* [Qemu-devel] MMU @ 2003-06-27 13:00 Thomas Glanzmann 2003-06-27 14:03 ` Johan Rydberg 2003-06-27 14:40 ` Fabrice Bellard 0 siblings, 2 replies; 4+ messages in thread From: Thomas Glanzmann @ 2003-06-27 13:00 UTC (permalink / raw) To: QEMU Devel What is the future direction of the 'software MMU'? Do you want to make the diff to the original Linux kernel in FIXADDRTOP and co unnecessary? So that it is possible to run a unmodified 'binary' kernel? Gruesse, Thomas ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] MMU 2003-06-27 13:00 [Qemu-devel] MMU Thomas Glanzmann @ 2003-06-27 14:03 ` Johan Rydberg 2003-06-27 14:54 ` Thomas Glanzmann 2003-06-27 14:40 ` Fabrice Bellard 1 sibling, 1 reply; 4+ messages in thread From: Johan Rydberg @ 2003-06-27 14:03 UTC (permalink / raw) To: qemu-devel Thomas Glanzmann <sithglan@stud.uni-erlangen.de> wrote: : What is the future direction of the 'software MMU'? Do you want to make : the diff to the original Linux kernel in FIXADDRTOP and co unnecessary? : So that it is possible to run a unmodified 'binary' kernel? I can not really speak for Fabrice, but with a software MMU there would be no need for any modifications to the Linux kernel. You would expect a slowdown between ~1.2 and ~3 (estimated values), though. -- Johan Rydberg, Free Software Developer, Sweden http://rtmk.sf.net | http://www.nongnu.org/guss/ Playing Queens of the Stone Age - regular john ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] MMU 2003-06-27 14:03 ` Johan Rydberg @ 2003-06-27 14:54 ` Thomas Glanzmann 0 siblings, 0 replies; 4+ messages in thread From: Thomas Glanzmann @ 2003-06-27 14:54 UTC (permalink / raw) To: qemu-devel > I can not really speak for Fabrice, but with a software MMU there would > be no need for any modifications to the Linux kernel. You would expect > a slowdown between ~1.2 and ~3 (estimated values), though. That sound really good. Next step could be to let windows run. :-) Greetings, Thomas ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] MMU 2003-06-27 13:00 [Qemu-devel] MMU Thomas Glanzmann 2003-06-27 14:03 ` Johan Rydberg @ 2003-06-27 14:40 ` Fabrice Bellard 1 sibling, 0 replies; 4+ messages in thread From: Fabrice Bellard @ 2003-06-27 14:40 UTC (permalink / raw) To: qemu-devel Thomas Glanzmann wrote: > What is the future direction of the 'software MMU'? Do you want to make > the diff to the original Linux kernel in FIXADDRTOP and co unnecessary? > > So that it is possible to run a unmodified 'binary' kernel? Yes, the software MMU will enable the use of unmodified Linux kernels (and other OSes), at the expense of a slower emulation (benchmarks show a slowdown of a factor 2). Fabrice. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-06-27 15:02 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2003-06-27 13:00 [Qemu-devel] MMU Thomas Glanzmann 2003-06-27 14:03 ` Johan Rydberg 2003-06-27 14:54 ` Thomas Glanzmann 2003-06-27 14:40 ` Fabrice Bellard
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