From: "H.J. Lu" <hjl.tools@gmail.com>
To: "Carlos O'Donell" <carlos@redhat.com>
Cc: Zack Weinberg <zackw@panix.com>,
Florian Weimer <fweimer@redhat.com>,
"Senkevich, Andrew" <andrew.senkevich@intel.com>,
Andreas Schwab <schwab@suse.de>,
GNU C Library <libc-alpha@sourceware.org>
Subject: Re: [PATCH] Revert Intel CET changes to __jmp_buf_tag (Bug 22743)
Date: Sun, 28 Jan 2018 18:40:00 -0000 [thread overview]
Message-ID: <CAMe9rOr_QqW6Ku8G0Gg5-gB15QF=-jObQDpgWHeSoK63TXqmDA@mail.gmail.com> (raw)
In-Reply-To: <76c1f128-9d5f-7d7c-e844-6ae04ffcfcbd@redhat.com>
On Thu, Jan 25, 2018 at 11:45 PM, Carlos O'Donell <carlos@redhat.com> wrote:
> On 01/25/2018 09:01 AM, H.J. Lu wrote:
>> On Thu, Jan 25, 2018 at 8:46 AM, Carlos O'Donell <carlos@redhat.com> wrote:
>>> On 01/25/2018 08:40 AM, H.J. Lu wrote:
>>>> On Thu, Jan 25, 2018 at 8:36 AM, Carlos O'Donell <carlos@redhat.com> wrote:
>>>>> On 01/25/2018 08:28 AM, H.J. Lu wrote:
>>>>>> On Thu, Jan 25, 2018 at 8:22 AM, Zack Weinberg <zackw@panix.com> wrote:
>>>>>>> On Thu, Jan 25, 2018 at 10:33 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
>>>>>>>> On Thu, Jan 25, 2018 at 6:55 AM, Zack Weinberg <zackw@panix.com> wrote:
>>>>>>>>> In my opinion, the fact that you two are having this argument
>>>>>>>>> reinforces Carlos' position: the original patch should be reverted and
>>>>>>>>> we should figure out what to do in 2.28 when we're not under time
>>>>>>>>> pressure. HJ, do you have some concrete external reason why you must
>>>>>>>>> have this new feature in 2.27? If so, please tell us what it is. To
>>>>>>>>> me it doesn't seem urgent.
>>>>>>>>
>>>>>>>> My question is if we are going to fix it at all. If yes, why not 2.27.
>>>>>>>> Both approaches are opaque to users. They can't tell the difference.
>>>>>>>
>>>>>>> My concerns are entirely based on timing: specifically, you seem to be
>>>>>>> in a rush to squeak under the 2.27 deadline. Rushing leads to
>>>>>>> mistakes.
>>>>>>
>>>>>> The main issue for this one is testcase. Once a testcase is found, we
>>>>>> know how to avoid the issue.
>>>>>>
>>>>>>> This seems like the sort of thing that could reasonably be backported
>>>>>>> to the release branch(es) ... *after* we have calmly, without rushing,
>>>>>>> figured out the correct fix in mainline.
>>>>>>>
>>>>>>
>>>>>> I am fine with reverting my patch only on 2.27 branch, not on master.
>>>>>
>>>>> This does not make sense. The revert on master would last for as long as
>>>>> you have to come up with a patch that works and everyone accepts and has
>>>>> consensus.
>>>>
>>>> We have 2 proposals, one with a patch and one without. How long
>>>> should it take to make a decision?
>>>
>>> However long it takes.
>>>
>>> Until then we revert the patches.
>>>
>>
>> Sure. Please revert it now.
>>
>> I will submit a patch to re-apply it + my fix after 2.27 branch
>> is taken.
>
> I have reverted the ABI breaking changes along with the matching
> change which adds feature_1.
>
> Thank you for working with everyone on this issue. I will spend the
> day tomorrow reviewing these patches.
