Re: [PATCH 0/20] return f_fsid for statfs(2)

From: Andreas Dilger
Date: Mon Jan 19 2009 - 18:37:51 EST

On Jan 19, 2009 13:28 -0600, Dave Kleikamp wrote:
> ext[234] return a portion of the uuid in f_fsid. There is a theoretical
> chance of those values being non-unique. Since there doesn't appear to
> be any case for the fsid to be persistent between boots, I guess
> huge_encode_dev() is probably a better choice. In practice it probably
> makes no difference.

I'm not sure what you mean about "no case for fsid to be persistent"?
The whole point of fsid (for NFS) is that this identifies the filesystem
over reboot, even if the block device ID changes, or if the filesystem
doesn't have a block device at all (e.g. cluster filesystem).

Cheers, Andreas
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at