Re: [PATCH v2] xfs: use per-AG reservations for the finobt

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On Tue, Jan 24, 2017 at 08:48:37AM -0800, Darrick J. Wong wrote:
> I'd just print out:
> 
> "Per-AG reservation for AG ${agno} failed.  Filesystem may run out of space."

Sure, I can do that.

> 
> if any of the (now three) invocations of __xfs_ag_resv_init() returns
> ENOSPC, since the AG is more than 98% full.  Some day, a sysadmin could
> then use the fsmap data to identify which inodes are using the most
> space in that AG and arrange to migrate/remove/etc the data to another
> AG.

But for all but the reflink one this can't happen as the reservations
have been there since the beginning.  And if they fail neverless we fail
the mount.  Or am I missing something here?
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