That fixed it! Because the documentation didn't exactly specify, does
s2disk/resume need its own
swapfile, or can it use ~1/2*RAM of a swapfile currently mounted and in use?
Thanks,
Brandon
[EMAIL PROTECTED] wrote:
> Il Thu, Jan 18, 2007 at 12:26:12PM -0700, Brandon Beck ha scritto:
>> [EMAIL PROTECTED] wrote:
>>> Hi,
>>>
>>> (added Cc to suspend-devel and the author of swap-offset)
>>>
>>> On Thursday, 18 January 2007 08:32, you wrote:
>>>> Hello Rafael,
>>>> Is the resume offset ever supposed to be a negative number? I run
>>>> swap-offset /var/swap on a 2.6.20-rc5 kernel and get -270968. I don't
>>>> really want to mess up my system here.
>>> No, it should be positive.
>>>
>>> What is the size of blocks on your /var?
>> For good or for ill, I have a single partition (sda1) and I recently
>> created the swapfile for use with uswsusp, so it is presumably towards the
>> end of the disk. On /dev/sda1 I have 76920416 1K blocks with 1299176
>> available (99% use :-)
>
> Internally address_space_operation (->bmap) uses a sector_t (u64), but
> the ioctl truncates it to a 32bit signed integer. With 1K blocks it
> gives a limit of 2TB (or 4TB casting back to unsigned int).
>
> What may overflow is this (swap-offset.c:110):
>
> first_block * blk_size
>
> The following patch should fix it:
>
> - Kernel uses unsigned quantify for block number, pass an unsigned int
> to the ioctl.
> - Use 64bit math to avoid overflow.
>
> ---
>
> swap-offset.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> Index: swap-offset.c
> ===================================================================
> RCS file: /cvsroot/suspend/suspend/swap-offset.c,v
> retrieving revision 1.3
> diff -u -r1.3 swap-offset.c
> --- swap-offset.c 12 Nov 2006 21:32:09 -0000 1.3
> +++ swap-offset.c 18 Jan 2007 20:44:06 -0000
> @@ -23,7 +23,8 @@
> #define SWAP_SIG_SIZE 10
>
> int main(int argc, char **argv) {
> - int block, last_block, first_block, blocks_per_page;
> + unsigned int block, last_block, first_block, blocks_per_page;
> + unsigned int offset;
> int size, blk_size;
> int fd;
> int i;
> @@ -107,7 +108,8 @@
> "be used for suspension.\n");
> err = EINVAL;
> } else {
> - printf("resume offset = %d\n", first_block * blk_size / page_size);
> + offset = (unsigned long long)first_block * blk_size / page_size;
> + printf("resume offset = %u\n", offset);
> }
>
> out:
>
> Luca
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