Zachary Amsden 3908fd2ed9 [PATCH] softirq: remove BUG_ONs which can incorrectly trigger ... It is possible to have tasklets get scheduled before softirqd has had a chance to spawn on all CPUs. This is totally harmless; after success during action CPU_UP_PREPARE, action CPU_ONLINE will be called, which immediately wakes softirqd on the appropriate CPU to process the already pending tasklets. So there is no danger of having a missed wakeup for any tasklets that were already pending. In particular, i386 is affected by this during startup, and is visible when using a very large initrd; during the time it takes for the initrd to be decompressed, a timer IRQ can come in and schedule RCU callbacks. It is also possible that resending of a hardware IRQ via a softirq triggers the same bug. Because of different timing conditions, this shows up in all emulators and virtual machines tested, including Xen, VMware, Virtual PC, and Qemu. It is also possible to trigger on native hardware with a large enough initrd, although I don't have a reliable case demonstrating that. Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: <caglar@pardus.org.tr> Cc: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-12-07 08:39:43 -08:00
..
irq	[PATCH] lockdep: name some old style locks	2006-12-07 08:39:36 -08:00
power	[PATCH] Export pm_suspend for the shared APM emulation	2006-12-07 08:39:32 -08:00
time	[PATCH] time_adjust cleared before use	2006-10-28 11:30:55 -07:00
.gitignore	gitignore: ignore more generated files	2006-01-03 11:35:26 +01:00
acct.c	[PATCH] lockdep: name some old style locks	2006-12-07 08:39:36 -08:00
audit.c	[PATCH] Add include/linux/freezer.h and move definitions from sched.h	2006-12-07 08:39:27 -08:00
audit.h	[PATCH] audit: AUDIT_PERM support	2006-09-11 13:32:30 -04:00
auditfilter.c	[PATCH] kernel core: replace kmalloc+memset with kzalloc	2006-12-07 08:39:41 -08:00
auditsc.c	[PATCH] severing skbuff.h -> highmem.h	2006-12-04 02:00:29 -05:00
capability.c	[PATCH] pidspace: is_init()	2006-09-29 09:18:12 -07:00
compat.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
configs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
cpu.c	[PATCH] suspend: don't change cpus_allowed for task initiating the suspend	2006-12-07 08:39:28 -08:00
cpuset.c	[PATCH] hotplug CPU: clean up hotcpu_notifier() use	2006-12-07 08:39:39 -08:00
delayacct.c	[PATCH] slab: remove kmem_cache_t	2006-12-07 08:39:25 -08:00
dma.c	[PATCH] kernel-doc for kernel/dma.c	2006-10-03 08:03:41 -07:00
exec_domain.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
exit.c	[PATCH] taskstats: cleanup do_exit() path	2006-12-07 08:39:34 -08:00
extable.c	[PATCH] symbol_put_addr() locks kernel	2006-05-15 11:20:55 -07:00
fork.c	[PATCH] taskstats: cleanup ->signal->stats allocation	2006-12-07 08:39:34 -08:00
futex_compat.c	[PATCH] __user annotations: futex	2006-10-10 15:37:22 -07:00
futex.c	[PATCH] futex: init error check	2006-12-07 08:39:41 -08:00
hrtimer.c	[PATCH] posix-timers: Fix clock_nanosleep() doesn't return the remaining time in compatibility mode	2006-09-29 09:18:15 -07:00
itimer.c	[PATCH] hrtimers: remove data field	2006-03-26 08:57:03 -08:00
kallsyms.c	[PATCH] /proc/kallsyms reports lower-case types for some non-exported symbols	2006-12-07 08:39:31 -08:00
Kconfig.hz	[PATCH] HZ: 300Hz support	2006-12-07 08:39:36 -08:00
Kconfig.preempt	[PATCH] sched: voluntary kernel preemption	2005-06-25 16:24:45 -07:00
kexec.c	[PATCH] kernel core: replace kmalloc+memset with kzalloc	2006-12-07 08:39:41 -08:00
kfifo.c	[PATCH] memory ordering in __kfifo primitives	2006-09-29 09:18:13 -07:00
kmod.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2006-12-05 14:37:56 +00:00
kprobes.c	[PATCH] kprobes: enable booster on the preemptible kernel	2006-12-07 08:39:38 -08:00
ksysfs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
kthread.c	WorkStruct: Pass the work_struct pointer instead of context data	2006-11-22 14:55:48 +00:00
latency.c	[PATCH] severing module.h->sched.h	2006-12-04 02:00:22 -05:00
lockdep_internals.h	[PATCH] lockdep: more chains	2006-12-07 08:39:43 -08:00
