Great! I'll test the patch as soon as possible, but, unfortunately, not before 12th October.
On 10/2/08, Gilles Chanteperdrix <[EMAIL PROTECTED]> wrote: > Gilles Chanteperdrix wrote: >> Gilles Chanteperdrix wrote: >>> Gilles Chanteperdrix wrote: >>>> Richard Cochran wrote: >>>>> I posted this patch today on linux-arm-kernel, but I repeat it >>>>> here because there does not seem to be too much interest on that >>>>> list for the ARM FCSE. >>>>> >>>>> I also tried to combine this patch with ipipe for kernel 2.6.20 >>>>> running on the Intel IXDP465, but after booting I soon get a BUG. >>>>> >>>>> Anyhow, perhaps the ARM people might take a look at combining >>>>> ipipe with FCSE... >>>> Ok. Six monthes later, I finally gave a try to your patch on at91rm9200, >>>> which supports FCSE as well. >>>> >>>> When booting, I get random segmentation faults (either with or without >>>> the I-pipe), assertion which fails in glibc, and such things. >>> A small update: I get the same random failures with a vanilla kernel >>> (without I-pipe patch at all). >>> >>> I will now investigate pmd_populate. >> >> Hi Richard, >> >> I changed a few bits here and there in your patch, but I believe the >> biggest problem was that Linux seem to recycle pids faster than it >> recycles mm_struct, so we ended up with processes sharing the same >> space, and since the pid allocation mechanism was a bit too naive for >> multi-threaded applications, I changed it to a bitfield based solution. >> I now have an FCSE kernel which seems much more stable (and without the >> double mapping either). This is the good news. >> >> The bad news is that I still get mysterious crashes. So, will now >> investigate. > > Hi, > > found the reason for the crash. The system seems to run stable now. > Here comes the patch. > > Could you test it and confirm that there is no problem for you ? > Bosko: could you test it for arm926 ? I made the needed change in > arch/arm/mm/proc-arm926.S, but did not check it yet. > The patch is for vanilla Linux, I did not retest it with Xenomai yet > (though I tested the previous version with the random crashes, and > observed a 200us user-space latency instead of the usual 300us). > > Regards. > > -- > Gilles. > -- Sent from Gmail for mobile | mobile.google.com _______________________________________________ Adeos-main mailing list [email protected] https://mail.gna.org/listinfo/adeos-main
