Date: Sat, 7 Aug 2010 14:18:33 +0100 (BST) From: Gavin Atkinson <gavin@FreeBSD.org> To: Kostik Belousov <kostikbel@gmail.com> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r210923 - in head/sys: fs/devfs kern sys vm Message-ID: <alpine.LNX.2.00.1008071415040.21554@ury.york.ac.uk> In-Reply-To: <20100806184950.GR22295@deviant.kiev.zoral.com.ua> References: <201008060942.o769gFm2075268@svn.freebsd.org> <1281109176.68747.2.camel@buffy.york.ac.uk> <20100806184950.GR22295@deviant.kiev.zoral.com.ua>
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On Fri, 6 Aug 2010, Kostik Belousov wrote: > On Fri, Aug 06, 2010 at 04:39:36PM +0100, Gavin Atkinson wrote: > > On Fri, 2010-08-06 at 09:42 +0000, Konstantin Belousov wrote: > > > Author: kib > > > Date: Fri Aug 6 09:42:15 2010 > > > New Revision: 210923 > > > URL: http://svn.freebsd.org/changeset/base/210923 > > > > > > Log: > > > Add new make_dev_p(9) flag MAKEDEV_ETERNAL to inform devfs that created > > > cdev will never be destroyed. Propagate the flag to devfs vnodes as > > > VV_ETERNVALDEV. Use the flags to avoid acquiring devmtx and taking a > > > thread reference on such nodes. > > > > Does this flag have any effect on unmounting a devfs mount? > > It should not. The flag turns off some safety measures that are used > to make sure that cdev is not destroyed while cdevsw method is active. OK, thanks. > Do you experience some trouble after the change ? I've not seen any problems, I was just wanting to check that I understood the exact meaning of this flag. Thanks, Gavin
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