kernel-ark/init
Paul E. McKenney f4579fc57c rcu: Fix attempt to avoid unsolicited offloading of callbacks
Commit b58cc46c5f (rcu: Don't offload callbacks unless specifically
requested) failed to adjust the callback lists of the CPUs that are
known to be no-CBs CPUs only because they are also nohz_full= CPUs.
This failure can result in callbacks that are posted during early boot
getting stranded on nxtlist for CPUs whose no-CBs property becomes
apparent late, and there can also be spurious warnings about offline
CPUs posting callbacks.

This commit fixes these problems by adding an early-boot rcu_init_nohz()
that properly initializes the no-CBs CPUs.

Note that kernels built with CONFIG_RCU_NOCB_CPU_ALL=y or with
CONFIG_RCU_NOCB_CPU=n do not exhibit this bug.  Neither do kernels
booted without the nohz_full= boot parameter.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2014-09-16 10:07:59 -07:00
..
calibrate.c kernel: add calibration_delay_done() 2014-06-16 12:47:39 -06:00
do_mounts_initrd.c
do_mounts_md.c
do_mounts_rd.c initramfs: support initramfs that is bigger than 2GiB 2014-08-08 15:57:26 -07:00
do_mounts.c init: make rootdelay=N consistent with rootwait behaviour 2014-08-08 15:57:18 -07:00
do_mounts.h
init_task.c
initramfs.c initramfs: add write error checks 2014-08-08 15:57:26 -07:00
Kconfig rcu: Fix attempt to avoid unsolicited offloading of callbacks 2014-09-16 10:07:59 -07:00
main.c rcu: Fix attempt to avoid unsolicited offloading of callbacks 2014-09-16 10:07:59 -07:00
Makefile
noinitramfs.c
version.c