RE: [PATCH RESEND v3 5/6] AHCI: Optimize single IRQ interrupt processing

From: Elliott, Robert (Server Storage)
Date: Wed Sep 24 2014 - 23:03:06 EST

> -----Original Message-----
> From: linux-kernel-owner@xxxxxxxxxxxxxxx [mailto:linux-kernel-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Tejun Heo
> The thing I don't get is why multiple MSI handling and this patchset
> are tied to threaded interrupt handling. Splitting locks don't
> necessarily have much to do with threaded handling and it's not like
> ahci interrupt handling is heavy. The hot path is pretty short
> actually. The meat of the work - completing requests and propagating
> completions - is offloaded to softirq by block layer anyway.

blk-mq/scsi-mq chose to move all completion work into hardirq context,
so this seems headed in a different direction.

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