On 11 March 2014 15:56, Viresh Kumar viresh.kumar@linaro.org wrote:
Hi Thomas,
On 28 February 2014 18:52, Thomas Gleixner tglx@linutronix.de wrote:
On Fri, 28 Feb 2014, Viresh Kumar wrote:
Currently we are using two lowest bit of base for internal purpose and so they both should be zero in the allocated address. The code was doing the right thing before this patch came in:
commit c5f66e99b7cb091e3d51ae8e8156892e8feb7fa3 Author: Tejun Heo tj@kernel.org Date: Wed Aug 8 11:10:28 2012 -0700
timer: Implement TIMER_IRQSAFETejun probably forgot to update this piece of code which checks if the lowest 'n' bits are zero or not and so wasn't updated according to the new flag. Lets use TIMER_FLAG_MASK in the calculations here, so that this code wouldn't require a change later on with another flag in.
Are you planning to introduce more flag horror? Don't go there. The timer_list code is about to be rewritten completely and I'm not going to add new features to the existing code base.
Do you already have stuff prepared that can be shared on that? I am asking because I am working on some CPU isolation stuff for Networking domain and it looks like I need to add another of these flags :( .. I know its just not acceptable and so wanted your thoughts on how can I get things fixed.
Peter asked me to implement something like cpuset.quiesce to move away all timers/workqueues/etc from a cpuset. It was proposed here:
https://lkml.org/lkml/2014/1/15/186
Now, I was looking to migrate away the timers first but I obviously shouldn't migrate the pinned timers. One way out to identify PINNED timers is to mark them PINNED with the flag bits, which you wouldn't allow. Can you give some other idea with which I can get this solved.
Ping!!