Re: [PATCH] Linux-2.5 fix/improve get_pid()

[Padraig Brady]

Alan Cox wrote:
> On Mon, 2002-08-12 at 09:56, Padraig Brady wrote:
> 
>>Anyone care to clarify which filesystems don't
>>have unique inode numbers. I always thought you
>>could uniquely identify any file using a device,inode
>>tuple? Fair enough proc is "special" but can/should
>>you not assume unique inodes within all other filesystems?
> 
> 
> 2.4 functions correctly here in all the stuff I've looked at.

cool.

> I can't speak for 2.5. In the 2.4 case you must be holding the files open 
 > during the comparison. Some file systems like MSDOS invent inodes as
 > they go, never issuing the same one to two objects at the same time but
 > happily reissuing different inode numbers the next time around.

Sure, no hardlinks so who cares what the number is, as long
as it's unique.

> That breaks NFS but not much else

hmm..

thanks,
Pádraig.