[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <YsXK5A0MiVgHd8Je@pc638.lan>
Date: Wed, 6 Jul 2022 19:48:20 +0200
From: Uladzislau Rezki <urezki@...il.com>
To: Christian König <christian.koenig@....com>
Cc: Uladzislau Rezki <urezki@...il.com>,
"Alex Xu (Hello71)" <alex_y_xu@...oo.ca>,
wireguard@...ts.zx2c4.com, "Jason A. Donenfeld" <Jason@...c4.com>,
Joel Fernandes <joel@...lfernandes.org>, paulmck@...nel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Xinhui.Pan@....com, linux-kernel@...r.kernel.org,
amd-gfx@...ts.freedesktop.org,
Suren Baghdasaryan <surenb@...gle.com>, rcu@...r.kernel.org,
Hridya Valsaraju <hridya@...gle.com>,
Arve Hjønnevåg <arve@...roid.com>,
Theodore Ts'o <tytso@....edu>, alexander.deucher@....com,
Todd Kjos <tkjos@...roid.com>, uladzislau.rezki@...y.com,
Martijn Coenen <maco@...roid.com>,
Christian Brauner <christian@...uner.io>
Subject: Re: CONFIG_ANDROID (was: rcu_sched detected expedited stalls in
amdgpu after suspend)
Hello.
On Mon, Jul 04, 2022 at 01:30:50PM +0200, Christian König wrote:
> Hi guys,
>
> Am 28.06.22 um 22:11 schrieb Uladzislau Rezki:
> > > Excerpts from Paul E. McKenney's message of June 28, 2022 2:54 pm:
> > > > All you need to do to get the previous behavior is to add something like
> > > > this to your defconfig file:
> > > >
> > > > CONFIG_RCU_EXP_CPU_STALL_TIMEOUT=21000
> > > >
> > > > Any reason why this will not work for you?
>
> sorry for jumping in so later, I was on vacation for a week.
>
> Well when any RCU period is longer than 20ms and amdgpu in the backtrace my
> educated guess is that we messed up some timeout waiting for the hw.
>
> We usually do wait a few us, but it can be that somebody is waiting for ms
> instead.
>
> So there are some todos here as far as I can see and It would be helpful to
> get a cleaner backtrace if possible.
>
Actually CONFIG_ANDROID looks like is going to be removed, so the CONFIG_RCU_EXP_CPU_STALL_TIMEOUT
will not have any dependencies on the CONFIG_ANDROID anymore:
https://lkml.org/lkml/2022/6/29/756
--
Uladzislau Rezki
Powered by blists - more mailing lists