> The disk_stats structure has an "in flight" member. If we don't have proper
> locking around that, disks will appear to have -3 requests in flight for all
> time, which would look a tad odd.
For what it's worth, the disk stats patch that vendors have been
shipping forever with 2.4 (and that Christoph pushed into 2.4.20) has
this problem, so at least people will be used to it.
<b
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