Don't let timeout interrupts happen unless ImmediateInterruptOK is set.
Serious oversight in commit 16e1b7a1b7f7ffd8a18713e83c8cd72c9ce48e07:
we should not allow an interrupt to take control away from mainline code
except when ImmediateInterruptOK is set. Just to be safe, let's adopt
the same save-clear-restore dance that's been used for many years in
HandleCatchupInterrupt and HandleNotifyInterrupt, so that nothing bad
happens if a timeout handler invokes code that tests or even manipulates
ImmediateInterruptOK.
Per report of "stuck spinlock" failures from Christophe Pettus, though
many other symptoms are possible. Diagnosis by Andres Freund.
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/e8312b4f03315a98a987997e05a6e9d6d8d84ddf
Modified Files
--------------
src/backend/utils/misc/timeout.c | 36 +++++++++++++++++++++++-------------
1 file changed, 23 insertions(+), 13 deletions(-)
