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VFS_SYNC(9)	       FreeBSD Kernel Developer's Manual	   VFS_SYNC(9)

NAME
     VFS_SYNC -- flush unwritten data

SYNOPSIS
     #include <sys/param.h>
     #include <sys/mount.h>
     #include <sys/vnode.h>

     int
     VFS_SYNC(struct mount *mp,	int waitfor);

DESCRIPTION
     The VFS_SYNC() macro writes out all unwritten data	in the file system
     mounted as	mp.

     The arguments it expects are:

     mp	      The file system.

     waitfor  Whether the function should wait for I/O to complete.  Possible
	      values are:

	      MNT_WAIT	  synchronously	wait for I/O to	complete

	      MNT_NOWAIT  start	all I/O, but do	not wait for it

	      MNT_LAZY	  push data not	written	by file	system syncer

     The VFS_SYNC() macro calls	the vfs_sync method of the file	system,	which
     normally calls VOP_FSYNC(9) for all the vnodes in the file	system.

SEE ALSO
     fsync(2), sync(2),	VFS(9),	vnode(9), VOP_FSYNC(9)

AUTHORS
     This manual page was written by Doug Rabson.

FreeBSD	Ports 11.2		 May 23, 2009		    FreeBSD Ports 11.2

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHORS

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