>
FYI, my current patch is on hjl/pr22743/master branch at
https://github.com/hjl-tools/glibc/tree/hjl/pr22743/master
--
H.J.
next prev parent reply other threads:[~2018-01-28 16:53 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-07 17:41 [PATCH 1/2] Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563] H.J. Lu
2017-12-07 17:58 ` Joseph Myers
2017-12-07 18:37 ` Florian Weimer
2017-12-07 18:59 ` H.J. Lu
2017-12-07 19:09 ` Florian Weimer
2017-12-07 19:12 ` H.J. Lu
2017-12-07 19:14 ` Florian Weimer
2017-12-07 19:19 ` H.J. Lu
2017-12-07 19:25 ` Florian Weimer
2017-12-07 19:35 ` H.J. Lu
2017-12-08 2:25 ` H.J. Lu
2017-12-14 13:06 ` H.J. Lu
2017-12-15 17:43 ` H.J. Lu
2017-12-18 10:25 ` Florian Weimer
2017-12-18 11:42 ` H.J. Lu
2017-12-18 11:49 ` Florian Weimer
2017-12-18 12:25 ` H.J. Lu
2017-12-18 12:52 ` Florian Weimer
2017-12-18 13:19 ` H.J. Lu
2017-12-18 14:13 ` H.J. Lu
2017-12-18 14:45 ` Andreas Schwab
2017-12-18 14:48 ` H.J. Lu
2017-12-18 16:29 ` H.J. Lu
2018-01-09 10:47 ` Florian Weimer
2018-01-09 12:17 ` H.J. Lu
2018-01-09 16:20 ` Senkevich, Andrew
2018-01-21 16:16 ` Aurelien Jarno
2018-01-21 16:27 ` H.J. Lu
2018-01-21 16:50 ` Carlos O'Donell
2018-01-22 14:44 ` Senkevich, Andrew
2018-01-23 19:35 ` Carlos O'Donell
2018-01-23 21:13 ` Senkevich, Andrew
2018-01-24 18:08 ` H.J. Lu
2018-01-24 18:23 ` Florian Weimer
2018-01-25 0:32 ` Carlos O'Donell
2018-01-25 0:56 ` Joseph Myers
2018-01-25 1:09 ` H.J. Lu
2018-01-25 1:44 ` Carlos O'Donell
2018-01-25 1:48 ` Dmitry V. Levin
2018-01-25 4:53 ` [PATCH] Revert Intel CET changes to __jmp_buf_tag (Bug 22743) Carlos O'Donell
2018-01-25 5:33 ` H.J. Lu
2018-01-25 9:47 ` Florian Weimer
2018-01-25 12:38 ` H.J. Lu
2018-01-25 12:50 ` Florian Weimer
2018-01-25 13:00 ` H.J. Lu
2018-01-25 14:56 ` Zack Weinberg
2018-01-25 15:33 ` H.J. Lu
2018-01-25 16:22 ` Zack Weinberg
2018-01-25 16:28 ` H.J. Lu
2018-01-25 16:36 ` Carlos O'Donell
2018-01-25 16:40 ` H.J. Lu
2018-01-25 16:46 ` Carlos O'Donell
2018-01-25 17:01 ` H.J. Lu
2018-01-26 7:46 ` Carlos O'Donell
2018-01-28 18:40 ` H.J. Lu [this message]
2018-01-25 16:47 ` Florian Weimer
2018-01-25 16:55 ` H.J. Lu
2018-01-25 18:26 ` Joseph Myers
2018-01-25 19:21 ` H.J. Lu
2018-01-25 16:37 ` Carlos O'Donell
2018-01-25 16:38 ` Florian Weimer
2017-12-18 17:37 ` [PATCH 1/2] Linux/x86: Update cancel_jmp_buf to match __jmp_buf_tag [BZ #22563] Joseph Myers
2017-12-18 21:19 ` H.J. Lu
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