* [PATCH] Documentation: Clarify better about the rwsem non-owner release issue
@ 2020-03-22 2:19 Joel Fernandes (Google)
2020-03-22 6:51 ` Kalle Valo
0 siblings, 1 reply; 5+ messages in thread
From: Joel Fernandes (Google) @ 2020-03-22 2:19 UTC (permalink / raw)
To: linux-kernel
Cc: linux-doc, Peter Zijlstra, Sebastian Andrzej Siewior, netdev,
Joel Fernandes (Google),
Will Deacon, Thomas Gleixner, Davidlohr Bueso, Arnd Bergmann,
Jonathan Corbet, Ingo Molnar, Ingo Molnar, Paul E . McKenney,
linuxppc-dev, Steven Rostedt, Bjorn Helgaas, Kurt Schwemmer,
linux-usb@vger.kernel.org Kalle Valo,
linux-pci@vger.kernel.org Felipe Balbi, Logan Gunthorpe,
Randy Dunlap, linux-wireless, Oleg Nesterov, Greg Kroah-Hartman,
Linus Torvalds, David S. Miller
Reword and clarify better about the rwsem non-owner release issue.
Link: https://lore.kernel.org/linux-pci/20200321212144.GA6475@google.com/
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
Documentation/locking/locktypes.rst | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/Documentation/locking/locktypes.rst b/Documentation/locking/locktypes.rst
index 6f2c0f5b041e..656dce72f11f 100644
--- a/Documentation/locking/locktypes.rst
+++ b/Documentation/locking/locktypes.rst
@@ -292,7 +292,7 @@ implementations to provide priority inheritance for all lock types except
the truly spinning ones. Priority inheritance on ownerless locks is
obviously impossible.
-For now the rwsem non-owner release excludes code which utilizes it from
-being used on PREEMPT_RT enabled kernels. In same cases this can be
-mitigated by disabling portions of the code, in other cases the complete
-functionality has to be disabled until a workable solution has been found.
+For now, a PREEMPT_RT kernel just disables code sections that perform a
+non-owner release of an rwsem. In some cases, parts of the code are disabled.
+In other cases, the complete functionality has to be disabled until a workable
+solution has been found.
--
2.25.1.696.g5e7596f4ac-goog
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] Documentation: Clarify better about the rwsem non-owner release issue
2020-03-22 2:19 [PATCH] Documentation: Clarify better about the rwsem non-owner release issue Joel Fernandes (Google)
@ 2020-03-22 6:51 ` Kalle Valo
2020-03-23 18:23 ` Joel Fernandes
0 siblings, 1 reply; 5+ messages in thread
From: Kalle Valo @ 2020-03-22 6:51 UTC (permalink / raw)
To: Joel Fernandes (Google)
Cc: linux-doc, Peter Zijlstra, Sebastian Andrzej Siewior,
linux-kernel, netdev, Will Deacon, Thomas Gleixner,
Davidlohr Bueso, Arnd Bergmann, Jonathan Corbet, Ingo Molnar,
Ingo Molnar, Paul E . McKenney, Steven Rostedt, Bjorn Helgaas,
Kurt Schwemmer, linux-pci@vger.kernel.org Felipe Balbi,
.ozlabs.org, Logan Gunthorpe, Randy Dunlap, linux-wireless,
Oleg Nesterov, linuxppc-dev, Greg Kroah-Hartman, Linus Torvalds,
David S. Miller
"Joel Fernandes (Google)" <joel@joelfernandes.org> writes:
> Reword and clarify better about the rwsem non-owner release issue.
>
> Link: https://lore.kernel.org/linux-pci/20200321212144.GA6475@google.com/
>
> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
There's something wrong with your linux-pci and linux-usb addresses:
"linux-pci@vger.kernel.org Felipe Balbi" <balbi@kernel.org>,
"linux-usb@vger.kernel.org Kalle Valo" <kvalo@codeaurora.org>,
--
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] Documentation: Clarify better about the rwsem non-owner release issue
2020-03-22 6:51 ` Kalle Valo
@ 2020-03-23 18:23 ` Joel Fernandes
2020-03-24 8:15 ` Will Deacon
0 siblings, 1 reply; 5+ messages in thread
From: Joel Fernandes @ 2020-03-23 18:23 UTC (permalink / raw)
To: Kalle Valo
Cc: linux-doc, Peter Zijlstra, Sebastian Andrzej Siewior,
linux-kernel, netdev, Will Deacon, Thomas Gleixner,
Davidlohr Bueso, Arnd Bergmann, Jonathan Corbet, Ingo Molnar,
Ingo Molnar, Paul E . McKenney, linuxppc-dev, Steven Rostedt,
Bjorn Helgaas, Kurt Schwemmer,
linux-pci@vger.kernel.org Felipe Balbi, Logan Gunthorpe,
Randy Dunlap, linux-wireless, Oleg Nesterov, Greg Kroah-Hartman,
Linus Torvalds, David S. Miller
On Sun, Mar 22, 2020 at 08:51:15AM +0200, Kalle Valo wrote:
> "Joel Fernandes (Google)" <joel@joelfernandes.org> writes:
>
> > Reword and clarify better about the rwsem non-owner release issue.
