Hi Il 22/set/2014 22:07 "Sam Hajian" <[email protected]> ha scritto: > > On Mon, Sep 22, 2014 at 3:51 PM, Gilles Chanteperdrix < > [email protected]> wrote: > > On 09/22/2014 09:49 PM, Sam Hajian wrote: > >>> As a general rule, turning debug options off to make bugs disappear is > >>> not really a good option, the sooner you catch a bug the better. Anyway, > >> I seems I was not clear, I said I tried 2 scenarios. I initially tried > >> IPIPE & LPAE and there was a null pointer dereference, as shown in the > >> log. > >> > >> [ 7.132601] Unable to handle kernel NULL pointer dereference at > >> virtual address 00000000 > >> [ 7.149256] pgd = c0003000, hw pgd = c0003000 > >> [ 7.158295] [00000000] *pgd=80000080004003, *pmd=00000000 > >> [ 7.169475] Internal error: Oops: 206 [#1] SMP ARM > >> > >> When I traced it, found that in debug code which is set by > >> CONFIG_SLUB_DEBUG. to confirm that when I had this flag off the null > >> pointer dereference was gone. But ran into other problem with invalid > >> paging request. > > > > How is that different to what I said? You turned off a debug option > > (CONFIG_SLUB_DEBUG) and made a bug disappear. > > > I just wanted to provide more info and be complete, that is all. I think my > second try with no debug shows that there are some problem with paging > request in MM code when LPAE in on but you are the expert. Anyway can you > please help.
I think that you can potentially mask an error that just happen before. Michael > > Saeid > _______________________________________________ > Xenomai mailing list > [email protected] > http://www.xenomai.org/mailman/listinfo/xenomai _______________________________________________ Xenomai mailing list [email protected] http://www.xenomai.org/mailman/listinfo/xenomai
