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

From: Rafael J. Wysocki
Date: Tue Sep 26 2006 - 16:12:05 EST

On Tuesday, 26 September 2006 21:39, Andrew Morton wrote:
> 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?

Well, this is not needed, but it's useful if you have no such application and
want to set up things manually. ;-)
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