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Commitf99760c

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Convert wal_sync_method to guc enum.
1 parentf8c4d7d commitf99760c

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5 files changed

+77
-63
lines changed

5 files changed

+77
-63
lines changed

‎src/backend/access/transam/xlog.c‎

Lines changed: 53 additions & 40 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.303 2008/05/1200:00:46 alvherre Exp $
10+
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.304 2008/05/1208:35:05 mha Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -66,8 +66,6 @@ intXLOGbuffers = 8;
6666
intXLogArchiveTimeout=0;
6767
boolXLogArchiveMode= false;
6868
char*XLogArchiveCommand=NULL;
69-
char*XLOG_sync_method=NULL;
70-
constcharXLOG_sync_method_default[]=DEFAULT_SYNC_METHOD_STR;
7169
boolfullPageWrites= true;
7270
boollog_checkpoints= false;
7371

@@ -95,6 +93,25 @@ static intopen_sync_bit = DEFAULT_SYNC_FLAGBIT;
9593

9694
#defineXLOG_SYNC_BIT (enableFsync ? open_sync_bit : 0)
9795

96+
/*
97+
* GUC support
98+
*/
99+
conststructconfig_enum_entrysync_method_options[]= {
100+
{"fsync",SYNC_METHOD_FSYNC},
101+
#ifdefHAVE_FSYNC_WRITETHROUGH
102+
{"fsync_writethrough",SYNC_METHOD_FSYNC_WRITETHROUGH},
103+
#endif
104+
#ifdefHAVE_FDATASYNC
105+
{"fdatasync",SYNC_METHOD_FDATASYNC},
106+
#endif
107+
#ifdefOPEN_SYNC_FLAG
108+
{"open_sync",SYNC_METHOD_OPEN},
109+
#endif
110+
#ifdefOPEN_DATASYNC_FLAG
111+
{"open_datasync",SYNC_METHOD_OPEN_DSYNC},
112+
#endif
113+
{NULL,0}
114+
};
98115

99116
/*
100117
* Statistics for current checkpoint are collected in this global struct.
@@ -1601,7 +1618,7 @@ XLogWrite(XLogwrtRqst WriteRqst, bool flexible, bool xlog_switch)
16011618
* have no open file or the wrong one.However, we do not need to
16021619
* fsync more than one file.
16031620
*/
1604-
if (sync_method!=SYNC_METHOD_OPEN)
1621+
if (sync_method!=SYNC_METHOD_OPEN&&sync_method!=SYNC_METHOD_OPEN_DSYNC)
16051622
{
16061623
if (openLogFile >=0&&
16071624
!XLByteInPrevSeg(LogwrtResult.Write,openLogId,openLogSeg))
@@ -6314,50 +6331,46 @@ xlog_outrec(StringInfo buf, XLogRecord *record)
63146331
/*
63156332
* GUC support
63166333
*/
6317-
constchar*
6318-
assign_xlog_sync_method(constchar*method,booldoit,GucSourcesource)
6334+
bool
6335+
assign_xlog_sync_method(intnew_sync_method,booldoit,GucSourcesource)
63196336
{
6320-
intnew_sync_method;
6321-
intnew_sync_bit;
6337+
intnew_sync_bit=0;
63226338

