[PATCH RFC tip/core/rcu 0/30] RCU commits queued for 2.6.36/7

Hello! This patchset shows the patches queued for 2.6.36/7. These are not yet ready to move upstream due to dependencies on commits moving up other trees. The patches are as follows: 1-19. These are the remaining patches implementing Arnd's ...

Message posted on the July 14th, 2010 - 4:10 PM ET

[PATCH RFC tip/core/rcu 0/10] rcu: patches queued for 2.6.35

Hello! RFC preview of RCU patches queued for 2.6.35: 1. substitute set_need_resched for sending resched IPIs This reduces OS jitter. 2. make dead code really dead 3. move some code from macro to function Cleanups from Lai Jiangshan. 4. ignore ...

Message posted on the April 5th, 2010 - 2:40 PM ET

[PATCH RFC tip/core/rcu 0/3] v1 RCU priority boosting

Hello! This patch set is the first version of RCU priority boosting, consisting of the following: 1. Add RCU priority inversion testing to rcutorture. 2. Move TINY_RCU grace-period processing from softirq to kthread to allow boosting. 3. Implement ...

Message posted on the September 28th, 2010 - 8:40 PM ET

[PATCH RFC tip/core/rcu 0/12] preview of RCU patches for 2.6.38

Hello! This patchset contains RCU priority boosting for the tiny RCU implementations and a number of fixes and cleanups. The patches are as follows: 1. Add rcutorture tests to check for boosting. 2-6. RCU priority boosting for the tiny RCU ...

Message posted on the November 6th, 2010 - 9:10 PM ET

[PATCH RFC tip/core/rcu] rcu: direct algorithmic SRCU implementation

The current implementation of synchronize_srcu_expedited() can cause severe OS jitter due to its use of synchronize_sched(), which in turn invokes try_stop_cpus(), which causes each CPU to be sent an IPI. This can result in severe performance ...

Message posted on the February 12th, 2012 - 9:20 PM ET

[PATCH RFC tip/core/urgent] rcu: Avoid having just-onlined CPU resched itself when RCU is idle

CPUs set rdp->qs_pending when coming online to resolve races with grace-period start. However, this means that if RCU is idle, the just-onlined CPU might needlessly send itself resched IPIs. Adjust the online-CPU initialization to avoid this, ...

Message posted on the August 19th, 2011 - 12:40 PM ET

[PATCH RFC -tip 0/6] IRQ-bound performance events

Hello, This patchset is against perf/core branch. This is an an attempt to introduce IRQ-bound performance events - ones that only count in a context of a hardware interrupt handler. The aim is to measure events which can not be measured using ...

Message posted on the December 17th, 2012 - 7:00 AM ET

[PATCH RFC tip/core/rcu 0/4] Updates to RCU_FAST_NO_HZ

Hello! This series covers enhancements to RCU_FAST_NO_HZ intended for v3.4-rc2. The individual commits are as follows: 1. Add tracing to rcu_cleanup_after_idle(). 2. Switch from hrtimer to normal timers to reduce overhead. 3. Upgrade ...

Message posted on the April 23rd, 2012 - 12:20 PM ET

[PATCH RFC tip/core/rcu 0/28] Preview of RCU changes for 3.3

Hello! This patchset permits idle tasks to use RCU read-side critical sections, although they are still prohibited between tick_nohz_idle_exit_norcu() and tick_nohz_idle_exit_norcu(); makes synchronize_sched_expedited() better able to share work ...

Message posted on the November 2nd, 2011 - 3:40 PM ET

[PATCH RFC V3 0/4] kvm : Paravirt-spinlock support for KVM guests

The 4-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based on Xen's implementation. One hypercall is introduced in KVM hypervisor,that allows a vcpu to kick another ...

Message posted on the November 30th, 2011 - 4:00 AM ET

[PATCH RFC V2 0/5] kvm : Paravirt-spinlock support for KVM guests

The 5-patch series to follow this email extends KVM-hypervisor and Linux guest running on KVM-hypervisor to support pv-ticket spinlocks, based heavily on Xen's implementation. Two hypercalls are being introduced in KVM hypervisor, one that allows a ...

Message posted on the October 23rd, 2011 - 3:10 PM ET

[RFC -tip] x86, apic: Merge x2apic code

Hi, while being at x2apic_x.c code I noted that files look similar to each other so I guessed may be we could merge them. As result -- this patch. Note that patch was only _compile_ tested, I don't have such apic for real. I've trying to make it ...

Message posted on the November 10th, 2010 - 2:30 PM ET

[PATCH] [RFC] ntp: Fix leap-second hrtimer livelock

Since commit 7dffa3c673fbcf835cd7be80bb4aec8ad3f51168 the ntp subsystem has used an hrtimer for triggering the leapsecond adjustment. However, this can cause a potential livelock. Thomas diagnosed this as the following pattern: CPU 0 ...

Message posted on the March 15th, 2012 - 8:10 PM ET

[PATCH 0/8] [PATCH RFC V2] Paravirtualized ticketlocks

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> [ Changes since last posting: - fold all the cleanup/bugfix patches into their base patches - change spin_lock to make sure fastpath has no cruft in it - make sure it doesn't attempt ...

Message posted on the September 2nd, 2011 - 8:00 PM ET

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