lockdep_proc.c	[PATCH] lockdep: procfs	2006-07-03 15:27:04 -07:00
lockdep.c	[PATCH] remove kernel/lockdep.c:lockdep_internal	2006-12-07 08:39:39 -08:00
Makefile	[PATCH] srcu-3: RCU variant permitting read-side blocking	2006-10-04 07:55:30 -07:00
module.c	[PATCH] severing module.h->sched.h	2006-12-04 02:00:22 -05:00
mutex-debug.c	[PATCH] lockdep: show more details about self-test failures	2006-12-07 08:39:43 -08:00
mutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
mutex.c	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
mutex.h	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
nsproxy.c	[PATCH] kernel/nsproxy.c: use kmemdup()	2006-10-20 10:26:44 -07:00
panic.c	[PATCH] x86: Clean up x86 NMI sysctls	2006-09-30 01:47:55 +02:00
params.c	[PATCH] module_subsys: initialize earlier	2006-09-29 09:18:08 -07:00
pid.c	[PATCH] slab: remove kmem_cache_t	2006-12-07 08:39:25 -08:00
posix-cpu-timers.c	[PATCH] posix-cpu-timers: prevent signal delivery starvation	2006-10-17 08:18:43 -07:00
posix-timers.c	[PATCH] slab: remove kmem_cache_t	2006-12-07 08:39:25 -08:00
printk.c	[PATCH] remove the syslog interface when printk is disabled	2006-12-07 08:39:38 -08:00
profile.c	[PATCH] hotplug CPU: clean up hotcpu_notifier() use	2006-12-07 08:39:39 -08:00
ptrace.c	[PATCH] pidspace: is_init()	2006-09-29 09:18:12 -07:00
rcupdate.c	[PATCH] rcu: add a prefetch() in rcu_do_batch()	2006-12-07 08:39:40 -08:00
rcutorture.c	[PATCH] rcu: add sched torture type to rcutorture	2006-10-04 07:55:31 -07:00
relay.c	WorkStruct: make allyesconfig	2006-11-22 14:57:56 +00:00
resource.c	[PATCH] kernel-doc for kernel/resource.c	2006-10-03 08:03:41 -07:00
rtmutex_common.h	[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support	2006-06-27 17:32:47 -07:00
rtmutex-debug.c	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
rtmutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rtmutex-tester.c	[PATCH] Add include/linux/freezer.h and move definitions from sched.h	2006-12-07 08:39:27 -08:00
rtmutex.c	[PATCH] clean up and remove some extra spinlocks from rtmutex	2006-09-29 09:18:09 -07:00
rtmutex.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rwsem.c	[PATCH] lockdep: prove rwsem locking correctness	2006-07-03 15:27:04 -07:00
sched.c	[PATCH] sched: correct output of show_state()	2006-12-07 08:39:42 -08:00
seccomp.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
signal.c	[PATCH] make kernel/signal.c:kill_proc_info() static	2006-12-07 08:39:39 -08:00
softirq.c	[PATCH] softirq: remove BUG_ONs which can incorrectly trigger	2006-12-07 08:39:43 -08:00
softlockup.c	[PATCH] check return value of cpu_callback	2006-09-29 09:18:14 -07:00
spinlock.c	[PATCH] lockdep: spin_lock_irqsave_nested()	2006-11-25 13:28:34 -08:00
srcu.c	[PATCH] SRCU: report out-of-memory errors	2006-10-04 07:55:30 -07:00
stacktrace.c	[PATCH] lockdep: stacktrace subsystem, core	2006-07-03 15:27:02 -07:00
stop_machine.c	[PATCH] stop_machine.c copyright	2006-09-29 09:18:24 -07:00
sys_ni.c	[PATCH] Create compat_sys_migrate_pages	2006-11-03 12:27:59 -08:00
sys.c	WorkStruct: Pass the work_struct pointer instead of context data	2006-11-22 14:55:48 +00:00
sysctl.c	[PATCH] sysctl: string length calculated is wrong if it contains negative numbers	2006-12-07 08:39:42 -08:00
taskstats.c	[PATCH] taskstats: cleanup reply assembling	2006-12-07 08:39:34 -08:00
time.c	[PATCH] NTP: Move all the NTP related code to ntp.c	2006-10-01 00:39:26 -07:00
timer.c	[PATCH] kill wall_jiffies	2006-10-01 00:39:27 -07:00
tsacct.c	[PATCH] xacct_add_tsk: fix pure theoretical ->mm use-after-free	2006-10-30 12:08:41 -08:00
uid16.c	[PATCH] Add more prevent_tail_call()	2006-04-19 16:27:18 -07:00
unwind.c	[PATCH] x86-64: work around gcc4 issue with -Os in Dwarf2 stack unwind	2006-11-28 20:12:59 +01:00
user.c	[PATCH] slab: remove kmem_cache_t	2006-12-07 08:39:25 -08:00
utsname.c	[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag	2006-10-02 07:57:22 -07:00
wait.c	[PATCH] uninline init_waitqueue_head()	2006-07-10 13:24:25 -07:00
workqueue.c	[PATCH] hotplug CPU: clean up hotcpu_notifier() use	2006-12-07 08:39:39 -08:00