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SubjectRe: [RESEND PATCH V4] pidns: introduce syscall translate_pid

On 04/03/2018 02:52 PM, Andrew Morton wrote:
> On Tue, 3 Apr 2018 14:45:28 -0700 Nagarathnam Muthusamy <> wrote:
>>> This changelog doesn't explain what the value is to our users. I
>>> assume it is a performance optimization because "backward translation
>>> requires scanning all tasks"? If so, please show us real-world
>>> examples of the performance benefit from this patch, and please go to
>>> great lengths to explain to us why this optimisation is needed by our
>>> users.
>> One of the usecase by Oracle database involves multiple levels of
>> nested pid namespaces and we require pid translation between the
>> levels. Discussions on the particular usecase, why any of the existing
>> methods was not usable happened in the following thread.
>> At the end, it was agreed that this patch along with flocks will solve the
>> issue.
> Nobody who reads this patch's changelog will know any of this. Please
> let's get all this information into the proper place.
Sure! Will resend the patch with updated change log.


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