Message-ID: <1336584641.2527.65.camel@twins>
Subject: Re: [RFC][PATCH] printk: Add %pb to print bitmaps
From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Igor Mammedov <imammedo@redhat.com>, Jiang Liu <liuj97@gmail.com>,
        linux-kernel@vger.kernel.org, pjt@google.com, tglx@linutronix.de,
        seto.hidetoshi@jp.fujitsu.com,
        Andrew Morton <akpm@linux-foundation.org>
Date: Wed, 09 May 2012 19:30:41 +0200
In-Reply-To: <20120509172611.GC8135@gmail.com>
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On Wed, 2012-05-09 at 19:26 +0200, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@infradead.org> wrote:
> 
> > > A "%.*pb" is the only interface that can work for a "sized" 
> > > bitmap (with obviously fixed-length ones being possible with 
> > > a "%.32bp" like thing)
> > 
> > Right, sadly that also generates a warning :/
> 
> Why not use what I suggested, %*pb? It also doubles as a width 
> field in essence, as bitmap output is fundamentally fixed width.

The bitmap list output uses RLE and generates things like:

 6-11,18-23

Its the stuff used for all the sched_domain output etc..


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