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

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Date:	Mon, 17 Nov 2014 17:07:58 -0800
From:	Joe Perches <joe@...ches.com>
To:	Steven Rostedt <rostedt@...dmis.org>
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, 2014-11-17 at 19:56 -0500, Steven Rostedt wrote:
> On Mon, 17 Nov 2014 16:35:32 -0800
> Joe Perches <joe@...ches.com> wrote:
> 
>  
> > What "logic" does it place in one place and
> > how does it matter?
> 
> Look at the next patch.

I don't have it and you are not cc'ing me.
I think you are getting carried away with the helpers.

> > I don't see it making mistakes more or less
> > likely, I just see it being used to avoid
> > setting the overflow state which seems like
> > more of an error than anything else.
> > 
> > Why avoid setting overflow at all?
[]
> It has nothing to do with overflow. Where did you get that from?

writing to seq_buf really only cares about overflow.

seq_buf -> write to buffer -> overflowed?
expand buffer, redo everything else when finished,
dump buffer

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