On 2010-09-08, at 10:59, Lukas Czerner wrote:
> +static inline int sb_issue_zeroout(struct super_block *sb,
> + sector_t block, sector_t nr_blocks)
> +{
> + block <<= (sb->s_blocksize_bits - 9);
> + nr_blocks <<= (sb->s_blocksize_bits - 9);
> + return blkdev_issue_zeroout(sb->s_bdev, block, nr_blocks, GFP_KERNEL,
> + BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
> +}
While I can understand that we might need a barrier for this (to avoid
it being reordered with later writes that are using these blocks), I'm
not sure it needs to wait for previous IO to complete.
Cheers, Andreas
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
