On Wed, Sep 21, 2011 at 04:25:39PM +1000, Dave Chinner wrote: > Which is precisely what I want here - to wait for all the delwri > buffers that were promoted to be submitted before continuing > onwards. This makes the scanning algorithm self throttling - > instead of simply pushing the buffers to the delwri queue and > kicking a background thread and hoping it can flush buffers faster > than we can promote them from the AIL, it explicitly pushes the > delwri buffers before the next round of AIL scanning. The ensures we > start timely IO on the buffers and don't simple continue to scan the > AIL while we wait for the background thread to send them off to > disk and complete. I didn't say I'm against it. The important bit is that such changes in behaviour get documented in the patch description, including a rationale like the on in this mail. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
