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

[Christoph Hellwig]

On Wed, Jun 29, 2011 at 02:30:17PM -0700, Curt Wohlgemuth wrote:
> I can definitely see how tagging with the start of sync would be
> helpful; also how going from three to two passes seems like a
> no-brainer.
> 
> But what's the real point of doing even two passes -- one SYNC_NONE
> followed by one SYNC_ALL?  Is it try to get through as many inodes as
> possible before we potentially lock up by waiting on an inode on an
> unavailable device?

Yes.  Or at least that's the idea, I'd love to see an actual
prove for it.

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