Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Ben Blum aae8aab403 cgroups: revamp subsys array ... This patch series provides the ability for cgroup subsystems to be compiled as modules both within and outside the kernel tree. This is mainly useful for classifiers and subsystems that hook into components that are already modules. cls_cgroup and blkio-cgroup serve as the example use cases for this feature. It provides an interface cgroup_load_subsys() and cgroup_unload_subsys() which modular subsystems can use to register and depart during runtime. The net_cls classifier subsystem serves as the example for a subsystem which can be converted into a module using these changes. Patch #1 sets up the subsys[] array so its contents can be dynamic as modules appear and (eventually) disappear. Iterations over the array are modified to handle when subsystems are absent, and the dynamic section of the array is protected by cgroup_mutex. Patch #2 implements an interface for modules to load subsystems, called cgroup_load_subsys, similar to cgroup_init_subsys, and adds a module pointer in struct cgroup_subsys. Patch #3 adds a mechanism for unloading modular subsystems, which includes a more advanced rework of the rudimentary reference counting introduced in patch 2. Patch #4 modifies the net_cls subsystem, which already had some module declarations, to be configurable as a module, which also serves as a simple proof-of-concept. Part of implementing patches 2 and 4 involved updating css pointers in each css_set when the module appears or leaves. In doing this, it was discovered that css_sets always remain linked to the dummy cgroup, regardless of whether or not any subsystems are actually bound to it (i.e., not mounted on an actual hierarchy). The subsystem loading and unloading code therefore should keep in mind the special cases where the added subsystem is the only one in the dummy cgroup (and therefore all css_sets need to be linked back into it) and where the removed subsys was the only one in the dummy cgroup (and therefore all css_sets should be unlinked from it) - however, as all css_sets always stay attached to the dummy cgroup anyway, these cases are ignored. Any fix that addresses this issue should also make sure these cases are addressed in the subsystem loading and unloading code. This patch: Make subsys[] able to be dynamically populated to support modular subsystems This patch reworks the way the subsys[] array is used so that subsystems can register themselves after boot time, and enables the internals of cgroups to be able to handle when subsystems are not present or may appear/disappear. Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-03-12 15:52:36 -08:00
..
gcov	microblaze: Enable GCOV_PROFILE_ALL	2009-09-21 14:29:21 +02:00
irq	sparseirq: Use radix_tree instead of ptrs array	2010-02-17 17:27:20 -08:00
power	mm/pm: force GFP_NOIO during suspend/hibernation and resume	2010-03-06 11:26:26 -08:00
time	Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-01 08:48:25 -08:00
trace	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2010-03-03 07:34:18 -08:00
.gitignore
acct.c	bsdacct: fix uid/gid misreporting	2009-12-15 08:53:10 -08:00
async.c
audit.c	Audit: send signal info if selinux is disabled	2009-09-24 03:50:26 -04:00
audit.h
audit_tree.c	new helper: iterate_mounts()	2010-03-03 14:07:57 -05:00
audit_watch.c	Audit: reorganize struct audit_watch to save 8 bytes	2009-09-24 03:50:25 -04:00
auditfilter.c
auditsc.c	Lose the first argument of audit_inode_child()	2010-02-08 14:38:36 -05:00
backtracetest.c
bounds.c	kbuild: move bounds.h to include/generated	2009-12-12 13:08:14 +01:00
capability.c	capabilities: Use RCU to protect task lookup in sys_capget	2009-12-10 09:42:48 +11:00
cgroup.c	cgroups: revamp subsys array	2010-03-12 15:52:36 -08:00
cgroup_freezer.c	cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time	2009-09-24 07:20:58 -07:00
compat.c
configs.c
cpu.c	kernel/cpu.c: delete deprecated definition in cpu_up()	2010-03-06 11:26:28 -08:00
cpuset.c	sched: Fix balance vs hotplug race	2009-12-06 21:10:56 +01:00
