Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Tejun Heo 4bac00d16a cgroup: load and release pidlists from seq_file start and stop respectively ... Currently, pidlists are reference counted from file open and release methods. This means that holding onto an open file may waste memory and reads may return data which is very stale. Both aren't critical because pidlists are keyed and shared per namespace and, well, the user isn't supposed to have large delay between open and reads. cgroup is planned to be converted to use kernfs and it'd be best if we can stick to just the seq_file operations - start, next, stop and show. This can be achieved by loading pidlist on demand from start and release with time delay from stop, so that consecutive reads don't end up reloading the pidlist on each iteration. This would remove the need for hooking into open and release while also avoiding issues with holding onto pidlist for too long. The previous patches implemented delayed release and restructured pidlist handling so that pidlists can be loaded and released from seq_file start / stop. This patch actually moves pidlist load to start and release to stop. This means that pidlist is pinned only between start and stop and may go away between two consecutive read calls if the two calls are apart by more than CGROUP_PIDLIST_DESTROY_DELAY. cgroup_pidlist_start() thus can't re-use the stored cgroup_pid_list_open_file->pidlist directly. During start, it's only used as a hint indicating whether this is the first start after open or not and pidlist is always looked up or created. pidlist_mutex locking and reference counting are moved out of pidlist_array_load() so that pidlist_array_load() can perform lookup and creation atomically. While this enlarges the area covered by pidlist_mutex, given how the lock is used, it's highly unlikely to be noticeable. v2: Refreshed on top of the updated "cgroup: introduce struct cgroup_pidlist_open_file". Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com>		2013-11-29 10:42:59 -05:00
..
cpu	sched: Add NEED_RESCHED to the preempt_count	2013-09-25 14:07:49 +02:00
debug	kdb: Add support for external NMI handler to call KGDB/KDB	2013-10-03 18:47:54 +02:00
events	list: introduce list_next_entry() and list_prev_entry()	2013-11-13 12:09:23 +09:00
gcov	gcov: reuse kbasename helper	2013-11-13 12:09:34 +09:00
irq	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-19 10:40:00 -08:00
locking	locking/lockdep: Mark __lockdep_count_forward_deps() as static	2013-11-13 13:50:17 +01:00
power	Merge branch 'pm-sleep'	2013-11-19 01:07:08 +01:00
printk	printk.c: comments should refer to /proc/vmcore instead of /proc/vmcoreinfo	2013-11-13 12:09:14 +09:00
rcu	This batch of changes is mostly clean ups and small bug fixes.	2013-11-16 12:23:18 -08:00
sched	sched/fair: Avoid integer overflow	2013-11-13 13:33:55 +01:00
time	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-12 10:36:00 +09:00
trace	This batch of changes is mostly clean ups and small bug fixes.	2013-11-16 12:23:18 -08:00
.gitignore
acct.c
async.c
audit.c	Merge git://git.infradead.org/users/eparis/audit	2013-11-21 19:18:14 -08:00
audit.h	audit: call audit_bprm() only once to add AUDIT_EXECVE information	2013-11-05 11:15:03 -05:00
audit_tree.c
audit_watch.c
auditfilter.c	audit: do not reject all AUDIT_INODE filter types	2013-11-05 11:09:16 -05:00
auditsc.c	audit: fix type of sessionid in audit_set_loginuid()	2013-11-06 11:47:24 -05:00
backtracetest.c
bounds.c	kernel/bounds: avoid circular dependencies in generated headers	2013-11-19 14:20:12 -08:00
capability.c	xfs: update for v3.12-rc1	2013-09-09 11:19:09 -07:00
cgroup.c	cgroup: load and release pidlists from seq_file start and stop respectively	2013-11-29 10:42:59 -05:00
cgroup_freezer.c	cgroup: make css_for_each_descendant() and friends include the origin css in the iteration	2013-08-08 20:11:27 -04:00
compat.c
configs.c
context_tracking.c	Linux 3.12-rc4	2013-10-09 12:36:13 +02:00
cpu.c	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-14 16:55:11 +09:00
cpu_pm.c
cpuset.c	cpuset: Fix memory allocator deadlock	2013-11-27 13:52:47 -05:00
crash_dump.c
cred.c
delayacct.c	kernel/delayacct.c: remove redundant checking in __delayacct_add_tsk()	2013-11-13 12:09:12 +09:00
dma.c
elfcore.c	switch elf_core_write_extra_phdrs() to dump_emit()	2013-11-09 00:16:23 -05:00
exec_domain.c
exit.c	ptrace: revert "Prepare to fix racy accesses on task breakpoints"	2013-07-09 10:33:26 -07:00
extable.c	extable: skip sorting if the table is empty	2013-09-11 15:58:25 -07:00
fork.c	mm: implement split page table lock for PMD level	2013-11-15 09:32:15 +09:00
