Messages in this thread | | | Date | Mon, 06 Aug 2007 10:55:44 +0200 | From | John Sigler <> | Subject | Re: Old -rt patches |
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John Sigler wrote:
> I wrote a Linux app where I need high-resolution timers. I went all the > way and installed the -rt patch, which includes the -hrt patches, as far > as I understand. > > Since I could not afford to change kernels with every new release, I > decided to track the 2.6.20 branch (arbitrarily). > > At this point I'm using 2.6.20.7-rt8 (-rt8 was the last patch to the > 2.6.20 branch). (I see 2.6.20 is already up to .15) > > I see a lot of patches going into the -rt patch, but development moved > on to 2.6.21, then 2.6.22, and now 2.6.23, following mainline. > > I'm not a kernel hacker, so I don't claim to understand the patches, but > the comments sound like a few bugs are fixed here and there. I can't > tell whether these bugs also exist in previous kernels or only appeared > in newer kernels. Even if I knew, I probably wouldn't have the expertise > to back-port the patch. > > I'm seeing weird behavior in my app, when it has been running 2-4 days. > The timers start to act out, and all hell breaks loose. Basically, I > have no idea what's going on... > > My question is: is it possible that there is a bug in 2.6.20-rt8 that > has been fixed in subsequent -rt patches (there's a 2.6.21.6-rt21 and a > 2.6.22.1-rt9)? In other words, if I give 2.6.21.6-rt8 or 2.6.22.1-rt9 a > spin, is it possible that my weird behavior disappears? > > I'm not saying that it's impossible for the bug to be in my app, but the > app is small enough that I'm fairly confident there's no problem there.
Would anyone care to comment?
Perhaps I could also test a different strategy, such as xenomai? http://www.xenomai.org/
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