Re: [PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-06-17 Thread Davidlohr Bueso
If there are no objections, now that the merge window closed, could this be considered for v4.19? Thanks, Davidlohr On Tue, 10 Apr 2018, Davidlohr Bueso wrote: By applying well known spin-on-lock-owner techniques, we can avoid the blocking overhead during the process of when the task is trying

Re: [PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-04-21 Thread Davidlohr Bueso
On Fri, 20 Apr 2018, Mike Galbraith wrote: On Fri, 2018-04-20 at 17:50 +0200, Peter Zijlstra wrote: Is this similar to what we have in RT (which, IIRC, has an optimistic spinning implementation as well)? For the RT spinlock replacement, the top waiter can spin. Yeah and the difference with

Re: [PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-04-20 Thread Mike Galbraith
On Fri, 2018-04-20 at 17:50 +0200, Peter Zijlstra wrote: > On Tue, Apr 10, 2018 at 09:27:50AM -0700, Davidlohr Bueso wrote: > > By applying well known spin-on-lock-owner techniques, we can avoid the > > blocking overhead during the process of when the task is trying to take > > the rtmutex. The ide

Re: [PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-04-20 Thread Peter Zijlstra
On Tue, Apr 10, 2018 at 09:27:50AM -0700, Davidlohr Bueso wrote: > By applying well known spin-on-lock-owner techniques, we can avoid the > blocking overhead during the process of when the task is trying to take > the rtmutex. The idea is that as long as the owner is running, there is a > fair chan

Re: [PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-04-17 Thread Davidlohr Bueso
On Wed, 11 Apr 2018, kbuild test robot wrote: Hi Davidlohr, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v4.16 next-20180411] [if your patch is applied to the wrong git tree, please drop us a note to help improve the sy

Re: [PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-04-11 Thread kbuild test robot
Hi Davidlohr, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v4.16 next-20180411] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/

[PATCH 2/2] rtmutex: Reduce top-waiter blocking on a lock

2018-04-10 Thread Davidlohr Bueso
By applying well known spin-on-lock-owner techniques, we can avoid the blocking overhead during the process of when the task is trying to take the rtmutex. The idea is that as long as the owner is running, there is a fair chance it'll release the lock soon, and thus a task trying to acquire the rtm