Re: [PATCH] sched/rt: Avoid updating RT entry timeout twice within one tick period

2012-07-18 Thread Steven Rostedt
On Tue, 2012-07-17 at 15:03 +0800, Ying Xue wrote: > To solve the issue, we prevent the timeout value from increasing twice > within one tick time by remembering the jiffies value of lastly updating > the timeout. As long as the RT task's jiffies is different with the > global jiffies value, we

Re: [PATCH] sched/rt: Avoid updating RT entry timeout twice within one tick period

2012-07-18 Thread Steven Rostedt
On Tue, 2012-07-17 at 15:03 +0800, Ying Xue wrote: To solve the issue, we prevent the timeout value from increasing twice within one tick time by remembering the jiffies value of lastly updating the timeout. As long as the RT task's jiffies is different with the global jiffies value, we allow

[PATCH] sched/rt: Avoid updating RT entry timeout twice within one tick period

2012-07-17 Thread Ying Xue
Firstly please pay attention to below issue which is found in a lower version(2.6.34-rt) rather than mainline rt kernel. Although some big changes have happened from that point to now, especially every softirq does not run as one thread any more, we believe in the latest upstream version the issue

[PATCH] sched/rt: Avoid updating RT entry timeout twice within one tick period

2012-07-17 Thread Ying Xue
Firstly please pay attention to below issue which is found in a lower version(2.6.34-rt) rather than mainline rt kernel. Although some big changes have happened from that point to now, especially every softirq does not run as one thread any more, we believe in the latest upstream version the issue