linux-kernel - Re: [PATCH 00/10 v2] iommu/amd: lock splitting & GFP

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Date:   Sat, 17 Mar 2018 14:49:54 -0500
From:   Scott Wood <swood@...hat.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de
Subject: Re: [PATCH 00/10 v2] iommu/amd: lock splitting & GFP_KERNEL
 allocation

On Fri, 2018-03-16 at 21:18 +0100, Sebastian Andrzej Siewior wrote:
> The goal here is to make the memory allocation in get_irq_table() not
> with disabled interrupts and having as little raw_spin_lock as
> possible
> while having them if the caller is also holding one (like desc->lock
> during IRQ-affinity changes).
> I reverted one patch one patch in the iommu while rebasing since it
> make job easier.

If the goal is to have "as little raw_spin_lock as possible" -- and
presumably also to avoid unnecessary complexity -- wouldn't it be
better to leave my patch in, and drop patches 4 and 9?

-Scott