Re: [PATCH] Increase the default size of the reserved blocks pool

[Mark Goodwin <markgw@xxxxxxx>]

Lachlan McIlroy wrote:
> The current default size of the reserved blocks pool is easy to deplete
> with certain workloads, in particular workloads that do lots of concurrent
> delayed allocation extent conversions.  If enough transactions are running
> in parallel and the entire pool is consumed then subsequent calls to
> xfs_trans_reserve() will fail with ENOSPC.  Also add a rate limited
> warning so we know if this starts happening again.
Should we also change the semantics of the XFS_SET_RESBLKS ioctl
so that the passed in value is the minimum required by the caller,
i.e. silently succeed if the current value is more than that?

Cheers
-- Mark