Re: [RFC PATCH] tasklet: ignore disabled tasklet in tasklet_action

2012-11-05 Thread Andrew Morton
On Tue, 6 Nov 2012 09:22:16 +0800 Xiaotian Feng wrote: > On Tue, Nov 6, 2012 at 6:52 AM, Andrew Morton > wrote: > > On Fri, 2 Nov 2012 10:48:54 +0800 > > Xiaotian Feng wrote: > > > >> We met a ksoftirqd 100% issue, the perf top shows kernel is busy > >> with tasklet_action(), but no actual ac

Re: [RFC PATCH] tasklet: ignore disabled tasklet in tasklet_action

2012-11-05 Thread Xiaotian Feng
On Tue, Nov 6, 2012 at 6:52 AM, Andrew Morton wrote: > On Fri, 2 Nov 2012 10:48:54 +0800 > Xiaotian Feng wrote: > >> We met a ksoftirqd 100% issue, the perf top shows kernel is busy >> with tasklet_action(), but no actual action is shown. From dumped >> kernel, there's only one disabled tasklet

Re: [RFC PATCH] tasklet: ignore disabled tasklet in tasklet_action

2012-11-05 Thread Andrew Morton
On Fri, 2 Nov 2012 10:48:54 +0800 Xiaotian Feng wrote: > We met a ksoftirqd 100% issue, the perf top shows kernel is busy > with tasklet_action(), but no actual action is shown. From dumped > kernel, there's only one disabled tasklet on the tasklet_vec. > > tasklet_action might be handled after

[RFC PATCH] tasklet: ignore disabled tasklet in tasklet_action

2012-11-01 Thread Xiaotian Feng
We met a ksoftirqd 100% issue, the perf top shows kernel is busy with tasklet_action(), but no actual action is shown. From dumped kernel, there's only one disabled tasklet on the tasklet_vec. tasklet_action might be handled after tasklet is disabled, this will make disabled tasklet stayed on task