> >
> > Link: https://lore.kernel.org/linux-pci/20200321212144.GA6475@google.com/
> >
> > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
>
> There's something wrong with your linux-pci and linux-usb addresses:
>
> "linux-pci@vger.kernel.org Felipe Balbi" <balbi@kernel.org>,
>
>
> "linux-usb@vger.kernel.org Kalle Valo" <kvalo@codeaurora.org>,
Not sure. It appears fine in the archive. Thomas, let me know if you wanted
me to resend the diff patch. Hopefully it squashed fine into your original
patch.
thanks,
- Joel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] Documentation: Clarify better about the rwsem non-owner release issue
2020-03-23 18:23 ` Joel Fernandes
@ 2020-03-24 8:15 ` Will Deacon
2020-03-24 18:26 ` Joel Fernandes
0 siblings, 1 reply; 5+ messages in thread
From: Will Deacon @ 2020-03-24 8:15 UTC (permalink / raw)
To: Joel Fernandes
Cc: linux-doc, Peter Zijlstra, Sebastian Andrzej Siewior,
linux-kernel, Thomas Gleixner, Davidlohr Bueso, Arnd Bergmann,
Jonathan Corbet, Ingo Molnar, Linus Torvalds, Ingo Molnar,
Paul E . McKenney, linuxppc-dev, Steven Rostedt, Bjorn Helgaas,
Kurt Schwemmer, Kalle Valo,
linux-pci@vger.kernel.org Felipe Balbi, Greg Kroah-Hartman,
Randy Dunlap, linux-wireless, Oleg Nesterov, netdev,
Logan Gunthorpe, David S. Miller
On Mon, Mar 23, 2020 at 02:23:49PM -0400, Joel Fernandes wrote:
> On Sun, Mar 22, 2020 at 08:51:15AM +0200, Kalle Valo wrote:
> > "Joel Fernandes (Google)" <joel@joelfernandes.org> writes:
> >
> > > Reword and clarify better about the rwsem non-owner release issue.
> > >
> > > Link: https://lore.kernel.org/linux-pci/20200321212144.GA6475@google.com/
> > >
> > > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> >
> > There's something wrong with your linux-pci and linux-usb addresses:
> >
> > "linux-pci@vger.kernel.org Felipe Balbi" <balbi@kernel.org>,
> >
> >
> > "linux-usb@vger.kernel.org Kalle Valo" <kvalo@codeaurora.org>,
>
> Not sure. It appears fine in the archive.
Hmm, I don't think it does. Here's the copy from LKML:
https://lore.kernel.org/lkml/20200322021938.175736-1-joel@joelfernandes.org/
Which works because it's in the To: correctly. But both linux-pci and
linux-usb were *not* CC'd:
"linux-usb@vger.kernel.org Kalle Valo" <kvalo@codeaurora.org>
"linux-pci@vger.kernel.org Felipe Balbi" <balbi@kernel.org>
and searching for the message in the linux-pci archives doesn't find it:
https://lore.kernel.org/linux-pci/?q=Reword+and+clarify+better+about+the+rwsem+non-owner+release+issue
So it looks like there is an issue with your mail setup.
Will
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] Documentation: Clarify better about the rwsem non-owner release issue
2020-03-24 8:15 ` Will Deacon
@ 2020-03-24 18:26 ` Joel Fernandes
0 siblings, 0 replies; 5+ messages in thread
From: Joel Fernandes @ 2020-03-24 18:26 UTC (permalink / raw)
To: Will Deacon
Cc: linux-doc, Peter Zijlstra, Sebastian Andrzej Siewior,
linux-kernel, Thomas Gleixner, Davidlohr Bueso, Arnd Bergmann,
Jonathan Corbet, Ingo Molnar, Linus Torvalds, Ingo Molnar,
Paul E . McKenney, linuxppc-dev, Steven Rostedt, Bjorn Helgaas,
Kurt Schwemmer, Kalle Valo,
linux-pci@vger.kernel.org Felipe Balbi, Greg Kroah-Hartman,
Randy Dunlap, linux-wireless, Oleg Nesterov, netdev,
Logan Gunthorpe, David S. Miller
On Tue, Mar 24, 2020 at 08:15:39AM +0000, Will Deacon wrote:
> On Mon, Mar 23, 2020 at 02:23:49PM -0400, Joel Fernandes wrote:
> > On Sun, Mar 22, 2020 at 08:51:15AM +0200, Kalle Valo wrote:
> > > "Joel Fernandes (Google)" <joel@joelfernandes.org> writes:
> > >
> > > > Reword and clarify better about the rwsem non-owner release issue.
> > > >
> > > > Link: https://lore.kernel.org/linux-pci/20200321212144.GA6475@google.com/
> > > >
> > > > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> > >
> > > There's something wrong with your linux-pci and linux-usb addresses:
> > >
> > > "linux-pci@vger.kernel.org Felipe Balbi" <balbi@kernel.org>,
> > >
> > >
> > > "linux-usb@vger.kernel.org Kalle Valo" <kvalo@codeaurora.org>,
> >
> > Not sure. It appears fine in the archive.
>
> Hmm, I don't think it does. Here's the copy from LKML:
>
> https://lore.kernel.org/lkml/20200322021938.175736-1-joel@joelfernandes.org/
>
> Which works because it's in the To: correctly. But both linux-pci and
> linux-usb were *not* CC'd:
>
> "linux-usb@vger.kernel.org Kalle Valo" <kvalo@codeaurora.org>
> "linux-pci@vger.kernel.org Felipe Balbi" <balbi@kernel.org>
>
> and searching for the message in the linux-pci archives doesn't find it:
>
> https://lore.kernel.org/linux-pci/?q=Reword+and+clarify+better+about+the+rwsem+non-owner+release+issue
>
> So it looks like there is an issue with your mail setup.
Hi Will and Kalle,
Thank you for confirming it. You are right, the archive shows the issue. I
will double check my client and see what's going on.
thanks,
- Joel
^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-03-22 2:19 [PATCH] Documentation: Clarify better about the rwsem non-owner release issue Joel Fernandes (Google)
2020-03-22 6:51 ` Kalle Valo
2020-03-23 18:23 ` Joel Fernandes
2020-03-24 8:15 ` Will Deacon
2020-03-24 18:26 ` Joel Fernandes
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