robin CPU selection for unbound work items"
+       depends on DEBUG_KERNEL
+       default n
+       help
+         Workqueue used to implicitly guarantee that work items queued
+         without explicit CPU specified are put on the local CPU.  This
+         guarantee is no longer true and while local CPU is still
+         preferred work items may be put on foreign CPUs.  Kernel
+         parameter "workqueue.debug_force_rr_cpu" is added to force
+         round-robin CPU selection to flush out usages which depend on the
+         now broken guarantee.  This config option enables the debug
+         feature by default.  When enabled, memory and cache locality will
+         be impacted.
+
 config DEBUG_BLOCK_EXT_DEVT
         bool "Force extended block device numbers and spread them"
        depends on DEBUG_KERNEL