Srivatsa Vaddagiri c3f5902325 [PATCH] Fix RCU race in access of nohz_cpu_mask ...

Accessing nohz_cpu_mask before incrementing rcp->cur is racy.  It can cause
tickless idle CPUs to be included in rsp->cpumask, which will extend
graceperiods unnecessarily.

Fix this race.  It has been tested using extensions to RCU torture module
that forces various CPUs to become idle.

Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2005-12-12 08:57:42 -08:00

..

irq

[PATCH] Check the irq number is within bounds

2005-11-23 11:11:28 -08:00

power

[PATCH] fix swsusp on machines not supporting S4

2005-11-29 19:47:03 -08:00

acct.c

[PATCH] saner handling of auto_acct_off() and DQUOT_OFF() in umount

2005-11-07 18:18:09 -08:00

audit.c

[PATCH] gfp_t: kernel/*

2005-10-28 08:16:49 -07:00

auditsc.c

[PATCH] gfp_t: kernel/*

2005-10-28 08:16:49 -07:00

capability.c

[PATCH] kernel/capability.c: add kerneldoc

2005-07-27 16:26:06 -07:00

compat.c

[PATCH] kernel: fix-up schedule_timeout() usage

2005-09-10 10:06:37 -07:00

configs.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

cpu.c

[PATCH] clean up lock_cpu_hotplug() in cpufreq

2005-11-28 14:42:23 -08:00

cpuset.c

[PATCH] cpuset: fix return without releasing semaphore

2005-11-13 18:14:11 -08:00

crash_dump.c

[PATCH] kernel/crash_dump.c: add kerneldoc

2005-07-27 16:26:06 -07:00

dma.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

exec_domain.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

exit.c

[PATCH] m68k: introduce task_thread_info

2005-11-13 18:14:13 -08:00

extable.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

fork.c

[PATCH] cpuset fork locking fix

2005-11-28 14:42:24 -08:00

futex.c

[PATCH] mm: unbloat get_futex_key

2005-11-23 16:08:38 -08:00

intermodule.c

[PATCH] introduce and use kzalloc

2005-09-07 16:57:45 -07:00

itimer.c

[PATCH] itimer fixes

2005-07-27 16:25:51 -07:00

kallsyms.c

[PATCH] fix missing includes

2005-10-30 17:37:32 -08:00

Kconfig.hz

[PATCH] i386: Selectable Frequency of the Timer Interrupt

2005-06-23 09:45:10 -07:00

Kconfig.preempt

[PATCH] sched: voluntary kernel preemption

2005-06-25 16:24:45 -07:00

kexec.c

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

kfifo.c

[PATCH] gfp flags annotations - part 1

2005-10-08 15:00:57 -07:00

kmod.c

[PATCH] Keys: Get rid of warning in kmod.c if keys disabled

2005-10-30 17:37:23 -08:00

kprobes.c

[PATCH] Kprobes: Reference count the modules when probed on it

2005-12-12 08:57:41 -08:00

ksysfs.c

[PATCH] Kdump: Export crash notes section address through sysfs

2005-06-25 16:24:51 -07:00

kthread.c

[PATCH] Add kthread_stop_sem()

2005-10-30 17:37:17 -08:00

Makefile

[PATCH] RCU torture-testing kernel module

2005-10-30 17:37:27 -08:00

module.c

[PATCH] fix remaining missing includes

2005-11-07 07:53:41 -08:00

panic.c

[PATCH] Call emergency_reboot from panic

2005-07-26 14:35:43 -07:00

params.c

[PATCH] fix missing includes

2005-10-30 17:37:32 -08:00

pid.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

posix-cpu-timers.c

[PATCH] fix 32bit overflow in timespec_to_sample()

2005-11-28 14:42:23 -08:00

posix-timers.c

[PATCH] timespec: normalize off by one errors

2005-11-13 18:14:17 -08:00

printk.c

[PATCH] Fix crash in unregister_console()

2005-11-23 16:08:39 -08:00

profile.c

[PATCH] mostly_read data section

2005-07-07 18:23:46 -07:00

ptrace.c

[PATCH] Fix crash when ptrace poking hugepage areas

2005-11-29 19:47:03 -08:00

rcupdate.c

[PATCH] Fix RCU race in access of nohz_cpu_mask

2005-12-12 08:57:42 -08:00

rcutorture.c

[PATCH] Fix bug in RCU torture test

2005-12-12 08:57:42 -08:00

resource.c

[PATCH] introduce and use kzalloc

2005-09-07 16:57:45 -07:00

sched.c

[PATCH] m68k: introduce setup_thread_stack() and end_of_stack()

2005-11-13 18:14:13 -08:00

seccomp.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

signal.c

[PATCH] signal handling: revert sigkill priority fix

2005-11-13 18:14:15 -08:00

softirq.c

[PATCH] cpu hoptlug: avoid usage of smp_processor_id() in preemptible code

2005-11-07 07:53:29 -08:00

softlockup.c

[PATCH] quieten softlockup at boot

2005-11-09 07:55:50 -08:00

spinlock.c

[PATCH] spinlock consolidation

2005-09-10 10:06:21 -07:00

stop_machine.c

[PATCH] stop_machine() vs. synchronous IPI send deadlock

2005-11-13 18:14:16 -08:00

sys_ni.c

[PATCH] remove sys_set_zone_reclaim()

2005-08-01 10:03:56 -07:00

sys.c

[SPARC64]: Re-export uts_sem for solaris compat module.

2005-11-10 12:47:50 -08:00

sysctl.c

[PATCH] Fix sysctl unregistration oops (CVE-2005-2709)

2005-11-08 17:57:30 -08:00

time.c

[PATCH] NTP shift_right cleanup

2005-10-30 17:37:18 -08:00

timer.c

[PATCH] jiffies_64 cleanup

2005-10-30 17:37:25 -08:00

uid16.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

user.c

[PATCH] inotify

2005-07-12 20:38:38 -07:00

wait.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

workqueue.c

[PATCH] Fix hardcoded cpu=0 in workqueue for per_cpu_ptr() calls

2005-11-28 14:42:23 -08:00