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Re: PAGE_SIZE Availability Inconsistency

From: Anton Blanchard <anton at samba dot org>
To: "H. Peter Anvin" <hpa at zytor dot com>
Cc: David Miller <davem at davemloft dot net>, hch at infradead dot org, arjan at infradead dot org, zippel at linux-m68k dot org, dmlb2000 at gmail dot com, linux-kernel at vger dot kernel dot org, gdb at sourceware dot org
Date: Tue, 20 Mar 2007 21:12:02 -0500
Subject: Re: PAGE_SIZE Availability Inconsistency
References: <20070308.134825.45514445.davem@davemloft.net> <20070309024324.GA24695@kryten> <45F0E014.8060907@zytor.com> <20070308.202718.68040662.davem@davemloft.net> <45F0E309.70403@zytor.com>

Hi,

> The advantage would be that it wouldn't require a v3 for platforms for 
> which MIN_PAGE_SIZE == PAGE_SIZE, which accounts for a very large 
> percentage of systems.
> 
> You still have to look for the darn magic in two places, so there is no 
> reason for it to be different.

The problem is if you can hit in two places then what PAGE_SIZE should
you use to size the contents of the swap header while remaining backward
compatible.

Im leaning towards Dave suggestion of creating a clean v3 swap header.

Anton

Follow-Ups:
- Re: PAGE_SIZE Availability Inconsistency
  - From: H. Peter Anvin

References:
- Re: PAGE_SIZE Availability Inconsistency
  - From: David Miller
- Re: PAGE_SIZE Availability Inconsistency
  - From: Anton Blanchard
- Re: PAGE_SIZE Availability Inconsistency
  - From: H. Peter Anvin
- Re: PAGE_SIZE Availability Inconsistency
  - From: H. Peter Anvin

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