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SubjectRe: [RFC 02/15] x86_64: Fold pda into per cpu area
Ingo Molnar wrote:
> * Eric W. Biederman <> wrote:
>> Given that we have not yet understood the weird failure case. This patch needs
>> to be split in two.
>> - make the current per cpu variable section zero based.
>> - Move the pda into the per cpu variable section.
>> There are too many variables at present the reported failure cases to
>> guess what is really going on.
>> We can not optimize the per cpu variable accesses until the pda moves
>> but we can easily test for linker and tool chain bugs with zero
>> based pda segment itself.
> agreed, a patch of this gravity and with a diffstat:
> 12 files changed, 112 insertions(+), 142 deletions(-)
> is indeed too large. Test failures that get bisected to this patch will
> still cause people to guess about which aspect of the large patch caused
> the problem.
> Ingo

That split has been done and I've sent it to Jeremy and Peter for further


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