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Re: gcl/acl2 2.6-15

Greetings, and thanks for looking into this.

Gerhard Tonn <GerhardTonn@gammatau.de> writes:

> On Tuesday 19 November 2002 17:56, Camm Maguire wrote:
> > Greetings!  I've built this package successfully on trex several times,
> > yet the autobuilder has failed twice in the same place with an
> > effective segfault.  Is something different on the autobuilding
> > machine l003092?
> >
> The only difference seems to be the kernel version. I will check this and let 
> you know. 
> > Separately, I've noticed that trex is now running kernel 2.4.x, in
> > which the known mprotect bug has been reportedly fixed.  GCL can use
> > more efficient garbage collection on such machines, but currently has
> > no way of detecting 2.2 kernels at runtime and using the slower gc.
> > Is it safe to assume now that the vast majority of machines running
> > Debian on this arch will be using 2.4.x now, and that a simple note in
> > README.Debian coupled with an enabling of the stratified garbage
> > collection is now advisable?
> >
> The problem was not the 2.2 kernel but a bug in an earlier 2.4 kernel. This 
> may be somehow related to your first item.

Alas, the stratified GC, using a trapped segfault/mprotect scheme,
fails on trex, which is using 2.4.17.  Does this version still have
the bug?  In any case, since some 2.4.x is still affected, maybe it
would be wise simply to disable this.

Take care,

> Gerhard 

Camm Maguire			     			camm@enhanced.com
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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