Re: [GIT PULL] ring-buffer: Allow for rescheduling when removing pages

2018-09-19 Thread Greg Kroah-Hartman
On Wed, Sep 19, 2018 at 09:39:23AM -0400, Steven Rostedt wrote: > On Wed, 19 Sep 2018 08:07:06 +0200 > Greg Kroah-Hartman wrote: > > > On Tue, Sep 18, 2018 at 07:14:13PM -0400, Steven Rostedt wrote: > > > > > > Linus (aka Greg), > > > > > > Vaibhav Nagarnaik found that modifying the ring buffer

Re: [GIT PULL] ring-buffer: Allow for rescheduling when removing pages

2018-09-19 Thread Steven Rostedt
On Wed, 19 Sep 2018 08:07:06 +0200 Greg Kroah-Hartman wrote: > On Tue, Sep 18, 2018 at 07:14:13PM -0400, Steven Rostedt wrote: > > > > Linus (aka Greg), > > > > Vaibhav Nagarnaik found that modifying the ring buffer size could cause > > a huge latency in the system because it does a while loop

Re: [GIT PULL] ring-buffer: Allow for rescheduling when removing pages

2018-09-18 Thread Greg Kroah-Hartman
On Tue, Sep 18, 2018 at 07:14:13PM -0400, Steven Rostedt wrote: > > Linus (aka Greg), > > Vaibhav Nagarnaik found that modifying the ring buffer size could cause > a huge latency in the system because it does a while loop to free pages > without releasing the CPU (on non preempt kernels). In a ca

[GIT PULL] ring-buffer: Allow for rescheduling when removing pages

2018-09-18 Thread Steven Rostedt
Linus (aka Greg), Vaibhav Nagarnaik found that modifying the ring buffer size could cause a huge latency in the system because it does a while loop to free pages without releasing the CPU (on non preempt kernels). In a case where there are hundreds of thousands of pages to free it could actually