Andres Freund fc02e6724f Fix race condition between relation extension and vacuum. ... In e6799d5a53 I removed vacuumlazy.c trickery around re-checking whether a page is actually empty after acquiring an extension lock on the relation, because the page is not PageInit()ed anymore, and entries in the FSM ought not to lead to user-visible errors. As reported by various buildfarm animals that is not correct, given the way to code currently stands: If vacuum processes a page that's just been newly added by either RelationGetBufferForTuple() or RelationAddExtraBlocks(), it could add that page to the FSM and it could be reused by other backends, before those two functions check whether the newly added page is actually new. That's a relatively narrow race, but several buildfarm machines appear to be able to hit it. While it seems wrong that the FSM, given it's lack of durability and approximative nature, can trigger errors like this, that seems better fixed in a separate commit. Especially given that a good portion of the buildfarm is red, and this is just re-introducing logic that existed a few hours ago. Author: Andres Freund Discussion: https://postgr.es/m/20190128222259.zhi7ovzgtkft6em6@alap3.anarazel.de		2019-01-28 15:44:12 -08:00
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brin	Revert "Avoid creation of the free space map for small heap relations."	2019-01-28 11:31:44 +05:30
common	Simplify restriction handling of two-phase commit for temporary objects	2019-01-26 10:45:23 +09:00
gin	Fix misc typos in comments.	2019-01-23 13:39:00 +02:00
gist	Update copyright for 2019	2019-01-02 12:44:25 -05:00
hash	Replace heapam.h includes with {table, relation}.h where applicable.	2019-01-21 10:51:37 -08:00
heap	Fix race condition between relation extension and vacuum.	2019-01-28 15:44:12 -08:00
index	Rename RelationData.rd_amroutine to rd_indam.	2019-01-21 17:36:55 -08:00
nbtree	Move generic snapshot related code from tqual.h to snapmgr.h.	2019-01-21 17:06:41 -08:00
rmgrdesc	Update copyright for 2019	2019-01-02 12:44:25 -05:00
spgist	Move remaining code from tqual.[ch] to heapam.h / heapam_visibility.c.	2019-01-21 17:07:10 -08:00
table	Introduce access/{table.h, relation.h}, for generic functions from heapam.h.	2019-01-21 10:51:36 -08:00
tablesample	Don't include heapam.h from others headers.	2019-01-14 16:24:41 -08:00
transam	Revert "Avoid creation of the free space map for small heap relations."	2019-01-28 11:31:44 +05:30
Makefile	Introduce access/{table.h, relation.h}, for generic functions from heapam.h.	2019-01-21 10:51:36 -08:00