Re: [patch 1/7] Seq_file add support for sorted list

From: Mathieu Desnoyers
Date: Mon Sep 24 2007 - 13:53:08 EST

* Christoph Hellwig (hch@xxxxxxxxxxxxx) wrote:
> On Mon, Sep 24, 2007 at 12:49:51PM -0400, Mathieu Desnoyers wrote:
> > Add support for sorted list in seq_file. It aims at changing the way
> > /proc/modules and kallsyms iterates on the module list to remove a race between
> > module unload and module/symbol listing.
> >
> > The list is sorted by ascending list_head pointer address.
> While I think we really want this patch I don't quite see how it's
> related to the markers. I think patch 1 and 2 stand on their own.

As they are currently implemented, the markers use the sorted module
list for marker listing, but I can change their implementation so they
do not require this (and make it a subsequent patch instead).

I could do that to diminish the patchset size a little more. However, it
implies using an interface with a known race condition. Could we just
post this as two different patchsets instead ? I really think the sorted
module list would be important to get in and I don't like to use buggy
unfixed lower level functions.


Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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