From mboxrd@z Thu Jan  1 00:00:00 1970
From: Octavian Purdila <opurdila@ixiacom.com>
Subject: Re: [Patch 2/3] sysctl: add proc_do_large_bitmap
Date: Fri, 9 Apr 2010 15:35:38 +0300
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Cc: Amerigo Wang <amwang@redhat.com>, linux-kernel@vger.kernel.org,
	ebiederm@xmission.com, Eric Dumazet <eric.dumazet@gmail.com>,
	netdev@vger.kernel.org, Neil Horman <nhorman@tuxdriver.com>,
	David Miller <davem@davemloft.net>
To: Changli Gao <xiaosuo@gmail.com>
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On Friday 09 April 2010 13:33:29 you wrote:
> On Fri, Apr 9, 2010 at 6:11 PM, Amerigo Wang <amwang@redhat.com> wrote:
> > From: Octavian Purdila <opurdila@ixiacom.com>
> >
> > The new function can be used to read/write large bitmaps via /proc. A
> > comma separated range format is used for compact output and input
> > (e.g. 1,3-4,10-10).
> >
> > Writing into the file will first reset the bitmap then update it
> > based on the given input.
> 
> We have bitmap_scnprintf() and bitmap_parse_user(), why invent a new suite?
> 

A decimal comma separated ranges seems the best option for this feature, and 
unfortunately both of the above functions only support hexadecimal and no 
ranges.