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Update README.NT with patch.
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‎doc/README.NT

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@@ -67,3 +67,167 @@ Also, the cygnus-bindir has to be placed in the path before the
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NT-directories, because the sort.exe has to be take for cygnus, not
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NT.
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---------------------------------------------------------------------------
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FIX FOR POSTGRESQL FREEZING ON NT MACHINES
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From: "Hiroshi Inoue" <Inoue@tpf.co.jp>
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To: "Horak Daniel" <horak@mmp.plzen-city.cz>, "'Tom Lane'" <tgl@sss.pgh.pa.us>
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Cc: <pgsql-hackers@postgreSQL.org>
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Subject: RE: [HACKERS] backend freezeing on win32 fixed (I hope ;-) )
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Date: Wed, 18 Aug 1999 08:45:28 +0900
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Message-ID: <000301bee90a$95d40f00$2801007e@cadzone.tpf.co.jp>
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MIME-Version: 1.0
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Content-Type: text/plain;
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charset="iso-8859-1"
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Content-Transfer-Encoding: 7bit
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X-Priority: 3 (Normal)
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X-MSMail-Priority: Normal
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X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
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X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4
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In-reply-to: <2E7F82FAC1FCD2118E1500A024B3BF907DED3F@exchange.mmp.plzen-city.cz>
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Importance: Normal
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Sender: owner-pgsql-hackers@postgreSQL.org
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Precedence: bulk
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Status: RO
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> -----Original Message-----
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> From: owner-pgsql-hackers@postgreSQL.org
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> [mailto:owner-pgsql-hackers@postgreSQL.org]On Behalf Of Horak Daniel
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> Sent: Tuesday, August 17, 1999 9:06 PM
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> To: 'Tom Lane'
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> Cc: 'pgsql-hackers@postgreSQL.org'
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> Subject: RE: [HACKERS] backend freezeing on win32 fixed (I hope ;-) )
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Yutaka Tanida [yutaka@marin.or.jp] and I have examined IPC
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library.
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We found that postmaster doesn't call exec() after fork() since v6.4.
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The value of static/extern variables which cygipc library holds may
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be different from their initial values when postmaster fork()s child
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backend processes.
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I made the following patch for cygipc library on trial.
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This patch was effective for Yutaka's test case.
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Regards.
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Hiroshi Inoue
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Inoue@tpf.co.jp
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*** sem.c.orig Tue Dec 01 00:16:25 1998
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--- sem.c Tue Aug 17 13:22:06 1999
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***************
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*** 58,63 ****
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--- 58,78 ----
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static int GFirstSem = 0; /*PCPC*/
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static int GFdSem ; /*PCPC*/
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+ static pid_t GProcessId = 0;
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+
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+ static void init_globals(void)
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+ {
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+ pid_t pid;
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+
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+ if (pid=getpid(), pid != GProcessId)
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+ {
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+ GFirstSem = 0;
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+ used_sems = used_semids = max_semid = 0;
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+ sem_seq = 0;
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+ GProcessId = pid;
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+ }
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+ }
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+
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/************************************************************************/
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/* Demande d'acces a la zone partagee de gestion des semaphores */
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/************************************************************************/
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***************
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*** 77,82 ****
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--- 92,98 ----
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{
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int LRet ;
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+ init_globals();
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if( GFirstSem == 0 )
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{
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if( IsGSemSemExist() )
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*** shm.c.orig Tue Dec 01 01:04:57 1998
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--- shm.c Tue Aug 17 13:22:27 1999
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***************
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*** 59,64 ****
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--- 59,81 ----
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static int GFirstShm = 0; /*PCPC*/
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static int GFdShm ; /*PCPC*/
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+ /*****************************************/
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+ /* Initialization of static variables */
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+ /*****************************************/
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+ static pid_t GProcessId = 0;
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+ static void init_globals(void)
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+ {
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+ pid_t pid;
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+
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+ if (pid=getpid(), pid != GProcessId)
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+ {
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+ GFirstShm = 0;
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+ shm_rss = shm_swp = max_shmid = 0;
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+ shm_seq = 0;
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+ GProcessId = pid;
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+ }
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+ }
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+
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/************************************************************************/
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/* Demande d'acces a la zone partagee de gestion des shm */
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/************************************************************************/
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***************
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*** 82,87 ****
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--- 99,105 ----
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{
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int LRet ;
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+ init_globals();
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if( GFirstShm == 0 )
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{
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if( IsGSemShmExist() )
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*** msg.c.orig Tue Dec 01 00:16:09 1998
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--- msg.c Tue Aug 17 13:20:04 1999
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***************
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*** 57,62 ****
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--- 57,77 ----
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static int GFirstMsg = 0; /*PCPC*/
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static int GFdMsg ; /*PCPC*/
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+ /*****************************************/
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+ /* Initialization of static variables */
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+ /*****************************************/
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+ static pid_t GProcessId = 0;
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+ static void init_globals(void)
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+ {
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+ pid_t pid;
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+
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+ if (pid=getpid(), pid != GProcessId)
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+ {
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+ GFirstMsg = 0;
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+ msgbytes = msghdrs = msg_seq = used_queues = max_msqid = 0;
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+ GProcessId = pid;
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+ }
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+ }
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/************************************************************************/
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/* Demande d'acces a la zone partagee de gestion des semaphores */
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/************************************************************************/
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***************
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*** 79,84 ****
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--- 94,100 ----
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{
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int LRet ;
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+ init_globals();
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if( GFirstMsg == 0 )
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{
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if( IsGSemMsgExist() )
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