cred-internals.h
cred.c	kernel/cred.c: use kmem_cache_free	2010-02-03 10:21:57 +11:00
delayacct.c	headers: taskstats_kern.h trim	2009-09-18 09:48:52 -07:00
dma.c
early_res.c	early_res: Need to save the allocation name in drop_range_partial()	2010-03-01 23:23:02 -08:00
elfcore.c	elf coredump: add extended numbering support	2010-03-06 11:26:46 -08:00
exec_domain.c
exit.c	kernel/exit.c: fix shadows sparse warning	2010-03-06 11:26:32 -08:00
extable.c
fork.c	kernel core: use helpers for rlimits	2010-03-06 11:26:33 -08:00
freezer.c
futex.c	futex: Handle futex value corruption gracefully	2010-02-03 15:13:22 +01:00
futex_compat.c	futex: Protect pid lookup in compat code with RCU	2009-12-09 14:22:14 +01:00
groups.c
hrtimer.c	hrtimers: Convert to raw_spinlocks	2009-12-14 23:55:34 +01:00
hung_task.c	softlockup: Fix hung_task_check_count sysctl	2009-11-27 06:21:57 +01:00
hw_breakpoint.c	perf: Make bp_len type to u64 generic across the arch	2010-02-04 01:07:12 +01:00
itimer.c	itimers: Fix racy writes to cpu_itimer fields	2009-11-18 16:32:12 +01:00
kallsyms.c	hw-breakpoints: Fix broken hw-breakpoint sample module	2009-11-10 11:23:29 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks	mutex: Better control mutex adaptive spinning config	2009-12-03 11:50:11 +01:00
Kconfig.preempt
kexec.c	percpu: add __percpu sparse annotations to core kernel subsystems	2010-02-17 11:17:38 +09:00
kfifo.c	kfifo: Don't use integer as NULL pointer	2010-02-16 15:11:08 -08:00
kgdb.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-02-04 16:07:41 -08:00
kmod.c	kmod: fix resource leak in call_usermodehelper_pipe()	2010-01-11 09:34:04 -08:00
kprobes.c	kprobes: Jump optimization sysctl interface	2010-02-25 17:49:25 +01:00
ksysfs.c	sched: Remove USER_SCHED	2010-01-21 13:40:18 +01:00
kthread.c	kthread, sched: Remove reference to kthread_create_on_cpu	2010-02-09 11:47:39 +01:00
latencytop.c
lockdep.c	rcu: Make lockdep_rcu_dereference() message less alarmist	2010-02-26 08:20:46 +01:00
lockdep_internals.h
lockdep_proc.c	seq_file: constify seq_operations	2009-09-23 07:39:29 -07:00
lockdep_states.h
Makefile	elf coredump: replace ELF_CORE_EXTRA_* macros by functions	2010-03-06 11:26:45 -08:00
module.c	sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on module dynamic attributes	2010-03-07 17:04:51 -08:00
mutex-debug.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
mutex-debug.h	locking: Implement new raw_spinlock	2009-12-14 23:55:32 +01:00
mutex.c	mutex: Better control mutex adaptive spinning config	2009-12-03 11:50:11 +01:00
mutex.h
notifier.c	sched: Use lockdep-based checking on rcu_dereference()	2010-02-25 10:34:26 +01:00
ns_cgroup.c	cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time	2009-09-24 07:20:58 -07:00
nsproxy.c
padata.c	padata: Allocate the cpumask for the padata instance	2010-03-04 13:30:22 +08:00
panic.c	panic: fix panic_timeout accuracy when running on a hypervisor	2010-03-06 11:26:33 -08:00
params.c	sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on dynamic attributes	2010-03-07 17:04:51 -08:00
perf_event.c	sysdev: Pass attribute in sysdev_class attributes show/store	2010-03-07 17:04:47 -08:00
pid.c	kernel/pid.c: update comment on find_task_by_pid_ns	2010-03-06 11:26:33 -08:00
pid_namespace.c	pidns: deny CLONE_PARENT|CLONE_NEWPID combination	2009-09-24 07:21:04 -07:00
pm_qos_params.c	pm_qos: clean up racy global "name" variable	2009-10-14 15:31:10 +02:00
posix-cpu-timers.c	kernel core: use helpers for rlimits	2010-03-06 11:26:33 -08:00
posix-timers.c	posix-timers.c: Don't export local functions	2010-02-05 14:54:10 +01:00
printk.c	printk: avoid warning when CONFIG_PRINTK is disabled	2010-03-06 11:26:33 -08:00
profile.c	kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file	2009-09-20 20:15:40 +02:00
ptrace.c	ptrace: Fix ptrace_regset() comments and diagnose errors specifically	2010-02-23 13:45:26 -08:00
range.c	x86: Change range end to start+size	2010-02-10 17:47:17 -08:00
rcupdate.c	rcu: Export rcu_scheduler_active	2010-02-26 08:20:46 +01:00
rcutiny.c	rcu: Eliminate unneeded function wrapping	2009-11-22 18:58:16 +01:00
