Re: [Xen-devel] [PATCH v2 2/2] libvchan: replace munmap with correct xc_gntshr_munmap

[Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On 10.05.2013 15:46, Ian Campbell wrote:
> On Wed, 2013-05-08 at 15:08 +0100, Marek Marczykowski wrote:
>> On 08.05.2013 15:49, Daniel De Graaf wrote:
>>> On 05/04/2013 06:10 PM, Marek Marczykowski wrote:
>>>> On linux it will end up in munmap anyway, but do not assume any
>>>> particular xc_gntshr_munmap implementation details.
>>>>
>>>> Signed-off-by: Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
>>>
>>> On a client, this ends up using xc_gntshr_munmap to unmap pages that
>>> were mapped with xc_gnttab_map_* instead of using xc_gnttab_unmam
>>>
>>> George: unless there is another OS besides Linux that implements the
>>> xc_gntshr_* interfaces (I found none from a grep of the source), this
>>> is just code clean-up and so could be postponed to 4.4.
>>
>> This is actually prerequirement for libvchan for mini-os (already posted v1,
>> working on v2). But as mini-os libvchan isn't targeted for 4.3, this one also
>> can wait.
> 
> Is the first patch "libxc: fix xc_gntshr_munmap semantic" also included
> in this assessment?
> 
> Message-Id: <20130508040327.91296310@xxxxxxxxxxxxxxxxx>

As long as libxenvchan is the only (at least I'm aware of) user of
xc_gntshr_munmap - probably yes. But IMO it's better to fix xc_gntshr_munmap
sooner than later, to minimize changes in code that uses it (if someone will
start to use it before 4.4 release).

-- 
Best Regards,
Marek Marczykowski
Invisible Things Lab

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