[Chicken-hackers] On scheduler not handling bad fd's WAS: Re: 4.7.5 modified -> 4.8.2: heap full while resizing is back

[Jörg F . Wittenberger]

Just for the record:

the bad-fd's bug is pretty old.  I posted a first attempt to fix
it here:
http://lists.nongnu.org/archive/html/chicken-users/2008-08/msg00094.html

(Since these fixes never made it into the mainline,
I'm sitting on a modified chicken runtime ever since.
There are also a couple of other bugs and improvements I made
to scheduler.scm and sefi-18.scm since.  But they more or less
all depend - or at least are only tested against - the modified
version, since the mainline runtime was never able to run my
code base [or at least it was so crawling slow that I could
not stand it.)

On Mar 4 2013, Jörg F. Wittenberger wrote:

> Thanks Mario for your remark.
>
> However, the bug will not effect me.
>
> Let's say I don't remember whom I eventually sent my initial
> implementation as offered here
> http://lists.nongnu.org/archive/html/chicken-hackers/2012-05/msg00008.html
>
> The code I'm using since doesn't have that problem.
> Dunno how it came in.
>
> Thanks anyway.
>
> /Jörg
>
>
> On Mar 4 2013, Mario Domenech Goulart wrote:
>
> > Hi Jörg,
> >
> > On 04 Mar 2013 13:55:01 +0100 Jörg F. Wittenberger 
> > <address@hidden> wrote:
> >
> > > At 21 Oct 2011 I proposed some changes, which apparently have made it 
> > > half-way into the chicken core so far. See 
> > > http://lists.nongnu.org/archive/html/chicken-hackers/2011-10/msg00084.html
> > >
> > > At 19 Jun 2012 in 
> > > http://lists.nongnu.org/archive/html/chicken-hackers/2012-06/msg00051.html 
> > > I mentioned some more changes I made, which eventually made those "heap 
> > > full while resizing" go away. (I kept the mutation stack under a 
> > > limit.)
> > >
> > > Now with my compile upgrade I somehow killed this change (since
> > > parts of it apparently went into the core).
> > >
> > > However the problem is back.  I can't run my code for any reasonable
> > > amount of time.  While it runs almost forever with the modified
> > > 4.7.5 code within about 128MB of memory, it grows beyond any reasonable
> > > size in seconds again.
> > >
> > > I'll try to bring my changes back in locally.  But I'll need help
> > > to prepare diffs for integration.  Who's interested?
> >
> > Beware that chickens > 4.8.0 have a bug in the scheduler that affects 
> > Linux. See 
> > http://code.call-cc.org/cgi-bin/gitweb.cgi?p=chicken-core.git;a=commit;h=2a9696691c2792f981f0adfd46208d419eaad867 
> > for more information.
> >
> > The fix for that issue will probably be available in 4.8.0.3 soon.
> >
> > Best wishes.
> > Mario
>
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