| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Fix hard to hit race condition in heapam's tuple locking code. |
| Date: | 2016-08-05 03:10:35 |
| Message-ID: | E1bVVWt-0001Ia-2W@gemulon.postgresql.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-committers |
Fix hard to hit race condition in heapam's tuple locking code.
As mentioned in its commit message, eca0f1db left open a race condition,
where a page could be marked all-visible, after the code checked
PageIsAllVisible() to pin the VM, but before the page is locked. Plug
that hole.
Reviewed-By: Robert Haas, Andres Freund
Author: Amit Kapila
Discussion: CAEepm=3fWAbWryVW9swHyLTY4sXVf0xbLvXqOwUoDiNCx9mBjQ(at)mail(dot)gmail(dot)com
Backpatch: -
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/e7caacf733f3ee77a555aa715ab6fbf4434e6b52
Modified Files
--------------
src/backend/access/heap/heapam.c | 44 ++++++++++++++++++++++++++++++++++------
1 file changed, 38 insertions(+), 6 deletions(-)
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Robert Haas | 2016-08-05 03:59:06 | Re: [COMMITTERS] pgsql: Prevent "snapshot too old" from trying to return pruned TOAST tu |
| Previous Message | Robert Haas | 2016-08-05 02:58:28 | Re: pgsql: Prevent "snapshot too old" from trying to return pruned TOAST tu |