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From: Juergen Gross <jgross@suse.com>
To: glenn@rimuhosting.com, Steven Haigh <netwiz@crc.id.au>,
	Jennifer Herbert <Jennifer.Herbert@citrix.com>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>,
	"Dietmar Hahn" <dietmar.hahn@ts.fujitsu.com>,
	xen-devel@lists.xen.org
Subject: Re: null domains after xl destroy
Date: Mon, 8 May 2017 11:10:24 +0200	[thread overview]
Message-ID: <f9ace036-ee19-c93e-7d15-8f5a2a2177ca@suse.com> (raw)
In-Reply-To: <11277412-f22f-170a-1a31-6039bdece0f4@rimuhosting.com>

On 04/05/17 00:17, Glenn Enright wrote:
> On 04/05/17 04:58, Steven Haigh wrote:
>> On 04/05/17 01:53, Juergen Gross wrote:
>>> On 03/05/17 12:45, Steven Haigh wrote:
>>>> Just wanted to give this a little nudge now people seem to be back on
>>>> deck...
>>>
>>> Glenn, could you please give the attached patch a try?
>>>
>>> It should be applied on top of the other correction, the old debug
>>> patch should not be applied.
>>>
>>> I have added some debug output to make sure we see what is happening.
>>
>> This patch is included in kernel-xen-4.9.26-1
>>
>> It should be in the repos now.
>>
> 
> Still seeing the same issue. Without the extra debug patch all I see in
> the logs after destroy is this...
> 
> xen-blkback: xen_blkif_disconnect: busy
> xen-blkback: xen_blkif_free: delayed = 0

Hmm, to me it seems as if some grant isn't being unmapped.

Looking at gnttab_unmap_refs_async() I wonder how this is supposed to
work:

I don't see how a grant would ever be unmapped in case of
page_count(item->pages[pc]) > 1 in __gnttab_unmap_refs_async(). All it
does is deferring the call to the unmap operation again and again. Or
am I missing something here?


Juergen

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  reply	other threads:[~2017-05-08  9:10 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-11  5:25 null domains after xl destroy Glenn Enright
2017-04-11  5:59 ` Juergen Gross
2017-04-11  8:03   ` Glenn Enright
2017-04-11  9:49     ` Dietmar Hahn
2017-04-11 22:13       ` Glenn Enright
2017-04-11 22:23         ` Andrew Cooper
2017-04-11 22:45           ` Glenn Enright
2017-04-18  8:36             ` Juergen Gross
2017-04-19  1:02               ` Glenn Enright
2017-04-19  4:39                 ` Juergen Gross
2017-04-19  7:16                   ` Roger Pau Monné
2017-04-19  7:35                     ` Juergen Gross
2017-04-19 10:09                     ` Juergen Gross
2017-04-19 16:22                       ` Steven Haigh
2017-04-21  8:42                         ` Steven Haigh
2017-04-21  8:44                           ` Juergen Gross
2017-05-01  0:55                       ` Glenn Enright
2017-05-03 10:45                         ` Steven Haigh
2017-05-03 13:38                           ` Juergen Gross
2017-05-03 15:53                           ` Juergen Gross
2017-05-03 16:58                             ` Steven Haigh
2017-05-03 22:17                               ` Glenn Enright
2017-05-08  9:10                                 ` Juergen Gross [this message]
2017-05-09  9:24                                   ` Roger Pau Monné
2017-05-13  4:02                                     ` Glenn Enright
2017-05-15  9:57                                       ` Juergen Gross
2017-05-16  0:49                                         ` Glenn Enright
2017-05-16  1:18                                           ` Steven Haigh

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