6323-
if (pg_strcasecmp(method,"fsync")==0)
6324-
{
6325-
new_sync_method=SYNC_METHOD_FSYNC;
6326-
new_sync_bit=0;
6327-
}
6328-
#ifdefHAVE_FSYNC_WRITETHROUGH
6329-
elseif (pg_strcasecmp(method, "fsync_writethrough")==0)
6330-
{
6331-
new_sync_method=SYNC_METHOD_FSYNC_WRITETHROUGH;
6332-
new_sync_bit=0;
6333-
}
6334-
#endif
6335-
#ifdefHAVE_FDATASYNC
6336-
elseif (pg_strcasecmp(method, "fdatasync")==0)
6339+
switch (new_sync_method)
63376340
{
6338-
new_sync_method=SYNC_METHOD_FDATASYNC;
6339-
new_sync_bit=0;
6340-
}
6341-
#endif
6341+
/*
6342+
* Values for these sync options are defined even if they are not
6343+
* supported on the current platform. They are not included in
6344+
* the enum option array, and therefor will never be set if the
6345+
* platform doesn't support it.
6346+
*/
6347+
caseSYNC_METHOD_FSYNC:
6348+
caseSYNC_METHOD_FSYNC_WRITETHROUGH:
6349+
caseSYNC_METHOD_FDATASYNC:
6350+
new_sync_bit=0;
6351+
break;
63426352
#ifdefOPEN_SYNC_FLAG
6343-
elseif (pg_strcasecmp(method, "open_sync")==0)
6344-
{
6345-
new_sync_method=SYNC_METHOD_OPEN;
6346-
new_sync_bit=OPEN_SYNC_FLAG;
6347-
}
6353+
caseSYNC_METHOD_OPEN:
6354+
new_sync_bit=OPEN_SYNC_FLAG;
6355+
break;
63486356
#endif
63496357
#ifdefOPEN_DATASYNC_FLAG
6350-
elseif (pg_strcasecmp(method, "open_datasync")==0)
6351-
{
6352-
new_sync_method=SYNC_METHOD_OPEN;
6353-
new_sync_bit=OPEN_DATASYNC_FLAG;
6354-
}
6358+
caseSYNC_METHOD_OPEN_DSYNC:
6359+
new_sync_bit=OPEN_DATASYNC_FLAG;
6360+
break;
63556361
#endif
6356-
else
6357-
returnNULL;
6362+
default:
6363+
/*
6364+
* This "can never happen", since the available values in
6365+
* new_sync_method are controlled by the available enum
6366+
* options.
6367+
*/
6368+
elog(PANIC,"unrecognized wal_sync_method: %d",sync_method);
6369+
break;
6370+
}
63586371

63596372
if (!doit)
6360-
returnmethod;
6373+
returntrue;
63616374

63626375
if (sync_method!=new_sync_method||open_sync_bit!=new_sync_bit)
63636376
{
@@ -6381,7 +6394,7 @@ assign_xlog_sync_method(const char *method, bool doit, GucSource source)
63816394
open_sync_bit=new_sync_bit;
63826395
}
63836396

6384-
returnmethod;
6397+
returntrue;
63856398
}
63866399

63876400

‎src/backend/utils/misc/guc.c‎

Lines changed: 16 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
1010
* Written by Peter Eisentraut <peter_e@gmx.net>.
1111
*
1212
* IDENTIFICATION
13-
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.452 2008/05/1200:00:52 alvherre Exp $
13+
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.453 2008/05/1208:35:05 mha Exp $
1414
*
1515
*--------------------------------------------------------------------
1616
*/
@@ -270,6 +270,11 @@ static const struct config_enum_entry backslash_quote_options[] = {
270270
{NULL,0}
271271
};
272272

273+
/*
274+
* Options for enum values stored in other modules
275+
*/
276+
externconststructconfig_enum_entrysync_method_options[];
277+
273278
/*
274279
* GUC option variables that are exported from this module
275280
*/
@@ -2327,15 +2332,6 @@ static struct config_string ConfigureNamesString[] =
23272332
"localhost",NULL,NULL
23282333
},
23292334

2330-
{
2331-
{"wal_sync_method",PGC_SIGHUP,WAL_SETTINGS,
2332-
gettext_noop("Selects the method used for forcing WAL updates to disk."),
2333-
NULL
2334-
},
2335-
&XLOG_sync_method,
2336-
XLOG_sync_method_default,assign_xlog_sync_method,NULL
2337-
},
2338-
23392335
{
23402336
{"custom_variable_classes",PGC_SIGHUP,CUSTOM_OPTIONS,
23412337
gettext_noop("Sets the list of known custom variable classes."),
@@ -2528,6 +2524,16 @@ static struct config_enum ConfigureNamesEnum[] =
25282524
assign_session_replication_role,NULL
25292525
},
25302526

2527+
{
2528+
{"wal_sync_method",PGC_SIGHUP,WAL_SETTINGS,
2529+
gettext_noop("Selects the method used for forcing WAL updates to disk."),
2530+
NULL
2531+
},
2532+
&sync_method,
2533+
DEFAULT_SYNC_METHOD,sync_method_options,
2534+
assign_xlog_sync_method,NULL
2535+
},
2536+
25312537
{
25322538
{"xmlbinary",PGC_USERSET,CLIENT_CONN_STATEMENT,
25332539
gettext_noop("Sets how binary values are to be encoded in XML."),

