I’ve been posting a lot of “hey test this new technology” items, lately. That’s good. Since I haven’t done it already, here’s a description of AHCI.
If you want to try either one (warning: many parts still broken!), use a vkernel for the devfs so a physical system doesn’t get broken. There’s build instructions for pulling together AMD64 DragonFly.
Update: manual instructions for AMD64, too.
As Hasso Tepper says, please don’t bring in any major changes until after DragonFly’s 2.4 release. This is mostly for the benefit of pkgsrc, so that we can have as complete a working set of packages as possible at release time. 2.4 will probably be in July.
While asking some questions, Alex Hornung let drop some of the details of his Summer of Code devfs project. Sounds like he’s making good progress.
Huawei modems, often available as USB attachments, have been problematic on DragonFly. However, it looks like it’s fixed. (I dont have one to test.) There’s a lot of names involved, so I’ll just point to the commit message.
When DragonFly was moving away from CVS, the votes were split pretty evenly between Git and Mercurial. DragonFly went to Git, but it’s apparently now possible to use Mercurial with a Git repository.
Statis Kamperis is working on POSIX conformance for DragonFly as his Summer of Code project; he’s posted some questions about the agreement he is given for the Open Group’s test suites. If you’re curious, he links to a copy of the agreement. (I have an I-am-not-a-lawyer-but-have-worked-on-a-number-of-contracts followup)
Hasso Tepper has a “BIG FAT WARNING” about two new issues: threaded programs are broken on bleeding-edge DragonFly because of a possible GCC bug that was only recently exposed, and Xorg in pkgsrc has issues with the Intel driver.
Simon ‘corecode’ Schubert already has one change in that may fix the issue with threaded programs, and is working on the Intel driver issue.
Update: more threading changes.
Dan Chis has posted a summary of his Summer of Code project: debugging multi-threaded applications. He also has some details of his current thesis in there… He’s busy.
Hasso Tepper has some xorg updates to fix problems he’s seen with the intel video driver. The versions of these packages in pkgsrc are old enough that the changes can’t be committed ‘upstream’ to xorg, so he’s attacking the problem from the opposite direction and upgrading the software.
He reported significant EXA performance improvements, so it’s definitely worthwhile. It’s tested on DragonFly but will probably benefit other pkgsrc-using platforms too.
Sepherosa Ziehau’s recent commit changing how ioapic works may help anyone who has previously had trouble compiling a multiprocessor kernel with IO_APIC enabled. Try it, if that applies to you.
Also, Jordan Gordeev has a potential fix for anyone who has had a failed boot with a ‘BTX Halted’ message; you will have to retrieve it from his Git repo.