Peter Williams 0a565f7919 [PATCH] sched: fix bug in __migrate_task() ... Problem: In the function __migrate_task(), deactivate_task() followed by activate_task() is used to move the task from one run queue to another. This has two undesirable effects: 1. The task's priority is recalculated. (Nowhere else in the scheduler code is the priority recalculated for a change of CPU.) 2. The task's time stamp is set to the current time. At the very least, this makes the adjustment of the time stamp before the call to deactivate_task() redundant but I believe the problem is more serious as the time stamp now holds the time of the queue change instead of the time at which the task was woken. In addition, unless dest_rq is the same queue as "current" is on the time stamp could be inaccurate due to inter CPU drift. Solution: Replace the call to activate_task() with one to __activate_task(). Signed-off-by: Peter Williams <pwil3058@bigpond.net.au> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-07-10 13:24:13 -07:00
..
irq	Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc	2006-07-03 15:28:34 -07:00
power	remove obsolete swsusp_encrypt	2006-06-30 18:59:59 +02:00
time	[PATCH] time: rename clocksource functions	2006-06-26 09:58:21 -07:00
.gitignore	gitignore: ignore more generated files	2006-01-03 11:35:26 +01:00
acct.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
audit.c	[NETLINK]: Encapsulate eff_cap usage within security framework.	2006-06-29 16:57:55 -07:00
audit.h	[PATCH] add rule filterkey	2006-07-01 05:43:06 -04:00
auditfilter.c	[PATCH] audit syscall classes	2006-07-01 07:44:10 -04:00
auditsc.c	[PATCH] audit: support for object context filters	2006-07-01 05:44:19 -04:00
capability.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
compat.c	[PATCH] N32 sigset and __COMPAT_ENDIAN_SWAP__	2006-06-25 10:01:15 -07:00
configs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
cpu.c	[PATCH] cpu hotplug: make [un]register_cpu_notifier init time only	2006-06-27 17:32:41 -07:00
cpuset.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
dma.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
exec_domain.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
exit.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
extable.c	[PATCH] symbol_put_addr() locks kernel	2006-05-15 11:20:55 -07:00
fork.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
futex_compat.c	[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support	2006-06-27 17:32:47 -07:00
futex.c	[PATCH] lockdep: annotate futex	2006-07-03 15:27:06 -07:00
hrtimer.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
itimer.c	[PATCH] hrtimers: remove data field	2006-03-26 08:57:03 -08:00
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	[POWERPC] Add the use of the firmware soft-reset-nmi to kdump.	2006-06-28 15:18:52 +10:00
kfifo.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
kmod.c	[PATCH] lockdep: annotate on-stack completions	2006-07-03 15:27:09 -07:00
kprobes.c	[PATCH] Notify page fault call chain	2006-06-26 09:58:22 -07:00
ksysfs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
kthread.c	[PATCH] kthread: move kernel-doc and put it into DocBook	2006-06-25 10:01:24 -07:00
lockdep_internals.h	[PATCH] lockdep: core	2006-07-03 15:27:03 -07:00
lockdep_proc.c	[PATCH] lockdep: procfs	2006-07-03 15:27:04 -07:00
lockdep.c	[PATCH] lockdep: allow read_lock() recursion of same class	2006-07-03 15:27:04 -07:00
Makefile	[PATCH] lockdep: prove spinlock rwlock locking correctness	2006-07-03 15:27:04 -07:00
module.c	[PATCH] lockdep: core	2006-07-03 15:27:03 -07:00
mutex-debug.c	[PATCH] lockdep: prove mutex locking correctness	2006-07-03 15:27:04 -07:00
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
panic.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
params.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
pid.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
posix-cpu-timers.c	[PATCH] arm_timer: remove a racy and obsolete PF_EXITING check	2006-06-17 10:52:13 -07:00
posix-timers.c	[PATCH] hrtimers: remove data field	2006-03-26 08:57:03 -08:00
printk.c	[PATCH] lockdep: do not recurse in printk	2006-07-03 15:27:05 -07:00
profile.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
ptrace.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
rcupdate.c	[PATCH] lockdep: locking init debugging improvement	2006-07-03 15:27:02 -07:00
rcutorture.c	[PATCH] rcutorture: add call_rcu_bh() operations	2006-06-27 17:32:40 -07:00
relay.c	[PATCH] relay: consolidate sendfile() and read() code	2006-03-23 19:58:45 +01:00
resource.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
rtmutex_common.h	[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support	2006-06-27 17:32:47 -07:00
rtmutex-debug.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
rtmutex-debug.h	[PATCH] lockdep: better lock debugging	2006-07-03 15:27:01 -07:00
rtmutex-tester.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
rtmutex.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -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: fix bug in __migrate_task()	2006-07-10 13:24:13 -07:00
seccomp.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
signal.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial	2006-06-30 15:39:30 -07:00
softirq.c	[PATCH] lockdep: irqtrace subsystem, move account_system_vtime() calls into kernel/softirq.c	2006-07-03 15:27:10 -07:00
softlockup.c	[PATCH] cpu hotplug: revert initdata patch submitted for 2.6.17	2006-06-27 17:32:41 -07:00
spinlock.c	[PATCH] lockdep: prove spinlock rwlock locking correctness	2006-07-03 15:27:04 -07:00
stacktrace.c	[PATCH] lockdep: stacktrace subsystem, core	2006-07-03 15:27:02 -07:00
stop_machine.c	[PATCH] revert "kthread: convert stop_machine into a kthread"	2006-07-03 21:25:20 -07:00
sys_ni.c	[PATCH] sys_move_pages: 32bit support (i386, x86_64)	2006-06-23 07:42:53 -07:00
sys.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
sysctl.c	[PATCH] ZVC/zone_reclaim: Leave 1% of unmapped pagecache pages for file I/O	2006-07-03 15:26:59 -07:00
time.c	[PATCH] Time: Introduce arch generic time accessors	2006-06-26 09:58:20 -07:00
timer.c	[PATCH] sched: cleanup, remove task_t, convert to struct task_struct	2006-07-03 15:27:11 -07:00
uid16.c	[PATCH] Add more prevent_tail_call()	2006-04-19 16:27:18 -07:00
unwind.c	[PATCH] x86_64: allow unwinder to build without module support	2006-06-26 10:48:18 -07:00
user.c	[PATCH] selinux: add hooks for key subsystem	2006-06-22 15:05:55 -07:00
wait.c	[PATCH] lockdep: annotate waitqueues	2006-07-03 15:27:07 -07:00
workqueue.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq	2006-07-04 14:00:26 -07:00