rcu

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2023/12/18 [PATCH 2/3] rcu: Defer RCU kthreads wakeup when CPU is dying Frederic Weisbecker
2023/12/18 [PATCH 1/3] hrtimer: Report offline hrtimer enqueue Frederic Weisbecker
2023/12/18 [PATCH 0/3] timers & RCU: Fix TREE03 stalls Frederic Weisbecker
2023/12/18 Re: [PATCH v2] srcu: Improve comments about acceleration leak Frederic Weisbecker
2023/12/18 Re: [PATCH v2] srcu: Improve comments about acceleration leak Joel Fernandes
2023/12/18 Re: [PATCH v2] srcu: Improve comments about acceleration leak Frederic Weisbecker
2023/12/17 Re: [PATCH v2] srcu: Improve comments about acceleration leak Joel Fernandes
2023/12/16 Re: [PATCH v2] srcu: Improve comments about acceleration leak Frederic Weisbecker
2023/12/15 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Joel Fernandes
2023/12/15 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Paul E. McKenney
2023/12/15 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Uladzislau Rezki
2023/12/15 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Joel Fernandes
2023/12/13 [linux-next:master] BUILD REGRESSION 48e8992e33abf054bcc0bb2e77b2d43bb899212e kernel test robot
2023/12/13 Re: [PATCH rcu 3/3] srcu: Explain why callbacks invocations can't run concurrently Joel Fernandes
2023/12/13 Re: [PATCH rcu 3/3] srcu: Explain why callbacks invocations can't run concurrently Paul E. McKenney
2023/12/13 [PATCH rcu 4/3] srcu: Use try-lock lockdep annotation for NMI-safe access. Neeraj Upadhyay (AMD)
2023/12/13 Re: [PATCH rcu 3/3] srcu: Explain why callbacks invocations can't run concurrently Joel Fernandes
2023/12/13 Re: [PATCH v2] srcu: Improve comments about acceleration leak Paul E. McKenney
2023/12/13 Re: [PATCH rcu 3/3] srcu: Explain why callbacks invocations can't run concurrently Paul E. McKenney
2023/12/13 Re: [PATCH rcu 3/3] srcu: Explain why callbacks invocations can't run concurrently Joel Fernandes
2023/12/13 Re: [PATCH 1/8] rcu/nocb: Make IRQs disablement symetric Neeraj upadhyay
2023/12/13 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Uladzislau Rezki
2023/12/12 Re: [PATCH rcu 3/3] rcu: Force quiescent states only for ongoing grace period Joel Fernandes
2023/12/12 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Joel Fernandes
2023/12/12 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Joel Fernandes
2023/12/12 Re: [PATCH v2] srcu: Improve comments about acceleration leak Joel Fernandes
2023/12/12 Re: [PATCH rcu 3/5] doc: Clarify RCU Tasks reader/updater checklist Joel Fernandes
2023/12/12 [PATCH rcu 3/3] srcu: Explain why callbacks invocations can't run concurrently Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 1/3] srcu: Remove superfluous callbacks advancing from srcu_gp_start() Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 2/3] srcu: No need to advance/accelerate if no callback enqueued Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 0/3] SRCU updates for v6.8 Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 1/1] rcu-tasks: Mark RCU Tasks accesses to current->rcu_tasks_idle_cpu Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 0/1] RCU tasks updates for v6.8 Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 3/3] rcu: Force quiescent states only for ongoing grace period Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 1/3] rcu: Restrict access to RCU CPU stall notifiers Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 2/3] rcu: Remove unused macros from rcupdate.h Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 0/3] RCU misc fixes for v6.8 Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 4/4] rcutorture: Add fqs_holdoff check before fqs_task is created Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 3/4] rcutorture: Add mid-sized stall to TREE07 Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 2/4] rcutorture: add nolibc init support for mips, ppc and rv64 Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 1/4] locktorture: Increase Hamming distance between call_rcu_chain and rcu_call_chains Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 0/4] RCU/lock torture updates for v6.8 Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 5/5] doc: Clarify historical disclaimers in memory-barriers.txt Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 4/5] doc: Mention address and data dependencies in rcu_dereference.rst Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 2/5] rculist.h: docs: Fix wrong function summary Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 3/5] doc: Clarify RCU Tasks reader/updater checklist Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 1/5] Documentation: RCU: Remove repeated word in comments Neeraj Upadhyay (AMD)
