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Re: PAGE_SIZE Availability Inconsistency

From: "H. Peter Anvin" <hpa at zytor dot com>
To: David Miller <davem at davemloft dot net>
Cc: anton at samba dot org, 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: Thu, 08 Mar 2007 20:31:05 -0800
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>

David Miller wrote:

From: "H. Peter Anvin" <hpa@zytor.com>
Date: Thu, 08 Mar 2007 20:18:28 -0800
Anton Blanchard wrote:
The other option is to create a v3 swap format that doesnt use any
PAGE_SIZE parameters.
The best thing to do would be to look for the magic both at PAGE_SIZE (for compatibility) and MIN_PAGE_SIZE (for sanity.)
That might work, but a large part of me says to go for v3
and do it cleanly.

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.

-hpa

Follow-Ups:
- Re: PAGE_SIZE Availability Inconsistency
  - From: David Miller
- Re: PAGE_SIZE Availability Inconsistency
  - From: Anton Blanchard

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

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