Re: AIX support

Sriram RK <sriram.rk@outlook.com>

From: Sriram RK <sriram.rk@outlook.com>

To: Noah Misch <noah@leadboat.com>, Tom Lane <tgl@sss.pgh.pa.us>, Thomas Munro <thomas.munro@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>

Cc: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, "tvk1271@gmail.com" <tvk1271@gmail.com>

Date: 2024-04-18T11:15:43Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Restore AIX support.
- 4a1b05caa55d 19 (unreleased) landed
pg_createsubscriber: Improve error messages.
- 898c131b58a0 18.0 cited
Use <stdint.h> and <inttypes.h> for c.h integers.
- 962da900ac8f 18.0 cited
Stabilize jsonb_path_query test case.
- af2115226831 18.0 cited
Fix C23 compiler warning
- d2b4b4c2259e 18.0 cited
pg_stat_statements: Add tests for nested queries with level tracking
- 45e0ba30fc40 18.0 cited
Add missing newline at the end of index_including.sql
- 54b69f1bd730 17.0 cited
Remove AIX support
- 0b16bb8776bb 17.0 cited
Fix s_lock.h PPC assembly code to be compatible with native AIX assembler.
- c41a1215f049 9.6.0 cited
Use a non-locking initial test in TAS_SPIN on PPC.
- bc2a050d4097 9.2.0 cited
Use LWSYNC in place of SYNC/ISYNC in PPC spinlocks, where possible.
- 631beeac3598 9.2.0 cited
Use mutex hint bit in PPC LWARX instructions, where possible.
- 5cfa8dd3007d 9.2.0 cited
Adjust TAS assembly as per recent discussions: use "+m"(*lock) everywhere
- 109867748259 8.0.0 cited
Apple's assembler likes the inlined TAS syntax too, so no reason to
- f9ba0a7fe563 7.4.1 cited
Tighten up register usage for inline PPC version of tas().
- eb5e4c58d137 7.4.1 cited
Put the isync where it's supposed to be.
- cd35d601b859 7.4.1 cited
> > I'll re-check that with the ppc architecture guy here.
- ceb4f5ea9c2c 7.4.1 cited
Fix PPC s_lock operations to work correctly on multi-CPU machines.
- 7233aae50bea 7.3.1 cited
I tried to build PostgreSQL with the following step to see backends hung
- 50938576d482 7.3.1 cited
Complete merge of all old man page information.
- f2f43efbe1d5 7.1.1 cited
s_lock aix patch.
- e3b06a871b63 7.1.1 cited

Thanks Noah and Team,

We (IBM-AIX team) looked into this issue

https://www.postgresql.org/message-id/20240225194322.a5@rfd.leadboat.com

This is related to the compiler issue. The compilers xlc(13.1) and gcc(8.0) have issues. But we verified that this issue is resolved with the newer compiler versions openXL(xlc17.1) and gcc(12.0) onwards.

We reported this issue to the xlc team and they have noted this issue. A fix might be possible in May for this issue in xlc v16.  We would like to understand if the community can start using the latest compilers to build the source.

Also as part of the support, we will help in fixing all the issues related to AIX and continue to support AIX for Postgres. If we need another CI environment we can work to make one available. But for time being can we start reverting the patch that has removed AIX support.

We want to make a note that postgres is used extensively in our IBM product and is being exploited by multiple customers.

Please let us know if there are any specific details you'd like to discuss further.

Regards,
Sriram.