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Re: Distributions still suffering from s390 ABI change problems.
- From: Andreas Arnez <arnez at linux dot vnet dot ibm dot com>
- To: "Carlos O'Donell" <carlos at redhat dot com>
- Cc: David Miller <davem at davemloft dot net>, krebbel at linux dot vnet dot ibm dot com, roland at hack dot frob dot com, aurelien at aurel32 dot net, siddhesh at redhat dot com, allan at archlinux dot org, libc-alpha at sourceware dot org
- Date: Tue, 15 Jul 2014 18:46:38 +0200
- Subject: Re: Distributions still suffering from s390 ABI change problems.
- Authentication-results: sourceware.org; auth=none
- References: <53C40A5A dot 5050202 at redhat dot com> <20140714 dot 130755 dot 505683725595447159 dot davem at davemloft dot net> <53C43A5E dot 9020304 at redhat dot com> <20140714 dot 132444 dot 140785163900092398 dot davem at davemloft dot net> <53C440FF dot 3010308 at redhat dot com>
On Mon, Jul 14 2014, Carlos O'Donell wrote:
> On 07/14/2014 04:24 PM, David Miller wrote:
>> From: "Carlos O'Donell" <carlos@redhat.com>
>> Date: Mon, 14 Jul 2014 16:15:26 -0400
>>
>>> I've never seen a clean way to do a structure size increase, so in practice
>>> that's always a SO version bump. I also don't know what kind of breakage
>>> you have in the entire tooling when you do that. I expect some.
>> ...
>>> We've already had an entire release out with this change. There are binaries
>>> with libc.so.6 already in the wild with the new ABI. So it seems like a mess
>>> any way we swing it.
>>
>> We've told users we will maintain strict compatability against a given
>> SO version of glibc.
>
> Yes we have.
>
>> Now, s390 users cannot give eachother binaries neither backwards nor
>> forwards because of this change. It breaks in _both_ directions.
>
> Yes, that's true.
>
> So what do we do about it?
>
> I want IBM to be a part of this discussion, but we may have to wait
> for another day to let Andreas Krebbel comment.
Note, however, that Andreas Krebbel is currently offline. In his
absence, Stefan Liebler, Uli Weigand, and some other IBMers (including
myself) will give it some more thought.