diff --git a/manifest b/manifest
index 89ee1c3ea0..1c8038a9b7 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Change\sOS_UNIX\sto\sSQLITE_OS_UNIX\sin\stest_thread.c.\s\sModify\snotify2.test\sto\nprint\sout\sits\stimings\sin\saddition\sto\sreporting\ssuccess\sor\sfailure.\s(CVS\s6382)
-D 2009-03-24T18:42:16
+C Use\sfdatasync()\sonly\son\slinux,\sunless\s-Dfdatasync=fdatasync\sis\sset\sat\ncompilation\stime.\s(CVS\s6383)
+D 2009-03-25T01:06:02
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 583e87706abc3026960ed759aff6371faf84c211
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -141,7 +141,7 @@ F src/os.c ed93a6b46132a602c4fd7a58142e2981c829c79d
 F src/os.h fa3f4aa0119ff721a2da4b47ffd74406ac864c05
 F src/os_common.h 8c61457df58f1a4bd5f5adc3e90e01b37bf7afbc
 F src/os_os2.c bed77dc26e3a95ce4a204936b9a1ca6fe612fcc5
-F src/os_unix.c a20fe61c025117452c003ae4cafd05c3e610b616
+F src/os_unix.c 7bf3ebde13154a97f797df1551d19cf0d2785c15
 F src/os_win.c 40636702058ed4dcd35d68151bfab56d4997cdc1
 F src/pager.c da7ffd068347cdc88b477875585d53dcf2bdc4a7
 F src/pager.h 0c9f3520c00d8a3b8e792ca56c9a11b6b02b4b0f
@@ -709,7 +709,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P f398a2d1b0a731bbb600d0bb70ab79f1334ceda9
-R e985bb02f394f55006cd15c1b29cea14
+P 940d72d2bae95ddd1aea9b63424179735f440296
+R b19c5ed41e19ad8042490824f83b5b77
 U drh
-Z cd8d35f0858a96c51f531491feb53bc1
+Z 6e13e4e2fd0eec7485fb0fffc49dff79
diff --git a/manifest.uuid b/manifest.uuid
index e4ee2c6df5..a2338ad2cf 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-940d72d2bae95ddd1aea9b63424179735f440296
\ No newline at end of file
+cbf2ca4cc41f1f710635b863db6e98074bd5e8bc
\ No newline at end of file
diff --git a/src/os_unix.c b/src/os_unix.c
index 01ca657b75..4909baaa39 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -43,7 +43,7 @@
 **   *  Definitions of sqlite3_vfs objects for all locking methods
 **      plus implementations of sqlite3_os_init() and sqlite3_os_end().
 **
-** $Id: os_unix.c,v 1.244 2009/03/21 14:56:52 drh Exp $
+** $Id: os_unix.c,v 1.245 2009/03/25 01:06:02 drh Exp $
 */
 #include "sqliteInt.h"
 #if SQLITE_OS_UNIX              /* This file is used on unix only */
@@ -2824,10 +2824,12 @@ int sqlite3_fullsync_count = 0;
 #endif
 
 /*
-** We assume that most systems these days support fdatasync().  Those
-** machines that do not can define -Dfdatasync=fsync.
+** We do not trust systems to provide a working fdatasync().  Some do.
+** Others do no.  To be safe, we will stick with the (slower) fsync().
+** If you know that your system does support fdatasync() correctly,
+** then simply compile with -Dfdatasync=fdatasync
 */
-#if 0
+#if !defined(fdatasync) && !defined(__linux__)
 # define fdatasync fsync
 #endif