Re: [PATCH V10 00/28] Add new powerpc specific ELF core notes

On 1 June 2016 at 18:26, Anshuman Khandual [off-list ref]
wrote:

On 05/31/2016 04:42 AM, Michael Ellerman wrote:

quoted

Hi Laurent,

Sorry no. My next branch closed for 4.7 about 3 weeks ago.

This series has been blocked for a long time on the gdb support, but

that is

quoted

now working. However it still doesn't pass its own selftests, and I had

some

This series was clearing all of the selftests at the time it was posted.
But yes, it has some assumptions from timing and sync perspective which
gets broken some times as the kernel changes. Its been bit difficult to
perfect the sync requirements as we can do only some much inside the
transaction once it gets started. There are scopes here to improve these
selftests but not clearing them today does not really mean the patches are
now functionally broken.

quoted

disagreements with the implementation - it duplicates a lot of code

rather

quoted

than refactoring things.

hmm, sorry, I dont remember the context here. Can you please point to the
discussion in this regard ?

quoted

I'm waiting on a patch from Cyril which will rework how the TM FP state

is

quoted

handled, and that should make this series easier to implement.

Can you please elaborate on this ? Has this patch been posted in the
mailing
list ? How does this make it easier for us to implement these ELF notes ?

Hi Anshuman,

I'm doing a bit of a rewrite of the TM handling of the FP/VMX/VSX state.

At the moment is is rather confusing since pt_regs is the always the 'live'
state
and theres a ckpt_regs that is the pt_regs for the checkpointed state.
FPU/VMX/VSX
is done differently which is really only creating confusion so I'm changing
it to do the
same at for pt_regs/ckpt_regs. Ultimately this is part of more work from me
but
Michael has told me that at least this bit is useful now so I'm splitting
it off from
the bigger picture and sending asap. At the very least it will make it
easier to know
what and where the transactional state it and where the checkpointed state
is.

It isn't on the list but I hope I'll get it out today.

Cyril

quoted

The plan is that both should go into 4.8.

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-- 
Cyril