D25160.1789808899.diff
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D25160.1789808899.diff
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	Index: sys/ufs/ffs/ffs_vnops.c
	===================================================================
	--- sys/ufs/ffs/ffs_vnops.c
	+++ sys/ufs/ffs/ffs_vnops.c
	@@ -1001,7 +1001,9 @@
	uio->uio_resid = resid;
	}
	} else if (resid > uio->uio_resid && (ioflag & IO_SYNC)) {
	- error = ffs_update(vp, 1);
	+ if (!(ioflag & IO_DATASYNC) \|\|
	+ (ip->i_flags & (IN_SIZEMOD \| IN_IBLKDATA)))
	+ error = ffs_update(vp, 1);
	if (ffs_fsfail_cleanup(VFSTOUFS(vp->v_mount), error))
	error = ENXIO;
	}