rcutorture.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2010-03-03 07:34:18 -08:00
rcutree.c	rcu: Fix accelerated grace periods for last non-dynticked CPU	2010-02-27 09:53:52 +01:00
rcutree.h	rcu: Fix accelerated grace periods for last non-dynticked CPU	2010-02-27 09:53:52 +01:00
rcutree_plugin.h	rcu: Fix accelerated GPs for last non-dynticked CPU	2010-02-27 09:53:53 +01:00
rcutree_trace.c	rcu: Stop overflowing signed integers	2010-02-25 10:34:57 +01:00
relay.c	splice: comparing unsigned int < 0	2010-03-06 11:26:32 -08:00
res_counter.c	memcg: some modification to softlimit under hierarchical memory reclaim.	2009-10-01 16:11:13 -07:00
resource.c	Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-03 09:11:02 -08:00
rtmutex-debug.c	sched: Convert pi_lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c	rtmutes: Convert rtmutex.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	sysdev: Pass attribute in sysdev_class attributes show/store	2010-03-07 17:04:47 -08:00
sched_clock.c	sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK	2009-12-15 09:04:36 +01:00
sched_cpupri.c	bitops: rename for_each_bit() to for_each_set_bit()	2010-03-06 11:26:23 -08:00
sched_cpupri.h	sched: Convert cpupri lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_debug.c	sched: Convert rq->lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_fair.c	sched: Fix SCHED_MC regression caused by change in sched cpu_power	2010-02-26 15:45:13 +01:00
sched_features.h	sched: Discard some old bits	2009-12-09 10:03:07 +01:00
sched_idletask.c	sched: Remove the sched_class load_balance methods	2010-01-21 13:40:09 +01:00
sched_rt.c	kernel core: use helpers for rlimits	2010-03-06 11:26:33 -08:00
sched_stats.h
seccomp.c
semaphore.c
signal.c	kernel core: use helpers for rlimits	2010-03-06 11:26:33 -08:00
slow-work-debugfs.c	SLOW_WORK: Move slow_work's proc file to debugfs	2009-12-01 08:20:31 -08:00
slow-work.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6	2009-12-08 07:38:50 -08:00
slow-work.h	SLOW_WORK: Move slow_work's proc file to debugfs	2009-12-01 08:20:31 -08:00
smp.c	generic-ipi: Optimize accesses by using DEFINE_PER_CPU_SHARED_ALIGNED for IPI data	2010-01-18 09:02:59 +01:00
softirq.c	hrtimer, softirq: Fix hrtimer->softirq trampoline	2010-02-03 18:17:40 +01:00
softlockup.c	softlockup: Add sched_clock_tick() to avoid kernel warning on kgdb resume	2010-02-01 08:22:32 +01:00
spinlock.c	locking: Cleanup the name space completely	2009-12-14 23:55:33 +01:00
srcu.c	rcu: Introduce lockdep-based checking to RCU read-side primitives	2010-02-25 09:40:59 +01:00
stacktrace.c
stop_machine.c	percpu: add __percpu sparse annotations to core kernel subsystems	2010-02-17 11:17:38 +09:00
sys.c	Add generic sys_olduname()	2010-03-12 15:52:32 -08:00
sys_ni.c	Add generic sys_ipc wrapper	2010-03-12 15:52:32 -08:00
sysctl.c	Merge branch 'perf-probes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-05 10:50:22 -08:00
sysctl_binary.c	Switch may_open() and break_lease() to passing O_...	2010-03-03 13:00:21 -05:00
sysctl_check.c	ipv4 05/05: add sysctl to accept packets with local source addresses	2009-12-03 12:14:38 -08:00
taskstats.c	const: struct nla_policy	2010-02-18 14:30:18 -08:00
test_kprobes.c
time.c	Revert "time: Remove xtime_cache"	2009-12-22 14:10:37 -08:00
timeconst.pl
timer.c	perf: Fix perf_event_do_pending() fallback callsite	2010-01-21 13:40:39 +01:00
tracepoint.c	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
tsacct.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
uid16.c	headers: utsname.h redux	2009-09-23 18:13:10 -07:00
up.c
user-return-notifier.c	core: Clean up user return notifers use of per_cpu	2009-12-02 10:22:59 +01:00
user.c	sched: Remove USER_SCHED	2010-01-21 13:40:18 +01:00
user_namespace.c
utsname.c
utsname_sysctl.c	sysctl kernel: Remove binary sysctl logic	2009-11-12 02:04:55 -08:00
wait.c	locking, sched: Give waitqueue spinlocks their own lockdep classes	2009-08-10 14:43:09 +02:00
workqueue.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2009-12-10 09:35:44 -08:00