2023/12/12 [PATCH rcu 0/5] Documentation updates for v6.8 Neeraj Upadhyay (AMD)
2023/12/12 Re: [PATCH 4/8] rcu/exp: Handle RCU expedited grace period kworker allocation failure Kalesh Singh
2023/12/12 Re: [PATCH 3/8] rcu/exp: Fix RCU expedited parallel grace period kworker allocation failure recovery Kalesh Singh
2023/12/12 Re: [PATCH 3/8] rcu/exp: Fix RCU expedited parallel grace period kworker allocation failure recovery Kalesh Singh
2023/12/12 Re: [PATCH 0/8] rcu: Fix expedited GP deadlock (and cleanup some nocb stuff) Frederic Weisbecker
2023/12/12 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Uladzislau Rezki
2023/12/12 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Qais Yousef
2023/12/11 Re: [PATCH 0/8] rcu: Fix expedited GP deadlock (and cleanup some nocb stuff) Paul E. McKenney
2023/12/11 Re: [PATCH 0/8] rcu: Fix expedited GP deadlock (and cleanup some nocb stuff) Frederic Weisbecker
2023/12/11 Re: [PATCH 0/8] rcu: Fix expedited GP deadlock (and cleanup some nocb stuff) Paul E. McKenney
2023/12/10 [PATCH v2] srcu: Improve comments about acceleration leak Joel Fernandes (Google)
2023/12/10 [PATCH] srcu: Improvement comments about acceleration leak Joel Fernandes (Google)
2023/12/08 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Joel Fernandes
2023/12/08 [PATCH 6/8] rcu/exp: Make parallel exp gp kworker per rcu node Frederic Weisbecker
2023/12/08 [PATCH 8/8] rcu/exp: Remove rcu_par_gp_wq Frederic Weisbecker
2023/12/08 [PATCH 7/8] rcu/exp: Handle parallel exp gp kworkers affinity Frederic Weisbecker
2023/12/08 [PATCH 4/8] rcu/exp: Handle RCU expedited grace period kworker allocation failure Frederic Weisbecker
2023/12/08 [PATCH 5/8] rcu: s/boost_kthread_mutex/kthread_mutex Frederic Weisbecker
2023/12/08 [PATCH 3/8] rcu/exp: Fix RCU expedited parallel grace period kworker allocation failure recovery Frederic Weisbecker
2023/12/08 [PATCH 1/8] rcu/nocb: Make IRQs disablement symetric Frederic Weisbecker
2023/12/08 [PATCH 2/8] rcu/nocb: Re-arrange call_rcu() NOCB specific code Frederic Weisbecker
2023/12/08 [PATCH 0/8] rcu: Fix expedited GP deadlock (and cleanup some nocb stuff) Frederic Weisbecker
2023/12/07 Re: About the conflict between XFS inode recycle and VFS rcu-walk Dave Chinner
2023/12/07 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Qais Yousef
2023/12/05 Re: [RCU] rcu_tasks_trace_qs(): trc_reader_special.b.need_qs value incorrect likely()? Paul E. McKenney
2023/12/05 Re: [RCU] rcu_tasks_trace_qs(): trc_reader_special.b.need_qs value incorrect likely()? Steven Rostedt
2023/12/05 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Joel Fernandes
2023/12/05 About the conflict between XFS inode recycle and VFS rcu-walk alexjlzheng
2023/12/04 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Paul E. McKenney
2023/12/04 Re: [PATCH v2] srcu: Use try-lock lockdep annotation for NMI-safe access. Paul E. McKenney
2023/12/04 Re: [PATCH 0/3] rcu/nocb updates v2 Paul E. McKenney
2023/12/03 Re: [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Andrea Righi
2023/12/02 [PATCH v2] rcu: Provide a boot time parameter to control lazy RCU Qais Yousef
2023/12/02 Re: [RCU] rcu_tasks_trace_qs(): trc_reader_special.b.need_qs value incorrect likely()? Steven Rostedt
2023/12/02 Re: [RCU] rcu_tasks_trace_qs(): trc_reader_special.b.need_qs value incorrect likely()? Paul E. McKenney
2023/12/01 [RCU] rcu_tasks_trace_qs(): trc_reader_special.b.need_qs value incorrect likely()? Steven Rostedt
2023/11/30 [PATCH v2] srcu: Use try-lock lockdep annotation for NMI-safe access. Sebastian Andrzej Siewior
2023/11/28 [PATCH v3 2/7] rcu: Add a trace event for synchronize_rcu_normal() Uladzislau Rezki (Sony)
2023/11/28 [PATCH v3 7/7] rcu: Add CONFIG_RCU_SR_NORMAL_DEBUG_GP Uladzislau Rezki (Sony)
2023/11/28 [PATCH v3 5/7] rcu: Support direct wake-up of synchronize_rcu() users Uladzislau Rezki (Sony)
2023/11/28 [PATCH v3 3/7] doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt Uladzislau Rezki (Sony)
2023/11/28 [PATCH v3 1/7] rcu: Reduce synchronize_rcu() latency Uladzislau Rezki (Sony)
