linux-kernel - Re: [PATCH 20/26 v5] seq_buf: Add seq_buf_can

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Message-ID: <20141117213755.09285299@gandalf.local.home>
Date:	Mon, 17 Nov 2014 21:37:55 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>, Petr Mladek <pmladek@...e.cz>
Subject: Re: [PATCH 20/26 v5] seq_buf: Add seq_buf_can_fit() helper function

On Mon, 17 Nov 2014 17:48:37 -0800
Joe Perches <joe@...ches.com> wrote:

> On Mon, 2014-11-17 at 20:24 -0500, Steven Rostedt wrote:
> > On Mon, 17 Nov 2014 17:07:58 -0800
> > Joe Perches <joe@...ches.com> wrote:
> > > > Look at the next patch.
> > > I don't have it and you are not cc'ing me.
> > It's on LKML.
> 
> And?  There's no convenient way to retrieve it.

You're not subscribed?

> > Um, that may be the case for seq_file, but it is not the case for
> > trace_seq. seq_buf is influenced by seq_file because I have a patch to
> > make seq_file use it, but it's also the guts of trace_seq that has some
> > different requirements. And it's also not the case with the users of
> > seq_buf in the last patch.
> 
> I think your patch subject description needs expanding.
> It says seq_buf, nothing about trace.

It doesn't need to. This helps out the code. seq_buf has nothing to do
with seq_file (yet).

> 
> Perhaps making trace use seq internals is not the right
> thing to do.

But this code comes from the trace_seq internals. It's a way to combine
the code between seq_file and trace_seq. It is influenced by seq_file,
but the code is trace_seq. Actually, this patch set has nothing to do
with seq_file and finishes up solving a problem with printks dump
stacks from NMIs.

Look at the path of the seq_buf.c code.

> 
> I also think you should break up this perhaps overlarge
> patch set into multiple independent sets that can be applied
> in separate chucks rather than all at once.
> 

Why? I'm the one that is maintaining it. It's going to go through my
tree and it has almost all the acks I need.

I will say the first 13 patches have already been acked and reviewed,
and are going to be going into my for-next queue soon. I'll be posting
a smaller set with the patches that changed.

Well, all but the last 3 patches. Those are the ones that I'm going to
work with Linus and Andrew on before I pull them into my tree.

-- Steve

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