Re: [PATCH 2/4] build: Alloc space for sched list in the link file

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 18/12/15 16:40, Jonathan Creekmore wrote:
>> On Dec 18, 2015, at 3:01 AM, Andrew Cooper <andrew.cooper3@citrix.com> wrote:
>>
>> On 17/12/2015 20:59, Jonathan Creekmore wrote:
>>> Creates a section to contain scheduler entry pointers that are gathered
>>> together into an array. This will allow, in a follow-on patch, scheduler
>>> entries to be automatically gathered together into the array for
>>> automatic parsing.
>>>
>>> CC: Ian Campbell <ian.campbell@citrix.com>
>>> CC: Stefano Stabellini <stefano.stabellini@citrix.com>
>>> CC: Keir Fraser <keir@xen.org>
>>> CC: Jan Beulich <jbeulich@suse.com>
>>> CC: Andrew Cooper <andrew.cooper3@citrix.com>
>>> Signed-off-by: Jonathan Creekmore <jonathan.creekmore@gmail.com>
>>> ---
>>> xen/arch/arm/xen.lds.S | 4 ++++
>>> xen/arch/x86/xen.lds.S | 4 ++++
>>> 2 files changed, 8 insertions(+)
>>>
>>> diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
>>> index 0488f37..39a4c86 100644
>>> --- a/xen/arch/arm/xen.lds.S
>>> +++ b/xen/arch/arm/xen.lds.S
>>> @@ -57,6 +57,10 @@ SECTIONS
>>>        . = ALIGN(PAGE_SIZE);
>>>        *(.data.page_aligned)
>>>        *(.data)
>>> +       . = ALIGN(8);
>>> +       __schedulers_start = .;
>>> +       *(.data.schedulers)
>>> +       __schedulers_end = .;
>> These arrays are only ever used in __init scheduler_init().  They should
>> be in .init.data rather than .data, which allows their memory to be
>> reclaimed after boot.
>>
>> With that, Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
> So, they are used in scheduler_init() which is marked __init, but scheduler_alloc
> also uses that array (and did before my patch) and it is not marked __init.
>

Ah yes - so they are.  Apologies for the noise.  This should be in .data
and my R-b stands.

~Andrew