2023/11/28 [PATCH v3 6/7] rcu: Move sync related data to rcu_state structure Uladzislau Rezki (Sony)
2023/11/28 [PATCH v3 4/7] rcu: Improve handling of synchronize_rcu() users Uladzislau Rezki (Sony)
2023/11/27 Re: Neeraj will be doing RCU PR for v6.8 merge window Paul E. McKenney
2023/11/27 Neeraj will be doing RCU PR for v6.8 merge window Paul E. McKenney
2023/11/25 Re: [PATCH 6.6 000/530] 6.6.3-rc1 review Greg Kroah-Hartman
2023/11/25 Re: [PATCH 6.1 000/372] 6.1.64-rc1 review Greg Kroah-Hartman
2023/11/24 Re: [PATCH 6.1 000/372] 6.1.64-rc1 review Naresh Kamboju
2023/11/24 Re: [PATCH 6.6 000/530] 6.6.3-rc1 review Naresh Kamboju
2023/11/23 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Paul E. McKenney
2023/11/23 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Frederic Weisbecker
2023/11/23 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Paul E. McKenney
2023/11/23 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Qais Yousef
2023/11/23 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Qais Yousef
2023/11/22 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Andrea Righi
2023/11/22 PSA: this list has moved to new vger infra (no action required) Konstantin Ryabitsev
2023/11/22 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Paul E. McKenney
2023/11/22 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Qais Yousef
2023/11/22 Re: [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Paul E. McKenney
2023/11/22 [PATCH] rcu: Provide a boot time parameter to enable lazy RCU Qais Yousef
2023/11/22 Re: [REPOST PATCH] srcu: Use try-lock lockdep annotation for NMI-safe access. Boqun Feng
2023/11/21 [REPOST PATCH] srcu: Use try-lock lockdep annotation for NMI-safe access. Sebastian Andrzej Siewior
2023/11/20 Re: [rt-devel:linux-6.6.y-rt] [printk] 78f4b59c6f: BUG:kernel_failed_in_early-boot_stage,last_printk:early_console_in_setup_code Sebastian Andrzej Siewior
2023/11/15 [rt-devel:linux-6.6.y-rt] [printk] 78f4b59c6f: BUG:kernel_failed_in_early-boot_stage,last_printk:early_console_in_setup_code kernel test robot
2023/11/15 [PATCH 3/3] rcu/nocb: Remove needless full barrier after callback advancing Frederic Weisbecker
2023/11/15 [PATCH 2/3] rcu/nocb: Remove needless LOAD-ACQUIRE Frederic Weisbecker
2023/11/15 [PATCH 1/3] rcu: Rename jiffies_till_flush to jiffies_lazy_flush Frederic Weisbecker
2023/11/15 [PATCH 0/3] rcu/nocb updates v2 Frederic Weisbecker
2023/11/09 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Uladzislau Rezki
2023/11/09 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Z qiang
2023/11/08 Re: [GIT PULL] RCU fixes for v6.7-rc1 pr-tracker-bot
2023/11/08 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Paul E. McKenney
2023/11/08 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Uladzislau Rezki
2023/11/07 Re: [bug report] rcu: Restrict access to RCU CPU stall notifiers Paul E. McKenney
2023/11/07 Re: [PATCH] rcu: Force quiescent states only for ongoing grace period Paul E. McKenney
2023/11/07 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Paul E. McKenney
2023/11/07 [bug report] rcu: Restrict access to RCU CPU stall notifiers Dan Carpenter
2023/11/07 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Uladzislau Rezki
2023/11/07 [GIT PULL] RCU fixes for v6.7-rc1 Frederic Weisbecker
2023/11/06 Re: [PATCH] rcu: Force quiescent states only for ongoing grace period Z qiang
2023/11/06 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Paul E. McKenney
2023/11/06 [PATCH AUTOSEL 6.1 03/11] srcu: Fix srcu_struct node grpmask overflow on 64-bit systems Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.1 02/11] rcu: Dump memory object info if callback function is invalid Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.5 02/13] rcu: Dump memory object info if callback function is invalid Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.5 09/13] srcu: Only accelerate on enqueue time Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.5 03/13] srcu: Fix srcu_struct node grpmask overflow on 64-bit systems Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.6 09/13] srcu: Only accelerate on enqueue time Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.6 03/13] srcu: Fix srcu_struct node grpmask overflow on 64-bit systems Sasha Levin
2023/11/06 [PATCH AUTOSEL 6.6 02/13] rcu: Dump memory object info if callback function is invalid Sasha Levin
