From: "H. Peter Anvin" <hpa@zytor.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: klibc@zytor.com, linux-kernel@vger.kernel.org
Subject: Re: sys_mmap2 on different architectures
Date: Wed, 22 Feb 2006 16:05:39 -0800 [thread overview]
Message-ID: <43FCFC53.20505@zytor.com> (raw)
In-Reply-To: <20060222.135430.44726149.davem@davemloft.net>
David S. Miller wrote:
>
> Right.
>
> On sparc32 we had the issue where we had a 8K page size
> platform (sun4) and the rest were using 4K page size.
>
> I can't even think why we do that fixed shift actually. I think Jakub
> Jalinek thought this might be a way to make applications assuming
> 4K page size work on the 8K page size machines.
>
> I'm going to say that you can feel free to fix this to use PAGE_SHIFT
> correctly all the time. Applications should be calling getpagesize()
> and not assume what that value might be.
>
Okay, what I'll do is that I'll hard-code 12 on i386, SPARC and ARM; on
other architectures I'll use getpagesize(). Of course, on 64-bit
architectures this is not an issue; there I just call sys_mmap.
-hpa
next prev parent reply other threads:[~2006-02-23 0:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-22 21:45 sys_mmap2 on different architectures H. Peter Anvin
2006-02-22 21:54 ` David S. Miller
2006-02-22 22:00 ` H. Peter Anvin
2006-02-23 0:05 ` H. Peter Anvin [this message]
2006-02-23 0:40 ` David S. Miller
2006-02-23 0:41 ` David S. Miller
2006-02-23 0:14 ` Benjamin LaHaise
2006-02-23 0:22 ` H. Peter Anvin
2006-02-23 0:43 ` David S. Miller
2006-02-23 0:59 ` H. Peter Anvin
2006-02-23 1:03 ` David S. Miller
2006-02-23 1:06 ` H. Peter Anvin
2006-02-23 17:39 ` Benjamin LaHaise
2006-02-23 17:47 ` H. Peter Anvin
2006-02-23 2:56 ` Paul Mackerras
2006-02-23 3:35 ` H. Peter Anvin
2006-02-23 17:32 ` Ralf Baechle
2006-02-23 17:43 ` H. Peter Anvin
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