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

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Date:	Wed, 01 Jun 2016 13:56:42 +0530
From:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:	Michael Ellerman <mpe@...erman.id.au>,
	Laurent Dufour <ldufour@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
CC:	mikey@...ling.org, james.hogan@...tec.com, avagin@...nvz.org,
	Paul.Clothier@...tec.com, cyrilbur@...il.com, peterz@...radead.org,
	palves@...hat.com, emachado@...ux.vnet.ibm.com,
	shuahkh@....samsung.com, akpm@...ux-foundation.org,
	oleg@...hat.com, dhowells@...hat.com, Ulrich.Weigand@...ibm.com,
	kirjanov@...il.com, davej@...hat.com, tglx@...utronix.de,
	sukadev@...ux.vnet.ibm.com, davem@...emloft.net,
	sam.bobroff@....ibm.com
Subject: Re: [PATCH V10 00/28] Add new powerpc specific ELF core notes

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

> disagreements with the implementation - it duplicates a lot of code rather
> than refactoring things.

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

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

> 
> The plan is that both should go into 4.8.