linux-kernel - Re: [PATCH -v12 02/15] resources: Add probe

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Message-ID: <CAE9FiQVrUbEzopKfeoQZFNdNszLN96brC+rYuGXQCfZvpi_ETQ@mail.gmail.com>
Date:	Tue, 26 Jun 2012 15:07:04 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Tony Luck <tony.luck@...el.com>,
	David Miller <davem@...emloft.net>, x86 <x86@...nel.org>
Cc:	Dominik Brodowski <linux@...inikbrodowski.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH -v12 02/15] resources: Add probe_resource()

On Tue, Jun 26, 2012 at 11:53 AM, Yinghai Lu <yinghai@...nel.org> wrote:
> It is changed from busn_res only version, because Bjorn found that version
> was not holding resource_lock.
> Even it may be ok for busn_res not holding resource_lock.
> It would be better to have it to be generic and use lock and we may
> use it for other resources.
>
> probe_resource() will try to find specified size or more in parent bus.
> If can not find current parent resource, and it will try to expand parents
> top.
> If still can not find that specified on top, it will try to reduce target size
> until find one.
>
> It will return 0, if it find any resource that could be used.
>
> Returned resource is registered in the tree.
> So caller may need to use replace_resource to put real resource in tree.
>
> -v3: remove two parameters that is for debug purpose.
> -v4: fix stop_flags checking.
> -v5: adjust stop_flags checking position to avoid not needed calling
>        into allocate_resource().

please check attached one that is updated after first patch with
__allocate_resource changes.
except this one and first one are changed. left ones are not needed to
be updated.
So i'm not going to resend them.

the git branch does get updated.

Thanks

Yinghai

Download attachment "probe_resource_2.patch" of type "application/octet-stream" (6261 bytes)