Date: Thu, 28 Feb 2019 15:54:49 -0700 From: Warner Losh <imp@bsdimp.com> To: Ian Lepore <ian@freebsd.org> Cc: "Conrad E. Meyer" <cem@freebsd.org>, Steve Kargl <sgk@troutmask.apl.washington.edu>, John Baldwin <jhb@freebsd.org>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: r343567 aka PAE vs non-PAE merge breaks i386 freebsd Message-ID: <CANCZdfqJrBswtDhS7tPeQUT-z_WM7jVB_WEv7djjWZa2wdnjgA@mail.gmail.com> In-Reply-To: <55eb26fb977fe90e323a8721e39bfc0185d994ba.camel@freebsd.org> References: <20190222033924.GA25285@troutmask.apl.washington.edu> <20190222060410.GA25817@troutmask.apl.washington.edu> <20190223032644.GA14058@troutmask.apl.washington.edu> <CAG6CVpW7y1qwxeU_gNWGmnKsgUkXKUTnmSwd3O2ByPdo_EO3uw@mail.gmail.com> <20190223163947.GB18805@troutmask.apl.washington.edu> <f38f2329-900b-2ae2-02e6-e1b993f9250a@FreeBSD.org> <20190228183214.GA17372@troutmask.apl.washington.edu> <CAG6CVpWasUzvHv56t8trK_6=wr-o_w4PnNDUir-Ye=kQXofoOQ@mail.gmail.com> <55eb26fb977fe90e323a8721e39bfc0185d994ba.camel@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Feb 28, 2019 at 12:14 PM Ian Lepore <ian@freebsd.org> wrote: > On Thu, 2019-02-28 at 11:06 -0800, Conrad Meyer wrote: > > On Thu, Feb 28, 2019 at 10:32 AM Steve Kargl > > <sgk@troutmask.apl.washington.edu> wrote: > > > This is interesting as well. Does this mean that amd64 is now > > > the only tier 1 platform and all other architectures are after > > > thoughts? > > > > This has been the de facto truth for years. i386 is mostly only > > supported by virtue of sharing code with amd64. There are efforts to > > promote arm64 to Tier 1, but it isn't there yet. Power8+ might be > > another good alternative Tier 1 candidate eventually. None have > > anything like the developer popularity that amd64 enjoys. > > > > > > I have been of the opinion that armv[67] has met all the bullet points > to be a tier-1 arch for several years, but nobody seemed interested in > declaring it so. I concur that armv[67] is the closest thing we have to a second tier 1. arm64 is also quite good, but still has a few more rough edges compared to armv[67]. > Now it'll never happen, because there seems to be > growing momentum to throw everything 32-bit under the bus and declare > freebsd to be a 64-bit-only OS. Netflix wins; those of us building > smaller embedded products will eventually be forced to move to linux. > While there's been some talk, there's too many relevant 32-bit arm chips to toss it out in 13 (planned in 2ish years or 2021) and no i386 in 13 likely would be a stretch as well, so 13 almost certainly will have 32-bit kernels and userland support (though that will require the 32-bit processors support 64-bit atomics to reduce friction). Who know if that will be the case in 4 or 5 years when 14 is branched (so ~2025). Current trends suggest that 32-bits might not be relevant then, but we certainly can't say that for sure today. Warner
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CANCZdfqJrBswtDhS7tPeQUT-z_WM7jVB_WEv7djjWZa2wdnjgA>