Re: [PATCH -mm 5/6] mm: Print first block offset for swap areas

From: Andrew Morton
Date: Tue Sep 26 2006 - 15:39:54 EST

On Sat, 23 Sep 2006 12:10:54 +0200
"Rafael J. Wysocki" <rjw@xxxxxxx> wrote:

> In order to use a swap file with swsusp we need to know the offset at which
> its swap header is located. However, the swap header is always located in the
> first page block of the swap file and it's quite easy to make sys_swapon() print
> the offset of the swap file's (or swap partition's) first page block.

Why is this needed? The swapfile's pathname is present in /proc/swaps, so
an application can read that, do the FIBMAP and rewrite grub.conf without
needing to parse dmesg?
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