lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <20101020161455.GC24313@sci.fi> Date: Wed, 20 Oct 2010 19:14:55 +0300 From: Ville Syrjälä <syrjala@....fi> To: Dave Airlie <airlied@...il.com> Cc: Arnd Bergmann <arnd@...db.de>, Jan Kara <jack@...e.cz>, Greg KH <greg@...ah.com>, Anders Larsen <al@...rsen.net>, dri-devel@...ts.freedesktop.org, ksummit-2010-discuss@...ts.linux-foundation.org, Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>, codalist@...emann.coda.cs.cmu.edu, Theodore Kilgore <kilgota@...ach.math.auburn.edu>, Bryan Schumaker <bjschuma@...app.com>, Christoph Hellwig <hch@...radead.org>, Petr Vandrovec <vandrove@...cvut.cz>, Arnaldo Carvalho de Melo <acme@...stprotocols.net>, linux-media@...r.kernel.org, Samuel Ortiz <samuel@...tiz.org>, Evgeniy Dushistov <dushistov@...l.ru>, Steven Rostedt <rostedt@...dmis.org>, autofs@...ux.kernel.org, Jan Harkes <jaharkes@...cmu.edu>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, Andrew Hendry <andrew.hendry@...il.com> Subject: Re: [Ksummit-2010-discuss] [v2] Remaining BKL users, what to do On Wed, Oct 20, 2010 at 06:50:58AM +1000, Dave Airlie wrote: > On Tue, Oct 19, 2010 at 11:26 PM, Arnd Bergmann <arnd@...db.de> wrote: > > On Tuesday 19 October 2010, Arnd Bergmann wrote: > >> On Tuesday 19 October 2010 06:52:32 Dave Airlie wrote: > >> > > I might be able to find some hardware still lying around here that uses an > >> > > i810. Not sure unless I go hunting it. But I get the impression that if > >> > > the kernel is a single-CPU kernel there is not any problem anyway? Don't > >> > > distros offer a non-smp kernel as an installation option in case the user > >> > > needs it? So in reality how big a problem is this? > >> > > >> > Not anymore, which is my old point of making a fuss. Nowadays in the > >> > modern distro world, we supply a single kernel that can at runtime > >> > decide if its running on SMP or UP and rewrite the text section > >> > appropriately with locks etc. Its like magic, and something like > >> > marking drivers as BROKEN_ON_SMP at compile time is really wrong when > >> > what you want now is a runtime warning if someone tries to hotplug a > >> > CPU with a known iffy driver loaded or if someone tries to load the > >> > driver when we are already in SMP mode. > >> > >> We could make the driver run-time non-SMP by adding > >> > >> if (num_present_cpus() > 1) { > >> pr_err("i810 no longer supports SMP\n"); > >> return -EINVAL; > >> } > >> > >> to the init function. That would cover the vast majority of the > >> users of i810 hardware, I guess. > > > > Some research showed that Intel never support i810/i815 SMP setups, > > but there was indeed one company (http://www.acorpusa.com at the time, > > now owned by a domain squatter) that made i815E based dual Pentium-III > > boards like this one: http://cgi.ebay.com/280319795096 > > Also that board has no on-board GPU enabled i815EP (P means no on-board GPU). A quick search seems to indicate that an i815E variant also existed. -- Ville Syrjälä syrjala@....fi http://www.sci.fi/~syrjala/ -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists