Re: [patch 10/19] direct-to-BIO I/O for swapcache pages

[Andreas Dilger]

On Jun 16, 2002  23:52 -0700, Andrew Morton wrote:
> This patch changes the swap I/O handling.  The objectives are:
>
> At swapon time (for an S_ISBLK swapfile), we install a single swap extent
> which describes the entire device.
>
> +	inode = sis->swap_file->f_dentry->d_inode;
> +	if (S_ISBLK(inode->i_mode)) {
> +		ret = add_swap_extent(sis, 0, sis->max, 0);
> +		goto done;
> +	}

I believe it is possible to have blocks marked bad in the swap header,
even for a block device, so this will try to use those bad blocks.

Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/