From: Ian Jackson <Ian.Jackson@eu.citrix.com>
To: Aaron Cornelius <aaron.cornelius@dornerworks.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>,
Julien Grall <julien.grall@arm.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Wei Liu <wei.liu2@citrix.com>, Jan Beulich <jbeulich@suse.com>
Subject: Re: Xen 4.7 crash
Date: Thu, 9 Jun 2016 12:14:25 +0100 [thread overview]
Message-ID: <22361.20369.7655.583775@mariner.uk.xensource.com> (raw)
In-Reply-To: <690b3dff-d4cd-2438-c178-24be67bf4c91@dornerworks.com>
Aaron Cornelius writes ("Re: [Xen-devel] Xen 4.7 crash"):
> I am not that familiar with the xenstored code, but as far as I can tell
> the grant mapping will be held by the xenstore until the xs_release()
> function is called (which is not called by libxl, and I do not
> explicitly call it in my software, although I might now just to be
> safe), or until the last reference to a domain is released and the
> registered destructor (destroy_domain), set by talloc_set_destructor(),
> is called.
I'm not sure I follow. Or maybe I disagree. ISTM that:
The grant mapping is released by destroy_domain, which is called via
the talloc destructor as a result of talloc_free(domain->conn) in
domain_cleanup. I don't see other references to domain->conn.
domain_cleanup calls talloc_free on domain->conn when it sees the
domain marked as dying in domain_cleanup.
So I still think that your acl reference ought not to keep the grant
mapping alive.
Ian.
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next prev parent reply other threads:[~2016-06-09 11:14 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-01 19:54 Xen 4.7 crash Aaron Cornelius
2016-06-01 20:00 ` Andrew Cooper
2016-06-01 20:45 ` Aaron Cornelius
2016-06-01 21:24 ` Andrew Cooper
2016-06-01 22:18 ` Julien Grall
2016-06-01 22:26 ` Andrew Cooper
2016-06-01 21:35 ` Andrew Cooper
2016-06-01 22:24 ` Julien Grall
2016-06-01 22:31 ` Andrew Cooper
2016-06-02 8:47 ` Jan Beulich
2016-06-02 8:53 ` Andrew Cooper
2016-06-02 9:07 ` Jan Beulich
2016-06-01 22:35 ` Julien Grall
2016-06-02 1:32 ` Aaron Cornelius
2016-06-02 8:49 ` Jan Beulich
2016-06-02 9:07 ` Julien Grall
2016-06-06 13:58 ` Aaron Cornelius
2016-06-06 14:05 ` Julien Grall
2016-06-06 14:19 ` Wei Liu
2016-06-06 15:02 ` Aaron Cornelius
2016-06-07 9:53 ` Ian Jackson
2016-06-07 13:40 ` Aaron Cornelius
2016-06-07 15:13 ` Aaron Cornelius
2016-06-09 11:14 ` Ian Jackson [this message]
2016-06-14 13:11 ` Aaron Cornelius
2016-06-14 13:15 ` Wei Liu
2016-06-14 13:26 ` Aaron Cornelius
2016-06-14 13:38 ` Aaron Cornelius
2016-06-14 13:47 ` Wei Liu
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