Date: Tue, 10 Mar 2009 21:25:47 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: "Sean C. Farley" <scf@FreeBSD.org> Cc: freebsd-emulation@FreeBSD.org Subject: Re: How to config timezone of linux_base-f8 Message-ID: <20090310212547.00004fcd@unknown> In-Reply-To: <alpine.BSF.2.00.0903101324440.24001@thor.farley.org> References: <49B48FC3.70105@ongs.co.jp> <80900349@bb.ipt.ru> <49B5DE6E.6030905@ongs.co.jp> <11308704@bb.ipt.ru> <20090310085518.19936d06a3qyy2w4@webmail.leidinger.net> <alpine.BSF.2.00.0903101324440.24001@thor.farley.org>
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On Tue, 10 Mar 2009 13:34:45 -0500 (CDT) "Sean C. Farley" <scf@FreeBSD.org> wrote: > On Tue, 10 Mar 2009, Alexander Leidinger wrote: > > *snip* > > >> It's on my TODO list but not the first one. ATM I'm working on new > >> linux infrastructure ports. And as always patches are welcome. ;-) > > > > I want to add that there's still hope that the timezone stuff in > > -current gets updated soonish (which means we don't need tzdata in > > f8, as 7.1 will not switch to f8 by default as it would 1. violate > > POLA and 2. does not have the necessary emulation stuff to be > > compatible with 2.6.16). > > Out of curiosity, when you say necessary emulation stuff to be > compatible with 2.6.16, how compatible is it? I use it on 7-STABLE > quite well with Skype and Acroread8, somewhat well with Flash plugin > 9 and not well at all with linux-ut (at least with the nvidia driver). I would say it is compatible enough to run Skype Acroread8 and a little bit of Flash... ;-) What is missing is for example the *at() funktions. Soon there will be a different futex implementation in -current. There may be more which escapes my memory ATM. > Will all that is necessary to use full 2.6.16 emulation be eventually > MFC'd, or will only some of it? Of course, keeping the default at > 2.4.2 emulation is perfectly fine. The *at() stuff can not be MFCed, as it depends upon VFS stuff which will not be MFCed due to API/ABI concerns. The futex stuff can maybe MFCed, but I don't really know. > On a related note, would it be possible to be able to run one > application under 2.4.2 emulation while another is under 2.6.16 in > the future? I thought it may help in some situations. There could > be a /compat/linux.f8 (with /compat/linux linking to it) and > /compat/linux.fc4 where the application can be told via an > environment variable to use a specific install. Currently it's either 2.4 or 2.6 (don't switch while a linux process is (still) running), and with the current implementation I don't really see an easy way to do this. Someone could make a copy of the current linuxulator and use a different ELF-brand for the copy. The copy would then have to be modified to use a different path for the linux base, and every non-static function/symbol would need to be renamed. Praktically I would say too much work, not enough return of investment. Would be cool to have from a geeky point, but if you really _need_ this (business stuff instead of "I would like to"), take an older version of FreeBSD and let it run on another machine. Bye, Alexander.
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