linux-kernel - Re: [PATCHv3 3/3] kernel: add sysfs documentation for live patching

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Date:	Fri, 21 Nov 2014 10:41:48 -0600
From:	Seth Jennings <sjenning@...hat.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Josh Poimboeuf <jpoimboe@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Vojtech Pavlik <vojtech@...e.cz>,
	Steven Rostedt <rostedt@...dmis.org>,
	Petr Mladek <pmladek@...e.cz>, Miroslav Benes <mbenes@...e.cz>,
	Christoph Hellwig <hch@...radead.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	live-patching@...r.kernel.org, x86@...nel.org, kpatch@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 3/3] kernel: add sysfs documentation for live patching

On Fri, Nov 21, 2014 at 11:49:46AM +0900, Masami Hiramatsu wrote:
> (2014/11/21 7:29), Seth Jennings wrote:
> > Adds sysfs interface documentation to Documentation/ABI/testing/
> > 
> 
> Hmm, is there any reason to decouple this documentation from code patch?
> I think we'd better merge this to 2/3, or move sysfs interface code from 2/3 to this.

Good point.  I'll collapse this into 2/3 for v4.

Thanks,
Seth

> 
> Thank you,
> 
> > Signed-off-by: Seth Jennings <sjenning@...hat.com>
> > ---
> >  Documentation/ABI/testing/sysfs-kernel-livepatch | 44 ++++++++++++++++++++++++
> >  MAINTAINERS                                      |  1 +
> >  2 files changed, 45 insertions(+)
> >  create mode 100644 Documentation/ABI/testing/sysfs-kernel-livepatch
> > 
> > diff --git a/Documentation/ABI/testing/sysfs-kernel-livepatch b/Documentation/ABI/testing/sysfs-kernel-livepatch
> > new file mode 100644
> > index 0000000..5bf42a8
> > --- /dev/null
> > +++ b/Documentation/ABI/testing/sysfs-kernel-livepatch
> > @@ -0,0 +1,44 @@
> > +What:		/sys/kernel/livepatch
> > +Date:		Nov 2014
> > +KernelVersion:	3.19.0
> > +Contact:	live-patching@...r.kernel.org
> > +Description:
> > +		Interface for kernel live patching
> > +
> > +		The /sys/kernel/livepatch directory contains subdirectories for
> > +		each loaded live patch module.
> > +
> > +What:		/sys/kernel/livepatch/<patch>
> > +Date:		Nov 2014
> > +KernelVersion:	3.19.0
> > +Contact:	live-patching@...r.kernel.org
> > +Description:
> > +		The patch directory contains subdirectories for each kernel
> > +		object (vmlinux or a module) in which it patched functions.
> > +
> > +What:		/sys/kernel/livepatch/<patch>/enabled
> > +Date:		Nov 2014
> > +KernelVersion:	3.19.0
> > +Contact:	live-patching@...r.kernel.org
> > +Description:
> > +		A writable attribute that indicates whether the patched
> > +		code is currently applied.  Writing 0 will disable the patch
> > +		while writing 1 will re-enable the patch.
> > +
> > +What:		/sys/kernel/livepatch/<patch>/<object>
> > +Date:		Nov 2014
> > +KernelVersion:	3.19.0
> > +Contact:	live-patching@...r.kernel.org
> > +Description:
> > +		The object directory contains subdirectories for each function
> > +		that is patched within the object.
> > +
> > +What:		/sys/kernel/livepatch/<patch>/<object>/<function>
> > +Date:		Nov 2014
> > +KernelVersion:	3.19.0
> > +Contact:	live-patching@...r.kernel.org
> > +Description:
> > +		The function directory contains attributes regarding the
> > +		properties and state of the patched function.
> > +
> > +		There are currently no such attributes.
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index c7f49ae..7985293 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -5725,6 +5725,7 @@ F:	kernel/livepatch/
> >  F:	include/linux/livepatch.h
> >  F:	arch/x86/include/asm/livepatch.h
> >  F:	arch/x86/kernel/livepatch.c
> > +F:	Documentation/ABI/testing/sysfs-kernel-livepatch
> >  L:	live-patching@...r.kernel.org
> >  
> >  LLC (802.2)
> > 
> 
> 
> -- 
> Masami HIRAMATSU
> Software Platform Research Dept. Linux Technology Research Center
> Hitachi, Ltd., Yokohama Research Laboratory
> E-mail: masami.hiramatsu.pt@...achi.com
> 
> 
> --
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