Re: IMPORTANT: SysVinit & umounting

Roderich Schupp (rsch@ExperTeam.de)
Thu, 17 Sep 1998 23:57:06 +0200

miquels@cistron.nl (Miquel van Smoorenburg) said:
> If the rootfs cannot be unmounted (which is really remounted R/O)
> cleanly at shutdown with newer kernels, you should investigate the
> reason and fix the bug instead of guessing what is could be and
> inventing a workaround.

What's happening is that init still has mmaped a deleted version
of /etc/ld.so.cache (ldconfig deleted the old one when building
a new one). This deleted file which still has some live reference
prevents the RO remount of root.
Using -static linking fixes this (and also the case when you
just reinstalled your libc). Or you could still link dynamically, but with
"-Wl,-rpath,/lib". When ld-linux.so looks for libc, it first
checks the RPATH contained in the executable (if any). Failing that
it will mmap /etc/ld.so.cache and use the information there.
I'm using the latter and the dirty shutdowns have gone away :)

Cheers, Roderich

--
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Neben Amor
nie adretter
die Liebe grte!


Bier! Feten!
Gesegnete Freibetrge!
Bei Leid Retter da!


.. ein Roman eben.


Roderich Schupp                 mailto:rsch@ExperTeam.de
ExperTeam GmbH                  http://www.experteam.de/
Munich, Germany                 linux:2.1.122








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