Paul Jackson 4c4d50f7b3 [PATCH] cpuset: top_cpuset tracks hotplug changes to cpu_online_map ... Change the list of cpus allowed to tasks in the top (root) cpuset to dynamically track what cpus are online, using a CPU hotplug notifier. Make this top cpus file read-only. On systems that have cpusets configured in their kernel, but that aren't actively using cpusets (for some distros, this covers the majority of systems) all tasks end up in the top cpuset. If that system does support CPU hotplug, then these tasks cannot make use of CPUs that are added after system boot, because the CPUs are not allowed in the top cpuset. This is a surprising regression over earlier kernels that didn't have cpusets enabled. In order to keep the behaviour of cpusets consistent between systems actively making use of them and systems not using them, this patch changes the behaviour of the 'cpus' file in the top (root) cpuset, making it read only, and making it automatically track the value of cpu_online_map. Thus tasks in the top cpuset will have automatic use of hot plugged CPUs allowed by their cpuset. Thanks to Anton Blanchard and Nathan Lynch for reporting this problem, driving the fix, and earlier versions of this patch. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: Nathan Lynch <ntl@pobox.com> Cc: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-08-27 11:01:32 -07:00
..
irq	[PATCH] genirq: {en,dis}able_irq_wake() need refcounting too	2006-07-31 13:28:36 -07:00
power	[PATCH] Make suspend possible with a traced process at a breakpoint	2006-08-06 08:57:45 -07:00
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	[PATCH] Fix sighand->siglock usage in kernel/acct.c	2006-07-14 21:53:54 -07:00
audit.c	[PATCH] fix oops with CONFIG_AUDIT and !CONFIG_AUDITSYSCALL	2006-08-03 10:50:39 -04:00
audit.h	[PATCH] add rule filterkey	2006-07-01 05:43:06 -04:00
auditfilter.c	[PATCH] introduce audit rules counter	2006-08-03 10:55:18 -04:00
auditsc.c	[PATCH] take filling ->pid, etc. out of audit_get_context()	2006-08-03 10:59:51 -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	cpu hotplug: simplify and hopefully fix locking	2006-07-23 12:12:16 -07:00
cpuset.c	[PATCH] cpuset: top_cpuset tracks hotplug changes to cpu_online_map	2006-08-27 11:01:32 -07:00
delayacct.c	[PATCH] delay accounting: temporarily enable by default	2006-07-31 13:28:37 -07:00
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] per-task delay accounting taskstats interface: control exit data through cpumasks	2006-07-14 21:53:57 -07:00
extable.c	[PATCH] symbol_put_addr() locks kernel	2006-05-15 11:20:55 -07:00
fork.c	[PATCH] ptrace: make pid of child process available for PTRACE_EVENT_VFORK_DONE	2006-08-06 08:57:46 -07:00
futex_compat.c	[PATCH] futex: Apply recent futex fixes to futex_compat	2006-08-06 08:57:49 -07:00
futex.c	[PATCH] futex_find_get_task(): remove an obscure EXIT_ZOMBIE check	2006-08-27 11:01:30 -07:00
hrtimer.c	[PATCH] fix hrtimer percpu usage typo	2006-08-14 12:54:28 -07:00
itimer.c	[PATCH] hrtimers: remove data field	2006-03-26 08:57:03 -08:00
kallsyms.c	[PATCH] null-terminate over-long /proc/kallsyms symbols	2006-07-14 21:53:52 -07:00
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] IA64: kprobe invalidate icache of jump buffer	2006-07-31 13:28:38 -07:00
ksysfs.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
kthread.c	[PATCH] remove kernel/kthread.c:kthread_stop_sem()	2006-07-14 21:53:52 -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: core, reduce per-lock class-cache size	2006-07-10 13:24:14 -07:00
Makefile	[PATCH] per-task-delay-accounting: taskstats interface	2006-07-14 21:53:56 -07:00
module.c	[PATCH] null-terminate over-long /proc/kallsyms symbols	2006-07-14 21:53:52 -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	[PATCH] panic.c build fix	2006-08-14 12:54:28 -07:00
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] vt: printk: Fix framebuffer console triggering might_sleep assertion	2006-08-06 08:57:47 -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] cpu hotplug: replace __devinit* with __cpuinit* for cpu notifications	2006-07-31 13:28:39 -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	[PATCH] memory hotadd fixes: find_next_system_ram catch range fix	2006-08-06 08:57:48 -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	[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] Add try_to_freeze() to rt-test kthreads	2006-07-14 21:53:53 -07:00
rtmutex.c	[PATCH] reference rt-mutex-design in rtmutex.c	2006-07-31 13:28:43 -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] revert "Drop tasklist lock in do_sched_setscheduler"	2006-08-27 11:01:29 -07:00
seccomp.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
signal.c	Fix force_sig_info() semantics after cleanups	2006-08-02 20:17:49 -07:00
softirq.c	[PATCH] Reducing local_bh_enable/disable overhead in irqtrace	2006-07-31 13:28:42 -07:00
softlockup.c	[PATCH] cpu hotplug: replace __devinit* with __cpuinit* for cpu notifications	2006-07-31 13:28:39 -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] Remove redundant up() in stop_machine()	2006-08-27 11:01:31 -07:00
sys_ni.c	[PATCH] sys_move_pages: 32bit support (i386, x86_64)	2006-06-23 07:42:53 -07:00
sys.c	[PATCH] Fix prctl privilege escalation and suid_dumpable (CVE-2006-2451)	2006-07-12 12:50:25 -07:00
sysctl.c	[PATCH] ZVC/zone_reclaim: Leave 1% of unmapped pagecache pages for file I/O	2006-07-03 15:26:59 -07:00
taskstats.c	[PATCH] taskstats: free skb, avoid returns in send_cpu_listeners	2006-07-31 13:28:37 -07:00
time.c	[PATCH] Time: Introduce arch generic time accessors	2006-06-26 09:58:20 -07:00
timer.c	[PATCH] sys_getppid oopses on debug kernel	2006-08-14 12:54:29 -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] uninline init_waitqueue_head()	2006-07-10 13:24:25 -07:00
workqueue.c	[PATCH] workqueue: remove lock_cpu_hotplug()	2006-08-14 12:54:29 -07:00