linux-kernel - Re: [PATCH v12 0/4] PCI: Patch series to improve Thunderbolt enumeration

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Date:   Tue, 17 Dec 2019 09:12:48 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: Re: [PATCH v12 0/4] PCI: Patch series to improve Thunderbolt
 enumeration

On Mon, Dec 09, 2019 at 12:59:29PM +0000, Nicholas Johnson wrote:
> Hi all,
> 
> Since last time:
> 	Reverse Christmas tree for a couple of variables
> 
> 	Changed while to whilst (sounds more formal, and so that 
> 	grepping for "while" only brings up code)
> 
> 	Made sure they still apply to latest Linux v5.5-rc1
> 
> Kind regards,
> Nicholas
> 
> Nicholas Johnson (4):
>   PCI: Consider alignment of hot-added bridges when distributing
>     available resources
>   PCI: In extend_bridge_window() change available to new_size
>   PCI: Change extend_bridge_window() to set resource size directly
>   PCI: Allow extend_bridge_window() to shrink resource if necessary

I have tentatively applied these to pci/resource for v5.6, but I need
some kind of high-level description for why we want these changes.

The commit logs describe what the code does, and that's good, but we
really need a little more of the *why* and what the user-visible
benefit is.  I know some of this was in earlier postings, but it seems
to have gotten lost along the way.

Bjorn