‎src/include/access/xlog.h‎

Lines changed: 3 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
9-
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.87 2008/01/01 19:45:56 momjian Exp $
9+
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.88 2008/05/12 08:35:05 mha Exp $
1010
*/
1111
#ifndefXLOG_H
1212
#defineXLOG_H
@@ -88,8 +88,9 @@ typedef struct XLogRecord
8888
/* Sync methods */
8989
#defineSYNC_METHOD_FSYNC0
9090
#defineSYNC_METHOD_FDATASYNC1
91-
#defineSYNC_METHOD_OPEN2/* for O_SYNCand O_DSYNC*/
91+
#defineSYNC_METHOD_OPEN2/* for O_SYNC */
9292
#defineSYNC_METHOD_FSYNC_WRITETHROUGH3
93+
#defineSYNC_METHOD_OPEN_DSYNC4/* for O_DSYNC */
9394
externintsync_method;
9495

9596
/*
@@ -141,8 +142,6 @@ extern intXLOGbuffers;
141142
externboolXLogArchiveMode;
142143
externchar*XLogArchiveCommand;
143144
externintXLogArchiveTimeout;
144-
externchar*XLOG_sync_method;
145-
externconstcharXLOG_sync_method_default[];
146145
externboollog_checkpoints;
147146

148147
#defineXLogArchivingActive()(XLogArchiveMode)

‎src/include/access/xlogdefs.h‎

Lines changed: 2 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/access/xlogdefs.h,v 1.19 2008/01/01 19:45:56 momjian Exp $
10+
* $PostgreSQL: pgsql/src/include/access/xlogdefs.h,v 1.20 2008/05/12 08:35:05 mha Exp $
1111
*/
1212
#ifndefXLOG_DEFS_H
1313
#defineXLOG_DEFS_H
@@ -109,19 +109,15 @@ typedef uint32 TimeLineID;
109109
#endif
110110

111111
#if defined(OPEN_DATASYNC_FLAG)
112-
#defineDEFAULT_SYNC_METHOD_STR "open_datasync"
113-
#defineDEFAULT_SYNC_METHODSYNC_METHOD_OPEN
112+
#defineDEFAULT_SYNC_METHODSYNC_METHOD_OPEN_DSYNC
114113
#defineDEFAULT_SYNC_FLAGBITOPEN_DATASYNC_FLAG
115114
#elif defined(HAVE_FDATASYNC)
116-
#defineDEFAULT_SYNC_METHOD_STR "fdatasync"
117115
#defineDEFAULT_SYNC_METHODSYNC_METHOD_FDATASYNC
118116
#defineDEFAULT_SYNC_FLAGBIT0
119117
#elif defined(HAVE_FSYNC_WRITETHROUGH_ONLY)
120-
#defineDEFAULT_SYNC_METHOD_STR "fsync_writethrough"
121118
#defineDEFAULT_SYNC_METHODSYNC_METHOD_FSYNC_WRITETHROUGH
122119
#defineDEFAULT_SYNC_FLAGBIT0
123120
#else
124-
#defineDEFAULT_SYNC_METHOD_STR "fsync"
125121
#defineDEFAULT_SYNC_METHODSYNC_METHOD_FSYNC
126122
#defineDEFAULT_SYNC_FLAGBIT0
127123
#endif

‎src/include/utils/guc.h‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
88
* Written by Peter Eisentraut <peter_e@gmx.net>.
99
*
10-
* $PostgreSQL: pgsql/src/include/utils/guc.h,v 1.94 2008/04/18 01:42:17 tgl Exp $
10+
* $PostgreSQL: pgsql/src/include/utils/guc.h,v 1.95 2008/05/12 08:35:05 mha Exp $
1111
*--------------------------------------------------------------------
1212
*/
1313
#ifndefGUC_H
@@ -267,7 +267,7 @@ extern const char *assign_search_path(const char *newval,
267267
booldoit,GucSourcesource);
268268

269269
/* in access/transam/xlog.c */
270-
externconstchar*assign_xlog_sync_method(constchar*method,
271-
booldoit,GucSourcesource);
270+
externboolassign_xlog_sync_method(intnewval,
271+
booldoit,GucSourcesource);
272272

273273
#endif/* GUC_H */

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