Date: Wed, 8 Aug 2012 19:42:24 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Ed Schouten <ed@80386.nl> Cc: Konstantin Belousov <kostikbel@gmail.com>, freebsd-current@freebsd.org Subject: Re: ttydev_cdevsw has no d_purge Message-ID: <201208081942.24619.hselasky@c2i.net> In-Reply-To: <CAJOYFBD4DxL8ZAeKDYZwtv2FaqcV0Taw%2BLES5nc6Ry_t%2BuzfOw@mail.gmail.com> References: <20120801160323.GN2676@deviant.kiev.zoral.com.ua> <201208081827.53824.hselasky@c2i.net> <CAJOYFBD4DxL8ZAeKDYZwtv2FaqcV0Taw%2BLES5nc6Ry_t%2BuzfOw@mail.gmail.com>
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On Wednesday 08 August 2012 19:24:18 Ed Schouten wrote: > 2012/8/8 Hans Petter Selasky <hselasky@c2i.net>: > >> I have a question regarding the changed fragment of code. Why don't you > >> use unr(9) KPI to manage unit numbers ? > > > > Probably I could, but right now the unr interface doesn't support pending > > unit free which I need for other reasons, see below. > > What does `pending unit free' mean? I also would prefer it if you used > unr(9) -- not just here, but across the entire USB stack. It is like a drain state, where a unit is collected for free, and then committed to free state when the tsw_free() is called. In the [unlocked] time in between the unit cannot be re-used. --HPS
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