lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 16 Aug 2022 20:48:37 +0800 From: Zhen Lei <thunder.leizhen@...wei.com> To: "Paul E . McKenney" <paulmck@...nel.org>, Frederic Weisbecker <frederic@...nel.org>, Neeraj Upadhyay <quic_neeraju@...cinc.com>, "Josh Triplett" <josh@...htriplett.org>, Steven Rostedt <rostedt@...dmis.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Lai Jiangshan <jiangshanlai@...il.com>, Joel Fernandes <joel@...lfernandes.org>, <rcu@...r.kernel.org>, <linux-kernel@...r.kernel.org> CC: Zhen Lei <thunder.leizhen@...wei.com> Subject: [PATCH v3 0/2] rcu/nocb: Delete local variable 'need_rcu_nocb_mask' in rcu_init_nohz() v2 --> v3: 1. Eliminate rcu_state.nocb_is_setup 2. Update the code based on the above patch and commit b37a667c6242 ("rcu/nocb: Add an option to offload all CPUs on boot"). Test cases and test results as below: ---------------------------------------------------------------------- | CONFIG_NO_HZ_FULL | CONFIG_RCU_NOCB_CPU_DEFAULT_ALL | cmdline | ---------------------------------------------------------------------- 1) N | N | none | 2) N | N | rcu_nocbs=1-2 | 3) Y | N | nohz_full=1-2 | 4) Y | Y | none | ---------------------------------------------------------------------- 1) [ 1085.691770] rcu-torture:--- End of test: SUCCESS: (default) root@...ericarmv8:~# dmesg | grep "Offload RCU callbacks" [ 0.000000] rcu: Offload RCU callbacks from CPUs: (none). root@...ericarmv8:~# zcat /proc/config.gz | grep NOCB CONFIG_RCU_NOCB_CPU=y # CONFIG_RCU_NOCB_CPU_DEFAULT_ALL is not set root@...ericarmv8:~# zcat /proc/config.gz | grep NO_HZ_FULL # CONFIG_NO_HZ_FULL is not set root@...ericarmv8:~# cat /proc/cmdline console=ttyAMA0 root=/dev/vda2 crashkernel=256M@...00000 2) [ 1022.532198] rcu-torture:--- End of test: SUCCESS: (default) root@...ericarmv8:~# dmesg | grep "Offload RCU callbacks" [ 0.000000] rcu: Offload RCU callbacks from CPUs: 1-2. root@...ericarmv8:~# zcat /proc/config.gz | grep NOCB CONFIG_RCU_NOCB_CPU=y # CONFIG_RCU_NOCB_CPU_DEFAULT_ALL is not set root@...ericarmv8:~# zcat /proc/config.gz | grep NO_HZ_FULL # CONFIG_NO_HZ_FULL is not set root@...ericarmv8:~# cat /proc/cmdline console=ttyAMA0 root=/dev/vda2 crashkernel=256M@...00000 rcu_nocbs=1-2 3) [ 1011.714712] rcu-torture:--- End of test: SUCCESS: (default) root@...ericarmv8:~# dmesg | grep "Offload RCU callbacks" [ 0.000000] rcu: Offload RCU callbacks from CPUs: 1-2. root@...ericarmv8:~# zcat /proc/config.gz | grep NOCB CONFIG_RCU_NOCB_CPU=y # CONFIG_RCU_NOCB_CPU_DEFAULT_ALL is not set root@...ericarmv8:~# zcat /proc/config.gz | grep NO_HZ_FULL CONFIG_NO_HZ_FULL=y root@...ericarmv8:~# cat /proc/cmdline console=ttyAMA0 root=/dev/vda2 crashkernel=256M@...00000 nohz_full=1-2 4) [ 1031.047094] rcu-torture:--- End of test: SUCCESS: (default) root@...ericarmv8:~# dmesg | grep "Offload RCU callbacks" [ 0.000000] rcu: Offload RCU callbacks from CPUs: 0-3. root@...ericarmv8:~# zcat /proc/config.gz | grep NOCB CONFIG_RCU_NOCB_CPU=y CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y root@...ericarmv8:~# zcat /proc/config.gz | grep NO_HZ_FULL CONFIG_NO_HZ_FULL=y root@...ericarmv8:~# cat /proc/cmdline console=ttyAMA0 root=/dev/vda2 crashkernel=256M@...00000 v1 --> v2: Update commit message. Zhen Lei (2): rcu: Eliminate rcu_state.nocb_is_setup rcu: Simplify the code logic of rcu_init_nohz() kernel/rcu/tree.h | 1 - kernel/rcu/tree_nocb.h | 38 +++++++++++--------------------------- 2 files changed, 11 insertions(+), 28 deletions(-) -- 2.25.1
Powered by blists - more mailing lists