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authorRui Salvaterra <rsalvaterra@gmail.com>2021-08-22 14:50:07 +0100
committerHauke Mehrtens <hauke@hauke-m.de>2021-08-29 17:03:38 +0200
commit7e135add24911a9302d9e73fe0456318ce8169fa (patch)
treee21e070b8d90f6d5c01fa8089b134176252220fb /target/linux/rockchip
parentb8f8d0651c9ec2a6f4a869fc262d2ba38d723b1f (diff)
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kernel: disable CONFIG_RCU_EXPERT and friends
Based on the existing documentation [1][2], I dare anyone to demonstrate that we need to fine-tune these RCU parameters. The (performance) breakage potential for doing so is immense, so let's just please put down this loaded footgun. Disable CONFIG_RCU_EXPERT and its dependent symbols. Additionally, remove the CONFIG_RCU_EXPERT symbol from the target kconfigs which contain it. [1] https://www.kernel.org/doc/Documentation/RCU/Design/Data-Structures/Data-Structures.html [2] https://lwn.net/Articles/777214/ Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
Diffstat (limited to 'target/linux/rockchip')
-rw-r--r--target/linux/rockchip/armv8/config-5.101
-rw-r--r--target/linux/rockchip/armv8/config-5.41
2 files changed, 0 insertions, 2 deletions
diff --git a/target/linux/rockchip/armv8/config-5.10 b/target/linux/rockchip/armv8/config-5.10
index 3b03333af0..36a3cefaf1 100644
--- a/target/linux/rockchip/armv8/config-5.10
+++ b/target/linux/rockchip/armv8/config-5.10
@@ -483,7 +483,6 @@ CONFIG_RAS=y
CONFIG_RATIONAL=y
# CONFIG_RAVE_SP_CORE is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=21
-# CONFIG_RCU_EXPERT is not set
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_TRACE=y
diff --git a/target/linux/rockchip/armv8/config-5.4 b/target/linux/rockchip/armv8/config-5.4
index d3c2cd985a..0a2575adbf 100644
--- a/target/linux/rockchip/armv8/config-5.4
+++ b/target/linux/rockchip/armv8/config-5.4
@@ -463,7 +463,6 @@ CONFIG_RAS=y
CONFIG_RATIONAL=y
# CONFIG_RAVE_SP_CORE is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=21
-# CONFIG_RCU_EXPERT is not set
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_TRACE=y