Frederic Weisbecker 40bea03959 nohz: Restore NMI safe local irq work for local nohz kick ... The local nohz kick is currently used by perf which needs it to be NMI-safe. Recent commit though (7d1311b93e) changed its implementation to fire the local kick using the remote kick API. It was convenient to make the code more generic but the remote kick isn't NMI-safe. As a result: WARNING: CPU: 3 PID: 18062 at kernel/irq_work.c:72 irq_work_queue_on+0x11e/0x140() CPU: 3 PID: 18062 Comm: trinity-subchil Not tainted 3.16.0+ #34 0000000000000009 00000000903774d1 ffff880244e06c00 ffffffff9a7f1e37 0000000000000000 ffff880244e06c38 ffffffff9a0791dd ffff880244fce180 0000000000000003 ffff880244e06d58 ffff880244e06ef8 0000000000000000 Call Trace: <NMI> [<ffffffff9a7f1e37>] dump_stack+0x4e/0x7a [<ffffffff9a0791dd>] warn_slowpath_common+0x7d/0xa0 [<ffffffff9a07930a>] warn_slowpath_null+0x1a/0x20 [<ffffffff9a17ca1e>] irq_work_queue_on+0x11e/0x140 [<ffffffff9a10a2c7>] tick_nohz_full_kick_cpu+0x57/0x90 [<ffffffff9a186cd5>] __perf_event_overflow+0x275/0x350 [<ffffffff9a184f80>] ? perf_event_task_disable+0xa0/0xa0 [<ffffffff9a01a4cf>] ? x86_perf_event_set_period+0xbf/0x150 [<ffffffff9a187934>] perf_event_overflow+0x14/0x20 [<ffffffff9a020386>] intel_pmu_handle_irq+0x206/0x410 [<ffffffff9a0b54d3>] ? arch_vtime_task_switch+0x63/0x130 [<ffffffff9a01937b>] perf_event_nmi_handler+0x2b/0x50 [<ffffffff9a007b72>] nmi_handle+0xd2/0x390 [<ffffffff9a007aa5>] ? nmi_handle+0x5/0x390 [<ffffffff9a0d131b>] ? lock_release+0xab/0x330 [<ffffffff9a008062>] default_do_nmi+0x72/0x1c0 [<ffffffff9a0c925f>] ? cpuacct_account_field+0xcf/0x200 [<ffffffff9a008268>] do_nmi+0xb8/0x100 Lets fix this by restoring the use of local irq work for the nohz local kick. Reported-by: Catalin Iacob <iacobcatalin@gmail.com> Reported-and-tested-by: Dave Jones <davej@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>		2014-09-04 22:35:59 +02:00
..
acpi
asm-generic	This is the bulk of GPIO changes for the v3.17 development	2014-08-08 18:00:35 -07:00
clocksource
crypto
drm	drm/radeon: add additional SI pci ids	2014-08-22 10:47:59 -04:00
dt-bindings	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2014-08-11 07:14:01 -07:00
keys
kvm
linux	nohz: Restore NMI safe local irq work for local nohz kick	2014-09-04 22:35:59 +02:00
math-emu
media
memory
misc
net	tcp: don't allow syn packets without timestamps to pass tcp_tw_recycle logic	2014-08-14 14:38:54 -07:00
pcmcia
ras
rdma	Merge branches 'core', 'cxgb4', 'ipoib', 'iser', 'iwcm', 'mad', 'misc', 'mlx4', 'mlx5', 'ocrdma' and 'srp' into for-next	2014-08-14 08:58:04 -07:00
rxrpc
scsi	SCSI misc on 20140815	2014-08-15 18:28:58 -06:00
soc/tegra
sound
target
trace	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2014-08-14 10:14:07 -06:00
uapi	Merge branch 'akpm' (fixes from Andrew Morton)	2014-08-29 16:28:29 -07:00
video	fbdev changes for 3.17	2014-08-08 18:09:33 -07:00
xen
Kbuild