Kernel

Before reporting this to the list, I would first gather enough information.

Alu’s server boxes is suffering in continued reboot when server is loaded. Because he is supporting FreeBSD by utilizing 5.3-RC1 in his production environment (and it’s moderately loaded as it is connected to the ChinaNet Backbone), and donated many devices for dedicated services of the FreeBSD China Community, I think we must help him to solve these out.

I have plugged a new kernel configuration on his box in order to obtain a (potential) crashdump and figure out what is happening. Maybe we will get it tomorrow.

From the commit log:

Close an interrupt race between vm_page_lookup() and (typically) a vm_page_sleep_busy() check by using the correct spl protection. An interrupt can occur inbetween the two operations and unbusy/free the page in question, causing the busy check to fail and for the code to fall through and then operate on a page that may have been freed and possibly even reused. Also note that vm_page_grab() had the same issue between the lookup, busy check, and vm_page_busy() call.

Shortly after OpenBSD’s 3.5 splash web, Matthew Dillon has released a thrid “known stable” iso for DragonFlyBSD. It can be obtained from ftp://ftp.dragonflybsd.org/iso-images/dfly-20040502.iso.gz.

This snapshot included many new features, yet stable:

As planned before, I am now downloading DragonFlyBSD’s live iso and tend to install it soon.

junsu and I have discussed about some big hacks to FreeBSD kernel, and the implementation of a minidump is a good idea, I think.

On Windows there’s a minidump mechanism. The minidump will save ‘crashing’ pages only, while full dump will save the whole core memory when the system going to crash.

It’s important to have a scientific view when doing any benchmarks. Today, phk and Robert Watson has posted several hints to the -current list.

Recently there were several important developments taken place in DragonflyBSD.

We saw:

Today folks at FreeBSDChina suggested me to have an interview with FreeBSD’s David XU (Yifeng XU), who is an active committer, and possibly the only src committer living in the mainland China.