On 06/02/2020 12:57, Jan Beulich wrote:
> On 06.02.2020 12:44, Durrant, Paul wrote:
>>> -Original Message-
>>> From: Julien Grall
>>> Sent: 06 February 2020 11:17
>>> To: Durrant, Paul ; xen-devel@lists.xenproject.org
>>> Cc: Grall, Julien
>>> Subject: Re: [PATCH v2] xen/mm: Avoid
On 06.02.2020 11:38, Julien Grall wrote:
> However, the code may race with the page offlining code (see
> offline_page()). Depending on the ordering, the page may be in offlining
> state (PGC_state_offlining) before it is assigned to a domain.
>
> On debug build, this may result to hit the assert
On 06.02.2020 12:44, Durrant, Paul wrote:
>> -Original Message-
>> From: Julien Grall
>> Sent: 06 February 2020 11:17
>> To: Durrant, Paul ; xen-devel@lists.xenproject.org
>> Cc: Grall, Julien
>> Subject: Re: [PATCH v2] xen/mm: Avoid assuming the page is inuse in
>> assign_pages()
>>
>>
> -Original Message-
> From: Julien Grall
> Sent: 06 February 2020 11:17
> To: Durrant, Paul ; xen-devel@lists.xenproject.org
> Cc: Grall, Julien
> Subject: Re: [PATCH v2] xen/mm: Avoid assuming the page is inuse in
> assign_pages()
>
> Hi Paul,
>
> On 06/02/2020 10:52, Durrant, Paul
Hi Paul,
On 06/02/2020 10:52, Durrant, Paul wrote:
-Original Message-
From: Julien Grall
Sent: 06 February 2020 10:39
To: xen-devel@lists.xenproject.org
Cc: jul...@xen.org; Durrant, Paul ; Grall, Julien
Subject: [PATCH v2] xen/mm: Avoid assuming the page is inuse in
assign_pages()
> -Original Message-
> From: Julien Grall
> Sent: 06 February 2020 10:39
> To: xen-devel@lists.xenproject.org
> Cc: jul...@xen.org; Durrant, Paul ; Grall, Julien
>
> Subject: [PATCH v2] xen/mm: Avoid assuming the page is inuse in
> assign_pages()
>
> From: Julien Grall
>
> At the
From: Julien Grall
At the moment, assign_pages() on the page to be inuse (PGC_state_inuse)
and the state value to be 0.
However, the code may race with the page offlining code (see
offline_page()). Depending on the ordering, the page may be in offlining
state (PGC_state_offlining) before it is
