From: Giuliano Pochini <pochini@shiny.it>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org, linuxppc64-dev@ozlabs.org
Subject: Re: Starting the arch/powerpc merge
Date: Fri, 21 Oct 2005 09:19:08 +0200 (CEST) [thread overview]
Message-ID: <XFMail.20051021091908.pochini@shiny.it> (raw)
In-Reply-To: <17221.45591.341270.888791@cargo.ozlabs.ibm.com>
On 06-Oct-2005 Paul Mackerras wrote:
>> Out of curiosity, is there any advantage in using a 32 bits
>> kernel on ppc64 over a 64 bits kernel ? Speed ? Complexity ?
>> Compatibility ? Memory ?
>
> Not really. The main thing in the past has been that DRI with 32-bit
> X server and clients would work with a 32-bit kernel but not a 64-bit
> kernel, but that's fixed now. A 64-bit kernel is faster on most
> lmbench tests. I guess a 32-bit kernel might end up a little smaller,
> but that's the only possible advantage I can think of.
And 32<->64 bits compatibility layer for 32bits apps is not needed,
so maybe they run a bit faster. Well, at this point IMHO 32-on-64
support may be dropped without regrets. Spending time for an useless
thing is - uhm - useless.
> Oops, sorry, mail system breakage here...
My mail wasn't important anyway :))
--
Giuliano.
next prev parent reply other threads:[~2005-10-21 7:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-27 0:25 Starting the arch/powerpc merge Paul Mackerras
2005-09-27 3:39 ` Kumar Gala
2005-09-27 5:38 ` Stephen Rothwell
2005-09-27 9:56 ` Paul Mackerras
2005-09-27 8:23 ` Christoph Hellwig
2005-09-27 8:30 ` Paul Mackerras
2005-09-27 9:16 ` Heikki Lindholm
2005-09-27 9:26 ` Pantelis Antoniou
2005-09-27 9:55 ` Paul Mackerras
2005-09-27 9:51 ` Pantelis Antoniou
2005-09-28 0:05 ` Benjamin Herrenschmidt
2005-09-29 7:20 ` Giuliano Pochini
2005-10-06 23:24 ` Paul Mackerras
2005-10-20 23:01 ` Paul Mackerras
2005-10-21 7:19 ` Giuliano Pochini [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-09-27 15:43 Daniel Ostrow
2005-09-27 16:43 ` Christopher Friesen
2005-09-27 17:29 ` Daniel Ostrow
2005-09-28 0:07 ` Benjamin Herrenschmidt
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