From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Andi Kleen <andi@firstfloor.org>
Cc: Kyle Moffett <kyle@moffetthome.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
"H. Peter Anvin" <hpa@zytor.com>,
LKML <linux-kernel@vger.kernel.org>,
"H.J. Lu" <hjl.tools@gmail.com>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: RFD: x32 ABI system call numbers
Date: Tue, 30 Aug 2011 10:56:37 +0100 [thread overview]
Message-ID: <20110830105637.35f9e46e@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <m2ty8znzoz.fsf@firstfloor.org>
> > The only programs which really care are those which map many gigs
> > of stuff into memory (IE: big databases, etc).
>
> You mean anything that mmaps a file?
> 2-3GB is not a whole lot these days.
For most stuff its a lot, and most apps that mmap files mmap the bits
they need. O_LARGEFILE and 64bit time_t do make sense though.
> 2Gb is a very similar thing as Linus y2038, just you're much more
> likely to hit it.
Also if using a 64bit time_t means less compat gunge it makes things much
easier. At that point 32bit time_t becomes a userspace/library thunking
problen.
> IMHO the only excuse right now for 32bit is to use it in a JIT
> that can dynamically expand the pointer. Or for old binaries.
Or for a lot of code which runs way faster in 32bit pointer mode. Less
memory, smaller cache footprint.
Alan
next prev parent reply other threads:[~2011-08-30 9:58 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-26 23:00 H. Peter Anvin
2011-08-26 23:13 ` Linus Torvalds
2011-08-26 23:39 ` H. Peter Anvin
2011-08-27 0:36 ` Linus Torvalds
2011-08-27 0:43 ` Linus Torvalds
2011-08-27 0:53 ` H. Peter Anvin
2011-08-27 1:18 ` Linus Torvalds
2011-08-27 1:35 ` H. Peter Anvin
2011-08-27 1:45 ` Linus Torvalds
2011-08-27 1:12 ` H. Peter Anvin
2011-08-27 1:42 ` Linus Torvalds
2011-08-29 19:01 ` Geert Uytterhoeven
2011-08-29 19:03 ` H. Peter Anvin
2011-08-30 1:17 ` Ted Ts'o
2011-08-30 1:48 ` Linus Torvalds
2011-08-30 2:16 ` Kyle Moffett
2011-08-30 4:45 ` H. Peter Anvin
2011-08-30 7:06 ` Geert Uytterhoeven
2011-08-30 12:18 ` Arnd Bergmann
2011-08-30 7:09 ` Andi Kleen
2011-08-30 9:56 ` Alan Cox [this message]
2011-08-30 7:00 ` Geert Uytterhoeven
2011-09-20 18:37 ` Jan Engelhardt
2011-09-06 20:40 ` Florian Weimer
2011-08-27 0:57 ` H. Peter Anvin
2011-08-27 4:40 ` Christoph Hellwig
2011-08-29 15:04 ` Arnd Bergmann
2011-08-29 18:31 ` H. Peter Anvin
2011-08-30 12:09 ` Arnd Bergmann
2011-08-30 16:35 ` H. Peter Anvin
2011-08-31 16:14 ` Arnd Bergmann
2011-08-31 16:25 ` H. Peter Anvin
2011-08-31 16:39 ` Arnd Bergmann
2011-08-31 16:48 ` Linus Torvalds
2011-08-31 19:18 ` Arnd Bergmann
2011-08-31 19:44 ` H. Peter Anvin
2011-08-31 19:54 ` Alan Cox
2011-08-31 20:02 ` H. Peter Anvin
2011-08-31 20:55 ` Arnd Bergmann
2011-08-31 20:58 ` H. Peter Anvin
2011-08-31 19:49 ` Geert Uytterhoeven
2011-08-31 16:46 ` Linus Torvalds
2011-08-31 17:05 ` H.J. Lu
2011-09-03 2:56 ` H.J. Lu
2011-09-03 3:04 ` Linus Torvalds
2011-09-03 4:02 ` H.J. Lu
2011-09-03 4:29 ` H. Peter Anvin
2011-09-03 4:44 ` H.J. Lu
2011-09-03 5:16 ` H. Peter Anvin
2011-09-03 14:11 ` H.J. Lu
2011-09-03 5:29 ` H. Peter Anvin
2011-09-03 8:41 ` Arnd Bergmann
2011-09-03 14:04 ` Valdis.Kletnieks
2011-09-03 16:40 ` H. Peter Anvin
2011-09-03 17:16 ` Valdis.Kletnieks
2011-09-03 17:22 ` H.J. Lu
2011-09-03 17:28 ` H. Peter Anvin
2011-09-03 17:27 ` H. Peter Anvin
2011-09-04 13:51 ` Valdis.Kletnieks
2011-09-04 15:17 ` Arnd Bergmann
2011-09-04 17:08 ` Linus Torvalds
2011-09-04 18:40 ` H.J. Lu
2011-09-04 19:06 ` Arnd Bergmann
2011-09-04 19:31 ` H.J. Lu
2011-09-04 21:13 ` Arnd Bergmann
2011-09-04 21:25 ` H.J. Lu
2011-09-04 21:41 ` Arnd Bergmann
2011-09-04 22:13 ` H.J. Lu
2011-09-05 7:48 ` Arnd Bergmann
2011-09-05 15:11 ` H.J. Lu
2011-09-05 17:21 ` Arnd Bergmann
2011-09-05 19:34 ` H.J. Lu
2011-09-05 19:54 ` H.J. Lu
2011-09-05 19:59 ` H. Peter Anvin
2011-09-05 20:27 ` Arnd Bergmann
2011-09-09 21:02 ` H.J. Lu
2011-09-04 20:11 ` H. Peter Anvin
2011-09-04 19:31 ` richard -rw- weinberger
2011-09-04 19:32 ` H.J. Lu
2011-09-03 14:15 ` H.J. Lu
2011-08-31 17:09 ` H. Peter Anvin
2011-08-31 17:19 ` Linus Torvalds
2011-08-31 17:38 ` H. Peter Anvin
2011-09-01 11:35 ` Arnd Bergmann
2011-10-01 19:38 ` Jonas Bonn
2012-02-08 21:36 ` 64-bit time on 32-bit systems H. Peter Anvin
2011-09-01 13:30 ` RFD: x32 ABI system call numbers Avi Kivity
2011-09-01 14:13 ` H. Peter Anvin
2011-09-02 0:49 ` Pedro Alves
2011-09-02 1:51 ` H. Peter Anvin
2011-09-02 8:02 ` Arnd Bergmann
2011-09-02 8:42 ` Pedro Alves
2011-09-01 6:08 ` Jonas Bonn
2011-09-02 6:17 ` Andy Lutomirski
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