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Date: Tue, 03 Sep 2002 11:30:24 -0400
From: Anton Lavrentiev <lavr@ncbi.nlm.nih.gov>
Organization: NCBI NIH
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To: Mark Hahn <hahn@physics.mcmaster.ca>
CC: vakatov@ncbi.nlm.nih.gov, linux-kernel@vger.kernel.org,
       torvalsd@transmeta.com
Subject: Re: BUG:: SYSV IPC shmem reported as "(deleted)" in process mapsfile
References: <Pine.LNX.4.33.0208311329390.21191-100000@coffee.psychology.mcmaster.ca>
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Mark Hahn wrote:
> 
> > /proc/#/maps file of a process, which has a shared memory segment attached,
> > prints the segment as "(deleted)" while in fact the segment is fine and sound.
> > This seems to be quite confusing.
> 
> perhaps to some.  on the other hand, it is deleted - a file that has no
> entry in any FS namespace.  what would you suggest as an alternative?
> 
> > cat /proc/#/maps:
> > 40018000-40022000 rw-s 00000000 00:05 5865476    /SYSV01315549 (deleted)

I would suggest to state such kind of mapping quite straightforward - as IPC shmem
(not as generic FS-like notation, which might be useful, but like I said, still
looks confusing), and to provide "(deleted)" only if the segment was actually
removed (from SYSV IPC point of view).
-
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