On Mon, 17 Jul 2017, Liang, Kan wrote: > There are three proposed patches so far. > Patch 1: The patch as above which speed up the hrtimer. > Patch 2: Thomas's first proposal. > https://patchwork.kernel.org/patch/9803033/ > https://patchwork.kernel.org/patch/9805903/ > Patch 3: my original proposal which increase the NMI watchdog timeout by 3X > https://patchwork.kernel.org/patch/9802053/ > > According to our test, only patch 3 works well. > The other two patches will hang the system eventually. > For patch 1, the system hang after running our test case for ~1 hour. > For patch 2, the system hang in running the overnight test. > There is no error message shown when the system hang. So I don't know the > root cause yet. That doesn't make sense. What's the exact test procedure? > BTW: We set 1 to watchdog_thresh when we did the test. > It's believed that can speed up the failure. Believe is not really a technical measure.... Thanks, tglx