Tejun Heo c8acec90d9 cpuset: consider dying css as offline ... commit 41c25707d2 upstream. In most cases, a cgroup controller don't care about the liftimes of cgroups. For the controller, a css becomes online when ->css_online() is called on it and offline when ->css_offline() is called. However, cpuset is special in that the user interface it exposes cares whether certain cgroups exist or not. Combined with the RCU delay between cgroup removal and css offlining, this can lead to user visible behavior oddities where operations which should succeed after cgroup removals fail for some time period. The effects of cgroup removals are delayed when seen from userland. This patch adds css_is_dying() which tests whether offline is pending and updates is_cpuset_online() so that the function returns false also while offline is pending. This gets rid of the userland visible delays. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Daniel Jordan <daniel.m.jordan@oracle.com> Link: http://lkml.kernel.org/r/327ca1f5-7957-fbb9-9e5f-9ba149d40ba2@oracle.com Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-06-14 13:16:23 +02:00
..
acpi	Merge branch 'acpi-pci'	2015-11-07 01:30:10 +01:00
asm-generic	asm-generic: make copy_from_user() zero the destination properly	2016-09-24 10:07:45 +02:00
clocksource
crypto	crypto: ahash - Fix EINPROGRESS notification callback	2017-04-21 09:30:06 +02:00
drm	drm/ttm, drm/vmwgfx: Relax permission checking when opening surfaces	2017-04-12 12:38:33 +02:00
dt-bindings	ARM: DT updates for v4.4	2015-11-10 15:06:26 -08:00
keys
kvm	KVM: arm/arm64: arch_timer: Preserve physical dist. active state on LR.active	2015-11-24 18:07:40 +01:00
linux	cpuset: consider dying css as offline	2017-06-14 13:16:23 +02:00
math-emu
media	videobuf2-core: Check user space planes array in dqbuf	2016-05-04 14:48:50 -07:00
memory
misc
net	net: ping: do not abuse udp_poll()	2017-06-14 13:16:19 +02:00
pcmcia
ras
rdma	RDMA/core: Fix incorrect structure packing for booleans	2017-03-12 06:37:29 +01:00
rxrpc
scsi	scsi: libiscsi: add lock around task lists to fix list corruption regression	2017-03-26 12:13:19 +02:00
soc	ARM: at91: define LPDDR types	2017-03-12 06:37:24 +01:00
sound	ALSA: rawmidi: Make snd_rawmidi_transmit() race-free	2016-02-17 12:30:58 -08:00
target	target: Convert ACL change queue_depth se_session reference usage	2017-05-20 14:26:58 +02:00
trace	tracing: Add #undef to fix compile error	2017-03-18 19:09:57 +08:00
uapi	net: ipv6: RTF_PCPU should not be settable from userspace	2017-05-02 21:19:53 -07:00
video	drm/imx: Match imx-ipuv3-crtc components using device node in platform data	2016-06-07 18:14:37 -07:00
xen	xen: Fix page <-> pfn conversion on 32 bit systems	2016-05-11 11:21:14 +02:00
Kbuild