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Open Source and information security mailing list archives
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Date: Tue, 09 Dec 2014 09:46:36 +0100 From: Arnd Bergmann <arnd@...db.de> To: Keith Busch <keith.busch@...el.com> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org Subject: Re: [PATCH] misc: Increase available dyanmic minors On Monday 08 December 2014 16:01:50 Keith Busch wrote: > This increases the number of available miscellaneous character device > dynamic minors from 63 to the max minor, 1M. > > Dynamic minor previously started at 63 and went down to zero. That's not > enough in some situations, and also eventually creates a collision with > 'psaux' misc device. This patch starts minors at the last defined misc > minor (255) and works up to the max possible. > > Signed-off-by: Keith Busch <keith.busch@...el.com> I guess this will break support for ancient user space tools, and possibly also old file systems that do not support more than 8-bit minor numbers. I would assume that it's ok, but you definitely have to mention in the changelog that things might break and how you have concluded that this is safe enough. If you cannot come up with a good reasoning, it might be better to combine both and use up the traditional dynamic minor numbers before using the >255 range. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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