Bruce Momjian 50938576d4 I tried to build PostgreSQL with the following step to see backends hung ... during the regression test. The problem has been reproduced on two machine but both of these are the same type of hardware and software. I also tried to recreate the problem on other machines, on older version of AIX but I couldn't. After looked through pgsql-hackers mailing list, I focused on spin lock issue to solve the problem. The easiest and may not be the best solution for the problem is to give up HAS_TEST_AND_SET. This actually works. One another and better solution for the problem is to use _check_lock() and _clear_lock() as spin lock. Important thing here is to define S_UNLOCK() with _clear_lock(). This will solve the so called "Compiler bug" issue someone wrote on the mailing list. We have some other API such as cs(), compare_and_swap() and fetch_and_or() to do test and set on AIX, but any of these didn't solve my problem. I wrote tiny testing program to see if we have any bug of these API of AIX, but I couldn't see any problem except for compare_and_swap(). It seems that you can not use compare_and_swap() for the purpose, as it would not work as spin lock on any SMP machines I tested. I don't know the reason why cs() nor fetch_and_or()/fetch_and_and() will not work with PostgreSQL on p690. These worked with my testing program on all machines I tested. Tomoyuki Niijima		2002-09-02 04:42:52 +00:00
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backendid.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
block.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
buf.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
buf_internals.h	Restructure local-buffer handling per recent pghackers discussion.	2002-08-06 02:36:35 +00:00
buffile.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
bufmgr.h	Code review of CLUSTER patch. Clean up problems with relcache getting	2002-08-11 21:17:35 +00:00
bufpage.h	Code review for HeapTupleHeader changes. Add version number to page headers	2002-09-02 01:05:06 +00:00
fd.h	Restructure local-buffer handling per recent pghackers discussion.	2002-08-06 02:36:35 +00:00
freespace.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
ipc.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
item.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
itemid.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
itempos.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
itemptr.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
large_object.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
lmgr.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
lock.h	Code review for pg_locks feature. Make shmemoffset of PROCLOCK structs	2002-08-31 17:14:28 +00:00
lwlock.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
off.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
page.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
pg_sema.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
pg_shmem.h	Remove sys/types.h in files that include postgres.h, and hence c.h,	2002-09-02 02:47:07 +00:00
pmsignal.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
pos.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00
proc.h	Complete TODO item:	2002-07-19 00:17:40 +00:00
relfilenode.h	New pgindent run with fixes suggested by Tom. Patch manually reviewed,	2001-11-05 17:46:40 +00:00
s_lock.h	I tried to build PostgreSQL with the following step to see backends hung	2002-09-02 04:42:52 +00:00
shmem.h	[ Newest version of patch applied.]	2002-08-17 13:04:19 +00:00
sinval.h	This patch reserves the last superuser_reserved_connections slots for	2002-08-29 21:02:12 +00:00
sinvaladt.h	This patch reserves the last superuser_reserved_connections slots for	2002-08-29 21:02:12 +00:00
smgr.h	Restructure local-buffer handling per recent pghackers discussion.	2002-08-06 02:36:35 +00:00
spin.h	Update copyright to 2002.	2002-06-20 20:29:54 +00:00