Re: minleft fixes

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On Tue, Dec 13, 2016 at 04:59:23PM +0100, Christoph Hellwig wrote:
> [now to the correct list address]
> 
> This is my attempt to fix the problems with rmap and reflink file system
> running out of space during delayed extent conversions.  It turns out
> the way minleft has been handled has always been bogus, but the rmap
> enablement made it even worse..
> 
> This has survived xfstests xfs/109 on a 2k fs for 2 1/2 hour here now,
> but Eryu was much better than me at reproducing the problems, so it could
> use some further testing.
> 

Test results looked good to me so far. It passed 200 iterations of
xfs/109 with both xfs_2k_reflink and xfs_1k_reflink test configs. 

Thanks,
Eryu
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