Re: [PATCH] writeback: Don't wait for completion inwriteback_inodes_sb_nr

[Christoph Hellwig]

On Mon, Jul 11, 2011 at 09:48:35PM +0200, Jan Kara wrote:
>   Well, they're not exactly cheap (journaling filesystems have to force
> transaction commits and wait for them) but that does not really matter.
> The real problem is that to wait for IO completion you need some list of
> inodes you want to wait for and you can currently get such list only from
> superblock.

All block device inodes sit on blockdev_superblock, we got rid of inodes
without a superblock long time ago.

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