Re: [XEN PATCH v4 16/18] build,xsm: Fix multiple call

[Jan Beulich <jbeulich@xxxxxxxx>]

On 16.04.2020 15:02, Anthony PERARD wrote:
> On Wed, Apr 08, 2020 at 03:28:06PM +0200, Jan Beulich wrote:
>> On 31.03.2020 12:31, Anthony PERARD wrote:
>>> Both script mkflask.sh and mkaccess_vector.sh generates multiple
>>> files. Exploits the 'multi-target pattern rule' trick to call each
>>> scripts only once.
>>
>> Isn't this a general fix, which may even want backporting? If so,
>> this would better be at or near the beginning of the series.
> 
> It is mostly a performance improvement, avoiding doing the same thing
> several time. I don't think anything bad happens from concurrent calls,
> or we would already have bug report I think. But I can try to move the
> patch up.

Up to three processes in parallel writing to the same file(s) is
almost certainly a recipe for eventual / random breakage.

Jan