Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend

[PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Stephen Hemminger <stephen@networkplumber.org> · 2013-01-22
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Steven Rostedt <rostedt@goodmis.org> · 2013-01-22
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Steven Rostedt <rostedt@goodmis.org> · 2013-01-22
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Michel Lespinasse <hidden> · 2013-01-24
[PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · oleg@redhat.com (Oleg Nesterov) · 2013-01-24
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · David Howells <dhowells@redhat.com> · 2013-02-11
Re: [PATCH v5 01/45] percpu_rwlock: Introduce the global reader-writer lock backend · Srivatsa S. Bhat <hidden> · 2013-02-11
[PATCH v5 02/45] percpu_rwlock: Introduce per-CPU variables for the reader and the writer · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 03/45] percpu_rwlock: Provide a way to define and init percpu-rwlocks at compile time · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Tejun Heo <tj@kernel.org> · 2013-01-23
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-01-23
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Tejun Heo <tj@kernel.org> · 2013-01-23
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-01-24
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Paul E. McKenney <hidden> · 2013-02-08
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Oleg Nesterov <oleg@redhat.com> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Oleg Nesterov <oleg@redhat.com> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Paul E. McKenney <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Paul E. McKenney <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Paul E. McKenney <hidden> · 2013-02-12
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Paul E. McKenney <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Oleg Nesterov <oleg@redhat.com> · 2013-02-10
Re: [PATCH v5 04/45] percpu_rwlock: Implement the core design of Per-CPU Reader-Writer Locks · Srivatsa S. Bhat <hidden> · 2013-02-10
[PATCH v5 05/45] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 05/45] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally · Paul E. McKenney <hidden> · 2013-02-08
Re: [PATCH v5 05/45] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally · Srivatsa S. Bhat <hidden> · 2013-02-10
Re: [PATCH v5 05/45] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally · Oleg Nesterov <oleg@redhat.com> · 2013-02-10
Re: [PATCH v5 05/45] percpu_rwlock: Make percpu-rwlocks IRQ-safe, optimally · Srivatsa S. Bhat <hidden> · 2013-02-10
[PATCH v5 06/45] percpu_rwlock: Allow writers to be readers, and add lockdep annotations · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 06/45] percpu_rwlock: Allow writers to be readers, and add lockdep annotations · Paul E. McKenney <hidden> · 2013-02-08
Re: [PATCH v5 06/45] percpu_rwlock: Allow writers to be readers, and add lockdep annotations · Srivatsa S. Bhat <hidden> · 2013-02-10
[PATCH v5 07/45] CPU hotplug: Provide APIs to prevent CPU offline from atomic context · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 07/45] CPU hotplug: Provide APIs to prevent CPU offline from atomic context · Paul E. McKenney <hidden> · 2013-02-08
[PATCH v5 08/45] CPU hotplug: Convert preprocessor macros to static inline functions · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 08/45] CPU hotplug: Convert preprocessor macros to static inline functions · Paul E. McKenney <hidden> · 2013-02-08
[PATCH v5 09/45] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 09/45] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly · Paul E. McKenney <hidden> · 2013-02-09
Re: [PATCH v5 09/45] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly · Srivatsa S. Bhat <hidden> · 2013-02-10
Re: [PATCH v5 09/45] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly · Paul E. McKenney <hidden> · 2013-02-10
Re: [PATCH v5 09/45] smp, cpu hotplug: Fix smp_call_function_*() to prevent CPU offline properly · Srivatsa S. Bhat <hidden> · 2013-02-10
[PATCH v5 10/45] smp, cpu hotplug: Fix on_each_cpu_*() to prevent CPU offline properly · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 11/45] sched/timer: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 12/45] sched/migration: Use raw_spin_lock/unlock since interrupts are already disabled · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 13/45] sched/rt: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 14/45] rcu, CPU hotplug: Fix comment referring to stop_machine() · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 14/45] rcu, CPU hotplug: Fix comment referring to stop_machine() · Paul E. McKenney <hidden> · 2013-02-09
Re: [PATCH v5 14/45] rcu, CPU hotplug: Fix comment referring to stop_machine() · Srivatsa S. Bhat <hidden> · 2013-02-10
