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Re: [Xen-devel] [PATCH] xen: superficial clean-ups
- To: chenbaodong <chenbaodong@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 11 Jun 2019 11:53:19 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Tue, 11 Jun 2019 10:53:35 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 11/06/2019 11:33, chenbaodong wrote:
>
> On 6/11/19 17:45, Andrew Cooper wrote:
>> On 11/06/2019 10:20, Baodong Chen wrote:
>>> * Remove redundant set 'DOMDYING_dead'
>>> domain_create() will set this when fail, thus no need
>>> set in arch_domain_create().
>> Its not redundant. It is necessary for correct cleanup.
>
> Hello Andrew,
>
> Thanks for your comments.
>
> Your concern is: when the arch_domain_create() fails,
>
> some cleanup work need to done in this function.
>
> and 'DOMDYING_dead' flags maybe needed to judge for correct cleanup?
>
> If so, it's not redundant.
>
> I'm curious why 'DOMDYING_dead' been set by fail path both in
> arch_domain_create()
>
> and domain_create().
Because various cleanup paths BUG_ON(!d->is_dying), including ones
before hitting the main error path in domain_create().
~Andrew
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