Mike Galbraith 5ce74abe78 [PATCH] sched: fix interactive task starvation ...

Fix a starvation problem that occurs when a stream of highly interactive tasks
delay an array switch for extended periods despite EXPIRED_STARVING(rq) being
true.  AFAIKT, the only choice is to enqueue awakening tasks on the expired
array in this case.

Without this patch, it can be nearly impossible to remotely login to a busy
server, and interactive shell commands can starve for minutes.

Also, convert the EXPIRED_STARVING macro into an inline function which humans
can understand.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-04-11 06:18:30 -07:00

..

irq

[PATCH] warn if free_irq() is called from IRQ context

2006-03-26 08:56:53 -08:00

power

help text: SOFTWARE_SUSPEND doesn't need ACPI

2006-04-01 01:03:08 +02:00

.gitignore

…

acct.c

[PATCH] Fix pacct bug in multithreading case.

2006-03-31 12:18:54 -08:00

audit.c

[PATCH] Don't pass boot parameters to argv_init[]

2006-03-31 12:18:53 -08:00

audit.h

[PATCH] sem2mutex: audit_netlink_sem

2006-03-20 14:08:55 -05:00

auditfilter.c

[PATCH] sem2mutex: audit_netlink_sem

2006-03-20 14:08:55 -05:00

auditsc.c

Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current

2006-03-25 09:24:53 -08:00

capability.c

[PATCH] refactor capable() to one implementation, add __capable() helper

2006-03-25 08:22:56 -08:00

compat.c

[PATCH] lightweight robust futexes: compat

2006-03-27 08:44:49 -08:00

configs.c

…

cpu.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

cpuset.c

[PATCH] cpuset: memory migration interaction fix

2006-03-31 12:18:55 -08:00

dma.c

…

exec_domain.c

[PATCH] Fix module refcount leak in __set_personality()

2006-03-24 07:33:30 -08:00

exit.c

[PATCH] task: RCU protect task->usage

2006-03-31 12:18:59 -08:00

extable.c

…

fork.c

[PATCH] wrong error path in dup_fd() leading to oopses in RCU

2006-03-31 12:25:46 -08:00

futex_compat.c

[PATCH] futex: check and validate timevals

2006-03-31 12:18:59 -08:00

futex.c

[PATCH] futex: check and validate timevals

2006-03-31 12:18:59 -08:00

hrtimer.c

[PATCH] hrtimer: call get_softirq_time() only when necessary in run_hrtimer_queue()

2006-03-31 12:18:58 -08:00

intermodule.c

…

itimer.c

[PATCH] hrtimers: remove data field

2006-03-26 08:57:03 -08:00

kallsyms.c

…

Kconfig.hz

…

Kconfig.preempt

…

kexec.c

…

kfifo.c

…

kmod.c

[PATCH] wait_for_helper: trivial style cleanup

2006-03-28 18:36:41 -08:00

kprobes.c

[PATCH] kretprobe instance recycled by parent process

2006-03-26 08:57:04 -08:00

ksysfs.c

[PATCH] fix build error if CONFIG_SYSFS=n

2006-03-24 07:33:31 -08:00

kthread.c

[PATCH] find_task_by_pid() needs tasklist_lock

2006-03-25 08:22:57 -08:00

Makefile

[PATCH] lightweight robust futexes: compat

2006-03-27 08:44:49 -08:00

module.c

[PATCH] modules: permit Dual-MIT/GPL licenses

2006-03-31 12:18:56 -08:00

mutex-debug.c

…

mutex-debug.h

…

mutex.c

…

mutex.h

…

panic.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

params.c

[PATCH] Change dash2underscore() return value to char

2006-03-28 09:16:03 -08:00

pid.c

[PATCH] pidhash: Refactor the pid hash table

2006-03-31 12:19:00 -08:00

posix-cpu-timers.c

…

posix-timers.c

[PATCH] hrtimers: remove data field

2006-03-26 08:57:03 -08:00

printk.c

BUG_ON() Conversion in kernel/printk.c

2006-04-01 01:21:17 +02:00

profile.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

ptrace.c

BUG_ON() Conversion in kernel/ptrace.c

2006-04-02 13:43:40 +02:00

rcupdate.c

[PATCH] rcu_process_callbacks: don't cli() while testing ->nxtlist

2006-03-24 07:33:20 -08:00

rcutorture.c

[PATCH] for_each_possible_cpu: fixes for generic part

2006-03-28 09:16:05 -08:00

relay.c

[PATCH] relay: consolidate sendfile() and read() code

2006-03-23 19:58:45 +01:00

resource.c

…

sched.c

[PATCH] sched: fix interactive task starvation

2006-04-11 06:18:30 -07:00

seccomp.c

…

signal.c

BUG_ON() Conversion in kernel/signal.c

2006-04-02 13:44:47 +02:00

softirq.c

[PATCH] on_each_cpu(): disable local interrupts

2006-03-22 07:53:59 -08:00

softlockup.c

[PATCH] Notifier chain update: API changes

2006-03-27 08:44:50 -08:00

spinlock.c

[PATCH] BUILD_LOCK_OPS: cleanup preempt_disable() usage

2006-03-23 07:38:16 -08:00

stop_machine.c

…

sys_ni.c

[PATCH] lightweight robust futexes: core

2006-03-27 08:44:49 -08:00

sys.c

[PATCH] Make setsid() more robust

2006-03-31 12:18:59 -08:00

sysctl.c

[PATCH] Range checking in do_proc_dointvec_(userhz_)jiffies_conv

2006-03-24 07:33:20 -08:00

time.c

Fix comments: s/granuality/granularity/

2006-04-01 01:41:22 +02:00

timer.c

[PATCH] x86_64: Fix drift with HPET timer enabled

2006-04-09 11:53:53 -07:00

uid16.c

…

user.c

[PATCH] free_uid() locking improvement

2006-03-24 07:33:20 -08:00

wait.c

…

workqueue.c

…