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SubjectRe: [PATCH v4 72/73] xfs: Convert mru cache to XArray
On Tue, Dec 05, 2017 at 08:45:49PM -0800, Matthew Wilcox wrote:
> The dquot code is just going to have to live with the fact that there's
> additional locking going on that it doesn't need. I'm open to getting
> rid of the irqsafety, but we can't give up the spinlock protection
> without giving up the RCU/lockdep analysis and the ability to move nodes.
> I don't suppose the dquot code can

Oops, thought I'd finished writing this paragraph.

I don't suppose the dquot code can be restructured to use the xa_lock to
protect, say, qi_dquots? I suspect not, since you wouldn't know which
of the three xarray locks to use.

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