Date: Wed, 16 Sep 2015 16:57:39 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Gleb Smirnoff <glebius@FreeBSD.org> Cc: marcel@FreeBSD.org, Steve Kiernan <stevek@juniper.net>, brooks@FreeBSD.org, current@FreeBSD.org Subject: Re: r286727 breaks geom_md.ko loading Message-ID: <20150916135739.GH67105@kib.kiev.ua> In-Reply-To: <20150916135003.GM1023@glebius.int.ru> References: <20150916000019.GH1023@FreeBSD.org> <20150916051005.GF67105@kib.kiev.ua> <20150916131515.GL1023@glebius.int.ru> <20150916134249.GG67105@kib.kiev.ua> <20150916135003.GM1023@glebius.int.ru>
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On Wed, Sep 16, 2015 at 04:50:03PM +0300, Gleb Smirnoff wrote: > On Wed, Sep 16, 2015 at 04:42:49PM +0300, Konstantin Belousov wrote: > K> On Wed, Sep 16, 2015 at 04:15:15PM +0300, Gleb Smirnoff wrote: > K> > On Wed, Sep 16, 2015 at 08:10:05AM +0300, Konstantin Belousov wrote: > K> > K> > There is regression after r286727. Our dynamic kernel linker doesn't > K> > K> > support weak symbols, so the geom_md.ko can no longer be loaded dynamically > K> > K> > neither from loader nor at runtime. Having it statically in kernel is > K> > K> > the only working option. > K> > K> > K> > K> Perhaps, something could be fixed in the dynamic linker ? > K> > K> > K> > K> I checked both i386 and amd64, and on both arches I can load geom_md.ko. > K> > K> On the other hand, I do not use preloaded mfs images. Can you explain > K> > K> how to reproduce the issue, and what linker is affected ? Note that we > K> > K> have two kernel dynamic linkers, one is used on amd64 and mips, second one > K> > K> is for all other architectures. > K> > > K> > To reproduce you need just a vanilla head, a kernel that doesn't have > K> > 'device md' in it, and run kldload geom_md.ko. Does that work for you? > K> > K> Yes, it does, both on amd64 and i386. You did not said which architecture > K> exposes your problem. Post your kernel config. > > It is amd64. Here is config. > options MD_ROOT # MD is a potential root device It is MD_ROOT which is problematic, it seems. I will take a look into linker.
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