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Subject[RFC PATCH] arm64: defconfig: Disable fine-grained task level IRQ time accounting
Date
In the current arm64 defconfig, CONFIG_IRQ_TIME_ACCOUNTING is enabled as
default. According to my tests on NXP's LayerScape and i.MX platforms,
the system hangs when running the command "stress-ng --hrtimers 1" with
CONFIG_IRQ_TIME_ACCOUNTING enabled. Disabling this option, the issue
disappears. CONFIG_IRQ_TIME_ACCOUNTING causes serious performance impact
when running hrtimer stress test at the same time.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
---
arch/arm64/configs/defconfig | 1 -
1 file changed, 1 deletion(-)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index e0f33826819f..ff1c11d8b10b 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -4,7 +4,6 @@ CONFIG_AUDIT=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT=y
-CONFIG_IRQ_TIME_ACCOUNTING=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASK_XACCT=y
--
2.17.1
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