[PATCH v5 15/45] tick: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 16/45] time/clocksource: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 17/45] softirq: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 18/45] irq: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 19/45] net: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 20/45] block: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 21/45] crypto: pcrypt - Protect access to cpu_online_mask with get/put_online_cpus() · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 22/45] infiniband: ehca: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 23/45] [SCSI] fcoe: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 24/45] staging: octeon: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 25/45] x86: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 27/45] KVM: Use get/put_online_cpus_atomic() to prevent CPU offline from atomic context · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 28/45] kvm/vmx: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 26/45] perf/x86: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 29/45] x86/xen: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 29/45] x86/xen: Use get/put_online_cpus_atomic() to prevent CPU offline · Konrad Rzeszutek Wilk <konrad@kernel.org> · 2013-02-19
Re: [PATCH v5 29/45] x86/xen: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-02-19
[PATCH v5 30/45] alpha/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 31/45] blackfin/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 31/45] blackfin/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Bob Liu <hidden> · 2013-01-28
Re: [PATCH v5 31/45] blackfin/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Tejun Heo <tj@kernel.org> · 2013-01-28
Re: [PATCH v5 31/45] blackfin/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-29
[PATCH v5 32/45] cris/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 33/45] hexagon/smp: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 34/45] ia64: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 35/45] m32r: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 36/45] MIPS: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 37/45] mn10300: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 38/45] parisc: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 39/45] powerpc: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 40/45] sh: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 41/45] sparc: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 42/45] tile: Use get/put_online_cpus_atomic() to prevent CPU offline · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 43/45] cpu: No more __stop_machine() in _cpu_down() · Srivatsa S. Bhat <hidden> · 2013-01-22
[PATCH v5 44/45] CPU hotplug, stop_machine: Decouple CPU hotplug from stop_machine() in Kconfig · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 44/45] CPU hotplug, stop_machine: Decouple CPU hotplug from stop_machine() in Kconfig · Paul E. McKenney <hidden> · 2013-02-09
Re: [PATCH v5 44/45] CPU hotplug, stop_machine: Decouple CPU hotplug from stop_machine() in Kconfig · Srivatsa S. Bhat <hidden> · 2013-02-10
[PATCH v5 45/45] Documentation/cpu-hotplug: Remove references to stop_machine() · Srivatsa S. Bhat <hidden> · 2013-01-22
Re: [PATCH v5 45/45] Documentation/cpu-hotplug: Remove references to stop_machine() · Paul E. McKenney <hidden> · 2013-02-09
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-04
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Rusty Russell <hidden> · 2013-02-07
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-07
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Russell King - ARM Linux <hidden> · 2013-02-08
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-08
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-08
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Vincent Guittot <vincent.guittot@linaro.org> · 2013-02-11
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-11
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Paul E. McKenney <hidden> · 2013-02-11
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-12
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Vincent Guittot <vincent.guittot@linaro.org> · 2013-02-15
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-15
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Vincent Guittot <vincent.guittot@linaro.org> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Vincent Guittot <vincent.guittot@linaro.org> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Steven Rostedt <rostedt@goodmis.org> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Vincent Guittot <vincent.guittot@linaro.org> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Steven Rostedt <rostedt@goodmis.org> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Steven Rostedt <rostedt@goodmis.org> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Vincent Guittot <vincent.guittot@linaro.org> · 2013-02-19
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Thomas Gleixner <hidden> · 2013-02-18
Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug · Srivatsa S. Bhat <hidden> · 2013-02-18

From: Steven Rostedt <rostedt@goodmis.org>
Date: 2013-01-22 20:54:29
Also in: linux-arch, linux-arm-kernel, linuxppc-dev, lkml, netdev

On Wed, 2013-01-23 at 01:28 +0530, Srivatsa S. Bhat wrote:

quoted

I thought global locks are now fair. That is, a reader will block if a
writer is waiting. Hence, the above should deadlock on the current
rwlock_t types.

Oh is it? Last I checked, lockdep didn't complain about this ABBA scenario!

It doesn't and Peter Zijlstra said we need to fix that ;-)  It only
recently became an issue with the new "fair" locking of rwlocks.

-- Steve

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