Commit3b855b0

Sokolov Yura

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cfs: prefsync original file without lock

durable_rename fsyncs old file. lets fsync it by ourself without lock.

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Original file line number	Diff line number	Diff line change
`@@ -994,6 +994,13 @@ static bool cfs_gc_file(char* map_path, GC_CALL_KIND background)`
`994`	`994`	`}`
`995`	`995`
`996`	`996`	`/* Persist bigger part of copy to not do it under lock */`
	`997`	`+/* and persist previous file, cause it will be fsynced in durable rename */`
	`998`	`+if (pg_fsync(fd)<0)`
	`999`	`+{`
	`1000`	`+elog(WARNING,"CFS failed to sync file %s: %m",file_bck_path);`
	`1001`	`+gotoCleanup;`
	`1002`	`+}`
	`1003`	`+`
`997`	`1004`	`if (pg_fsync(fd2)<0)`
`998`	`1005`	`{`
`999`	`1006`	`elog(WARNING,"CFS failed to sync file %s: %m",file_bck_path);`

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