Re: Suspend/resume with FTRACE enabled doesnât work anymore

[Paul Menzel]

Dear Steven,


On 01/17/18 17:25, Steven Rostedt wrote:
> On Wed, 17 Jan 2018 11:19:43 -0500
> Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
>
> > On Wed, 17 Jan 2018 11:10:31 -0500
> > Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> >
> >
> > > It's been fixed, and the the patch is in Linus's tree already:
> > >
> > >   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0e3a18f4baf8e3754ac1e56f0ade924d0c0c721
> >
> > Although I just noticed that the revert, also reverted the required
> > barriers. I'll go add them back in.
>
> I take that back. Barriers are not needed, as interrupts do not need to
> see the updates. And looking at the patch being reverted, I don't think
> they were needed there either. The update to those bits only need to be
> done for the current context to prevent recursion at that context. And
> that was the case with the commit that was reverted.

The problem is indeed fixed in latest Linusâ master with commit a0e3a18f 
(ring-buffer: Bring back context level recursive checks). Thank you.


Kind regards,

Paul

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