freezer.c	freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes	2013-07-30 14:05:06 +02:00
futex.c	locking: Move the rtmutex code to kernel/locking/	2013-11-06 09:23:59 +01:00
futex_compat.c
groups.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
hrtimer.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
hung_task.c	Here are the 3.13 KVM changes. There was a lot of work on the PPC	2013-11-15 13:51:36 +09:00
irq_work.c
itimer.c
jump_label.c	static_key: WARN on usage before jump_label_init was called	2013-10-19 19:45:35 -04:00
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz	kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS	2013-11-15 09:32:22 +09:00
Kconfig.locks
Kconfig.preempt
kexec.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-11-15 16:47:22 -08:00
kmod.c	kernel/kmod.c: check for NULL in call_usermodehelper_exec()	2013-09-30 14:31:02 -07:00
kprobes.c	kprobes: use KSYM_NAME_LEN to size identifier buffers	2013-11-13 12:09:26 +09:00
ksysfs.c	kernel: replace strict_strto*() with kstrto*()	2013-09-12 15:38:03 -07:00
kthread.c	kthread: make kthread_create() killable	2013-11-13 12:08:59 +09:00
latencytop.c
Makefile	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2013-11-21 19:46:00 -08:00
module-internal.h	KEYS: Separate the kernel signature checking keyring from module signing	2013-09-25 17:17:01 +01:00
module.c	Mainly boring here, too. rmmod --wait finally removed, though.	2013-11-15 13:27:50 +09:00
module_signing.c	keys: change asymmetric keys to use common hash definitions	2013-10-25 17:15:18 -04:00
notifier.c
nsproxy.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2013-09-07 14:35:32 -07:00
padata.c	padata - Register hotcpu notifier after initialization	2013-08-29 14:37:59 +10:00
panic.c	kernel/panic.c: reduce 1 byte usage for print tainted buffer	2013-11-13 12:09:35 +09:00
params.c	kernel/params: fix handling of signed integer types	2013-09-28 12:35:52 -07:00
pid.c	pidns: fix free_pid() to handle the first fork failure	2013-09-30 14:31:03 -07:00
pid_namespace.c	pid_namespace: make freeing struct pid_namespace rcu-delayed	2013-10-24 23:43:29 -04:00
posix-cpu-timers.c
posix-timers.c
profile.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
ptrace.c	exec/ptrace: fix get_dumpable() incorrect tests	2013-11-13 12:09:33 +09:00
range.c
reboot.c	kernel/reboot.c: re-enable the function of variable reboot_default	2013-09-24 17:00:26 -07:00
relay.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
res_counter.c	memcg: reduce function dereference	2013-09-12 15:38:02 -07:00
resource.c	kernel/resource.c: remove the unneeded assignment in function __find_resource	2013-07-03 16:08:06 -07:00
seccomp.c
signal.c	constify copy_siginfo_to_user{,32}()	2013-11-09 00:16:29 -05:00
smp.c	kernel: fix generic_exec_single indentation	2013-11-15 09:32:22 +09:00
smpboot.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
smpboot.h
softirq.c	revert "softirq: Add support for triggering softirq work on softirqs"	2013-11-15 09:32:22 +09:00
stacktrace.c
stop_machine.c	stop_machine: Fix race between stop_two_cpus() and stop_cpus()	2013-11-11 12:43:38 +01:00
sys.c	kernel/sys.c: remove obsolete #include <linux/kexec.h>	2013-11-13 12:09:13 +09:00
sys_ni.c
sysctl.c	Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-11-14 16:30:30 +09:00
sysctl_binary.c	kernel/sysctl_binary.c: use scnprintf() instead of snprintf()	2013-11-13 12:09:33 +09:00
system_certificates.S	kernel/system_certificate.S: use real contents instead of macro GLOBAL()	2013-10-30 12:58:00 +00:00
system_keyring.c	KEYS: Make the system 'trusted' keyring viewable by userspace	2013-09-25 17:17:01 +01:00
task_work.c	task_work: documentation	2013-09-11 15:58:27 -07:00
taskstats.c	genetlink: only pass array to genl_register_family_with_ops()	2013-11-19 16:39:05 -05:00
test_kprobes.c
time.c
timeconst.bc
timer.c	sched: Introduce preempt_count accessor functions	2013-09-25 14:07:32 +02:00
tracepoint.c
tsacct.c
uid16.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
up.c	kernel: provide a __smp_call_function_single stub for !CONFIG_SMP	2013-11-15 09:32:22 +09:00
user-return-notifier.c
user.c	KEYS: Add per-user_namespace registers for persistent per-UID kerberos caches	2013-09-24 10:35:19 +01:00
user_namespace.c	KEYS: Add per-user_namespace registers for persistent per-UID kerberos caches	2013-09-24 10:35:19 +01:00
utsname.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
utsname_sysctl.c
watchdog.c	watchdog: update watchdog_thresh properly	2013-09-24 17:00:25 -07:00
workqueue.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-09-06 09:36:28 -07:00
workqueue_internal.h