2023/11/06 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Uladzislau Rezki
2023/11/03 Re: [PATCH] rcutorture: Add fqs_holdoff check before the fqs_task is created Paul E. McKenney
2023/11/03 Re: [PATCH] rcu: Force quiescent states only for ongoing grace period Paul E. McKenney
2023/11/03 Re: [PATCH] rcutorture: Add fqs_holdoff check before the fqs_task is created Z qiang
2023/11/03 [PATCH] rcutorture: Add fqs_holdoff check before the fqs_task is created Zqiang
2023/11/03 Re: [PATCH] rcu: Force quiescent states only for ongoing grace period Z qiang
2023/11/02 Re: [PATCH] rcu: Force quiescent states only for ongoing grace period Paul E. McKenney
2023/11/02 Re: [PATCH 1/3] rcu: Reduce synchronize_rcu() waiting time Uladzislau Rezki
2023/11/01 Re: [PATCH v2 3/3] doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt Paul E. McKenney
2023/11/01 Re: [PATCH v2 2/3] rcu: Add a trace event for synchronize_rcu_normal() Paul E. McKenney
2023/11/01 Re: [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Paul E. McKenney
2023/11/01 Re: [GIT PULL] RCU changes for v6.7 Paul E. McKenney
2023/11/01 Re: [PATCH 1/3] rcu: Reduce synchronize_rcu() waiting time Boqun Feng
2023/11/01 Re: [GIT PULL] RCU changes for v6.7 Paul E. McKenney
2023/11/01 Re: [GIT PULL] RCU changes for v6.7 Paul E. McKenney
2023/11/01 Re: [GIT PULL] RCU changes for v6.7 Linus Torvalds
2023/11/01 Re: [PATCH 1/3] rcu: Reduce synchronize_rcu() waiting time Uladzislau Rezki
2023/11/01 Re: [PATCH 1/3] rcu: Reduce synchronize_rcu() waiting time Uladzislau Rezki
2023/11/01 Re: [PATCH] refscale: Optimize process_durations() Paul E. McKenney
2023/11/01 Re: [PATCH] refscale: Optimize process_durations() Christophe JAILLET
2023/10/31 [PATCH] rcu: Force quiescent states only for ongoing grace period Zqiang
2023/10/31 Re: [GIT PULL] RCU changes for v6.7 Paul E. McKenney
2023/10/31 Re: [GIT PULL] RCU changes for v6.7 Linus Torvalds
2023/10/31 Re: [PATCH] refscale: Optimize process_durations() Paul E. McKenney
2023/10/31 Re: [PATCH] refscale: Optimize process_durations() Paul E. McKenney
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Michael Matz
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Michael Matz
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Michael Matz
2023/10/31 Re: [GIT PULL] RCU changes for v6.7 Paul E. McKenney
2023/10/31 Re: [GIT PULL] RCU changes for v6.7 Frederic Weisbecker
2023/10/31 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/30 Re: [GIT PULL] RCU changes for v6.7 pr-tracker-bot
2023/10/30 Re: [GIT PULL] RCU changes for v6.7 Linus Torvalds
2023/10/30 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/30 Re: [PATCH] refscale: Optimize process_durations() Davidlohr Bueso
2023/10/30 [PATCH v2 1/3] rcu: Reduce synchronize_rcu() latency Uladzislau Rezki (Sony)
2023/10/30 [PATCH v2 3/3] doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt Uladzislau Rezki (Sony)
2023/10/30 [PATCH v2 2/3] rcu: Add a trace event for synchronize_rcu_normal() Uladzislau Rezki (Sony)
2023/10/30 [PATCH v2 0/3] reduce latency of normal synchronize_rcu() v2 Uladzislau Rezki (Sony)
2023/10/30 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/29 Re: [PATCH 1/3] rcu: Reduce synchronize_rcu() waiting time Boqun Feng
2023/10/28 Re: [PATCH] refscale: Optimize process_durations() Steven Rostedt
2023/10/28 [PATCH] refscale: Optimize process_durations() Christophe JAILLET
2023/10/27 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/27 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/27 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Paul E. McKenney
2023/10/27 Re: [PATCH 0/4] rcu: Fix PF_IDLE related issues v3 Peter Zijlstra
2023/10/27 Re: [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Peter Zijlstra
2023/10/27 [PATCH 4/4] sched: Exclude CPU boot code from PF_IDLE area Frederic Weisbecker
2023/10/27 [PATCH 3/4] rcu/tasks-trace: Handle new PF_IDLE semantics Frederic Weisbecker
2023/10/27 [PATCH 2/4] rcu/tasks: Handle new PF_IDLE semantics Frederic Weisbecker
2023/10/27 [PATCH 1/4] rcu: Introduce rcu_cpu_online() Frederic Weisbecker
2023/10/27 [PATCH 0/4] rcu: Fix PF_IDLE related issues v3 Frederic Weisbecker
2023/10/27 [GIT PULL] RCU changes for v6.7 Frederic Weisbecker
2023/10/26 Re: bcachefs RCU warnings Kent Overstreet
2023/10/26 Re: bcachefs RCU warnings Paul E. McKenney