| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | AArch64 has single-copy 64 bit atomicity |
| Date: | 2021-11-02 22:33:40 |
| Message-ID: | CA+hUKGKyJf7kwYkqDgzTE26Ra1m9nvM=eds2RSSu7WSL-r2wKw@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Hi,
Andres mentioned in passing that he'd defined
PG_HAVE_8BYTE_SINGLE_COPY_ATOMICITY only on Itanium, PPC and x86 but
not ARM.
I took a look at https://developer.arm.com/documentation/ddi0487/gb/
under "B2.2.1 Requirements for single-copy atomicity" and it seemed
like we should turn this on for __aarch64__. It goes back to the
original ARMv8-A so should cover all 64 bit ARM systems.
| Attachment | Content-Type | Size |
|---|---|---|
| 0001-AArch64-has-single-copy-64-bit-atomicity.patch | text/x-patch | 907 bytes |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2021-11-02 22:39:00 | Re: [PATCH] postgres_fdw: suppress explicit casts in text:text comparisons (was: column option to override foreign types) |
| Previous Message | David G. Johnston | 2021-11-02 22:30:25 | Re: Predefined role pg_maintenance for VACUUM, ANALYZE, CHECKPOINT. |