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

Pavel Machek
2006-09-21T21:32:54Z

On Wed 2006-09-20 21:54:38, Rafael J. Wysocki 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 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 block.
>
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

ACK.

(main point of this is that it changes user-visible printk, but that's
probably okay, and way better than changing /proc files...)
Pavel
> @@ -1628,9 +1632,10 @@ asmlinkage long sys_swapon(const char __
> total_swap_pages += nr_good_pages;
>
> printk(KERN_INFO "Adding %uk swap on %s. "
> - "Priority:%d extents:%d across:%lluk\n",
> + "Priority:%d extents:%d across:%lluk offset:%llu\n",
> nr_good_pages<<(PAGE_SHIFT-10), name, p->prio,
> - nr_extents, (unsigned long long)span<<(PAGE_SHIFT-10));
> + nr_extents, (unsigned long long)span<<(PAGE_SHIFT-10),
> + (unsigned long long)start);
>
> /* insert swap space into swap_list: */
> prev = -1;

--
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