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Content Tagged with User:bartman + linux
Kernel Walkthroughs - booting
Ian just posted the screen casts of the Linux Kernel Walkthroughs that I ran last week.
Linux Kernel Booting
I will be running another Linux Kernel Walkthrough for OCLUG at TheCodeFactory next week. This time the topic is "booting".
I am frantically preparing slides using (slightly modified) Rusty's svg to png presentation scripts. The svg's are naturally created in Inkscape, and the png's are useful because I can display them in a regular image viewer like gqview. I'll write more on this later.
USB2.0 enclosure benchmark
I've noticed my laptop disk filling up... particularly in $HOME/work/*. Lots
of little contracts, each involving at least the linux kernel tree of one
vintage of another, are to blame.
To solve this, I decided to pickup an external drive. I am using USB 2.0, because my laptop, Thinkpad x41, has no eSATA or even firewire. So I cannot compare the performance over another connection, but I can have a look at which filesystem (xfs or ext3) will perform my workloads best.
Linux Kernel Walkthroughs posted
Ian just posted the screen casts of the Linux Kernel Walkthroughs that I ran last week.
Here is the same video on google/video... it's a lot lower rez :(
Authenticating Linux against OSX LDAP directory
I was recently asked by a colleague, and now also a client, to look over the LDAP configuration on his Ubuntu boxen. He was having
issues with the root account. The problem turned out being that the Ubuntu box was trying to get the root authentication from LDAP.
It successfully found an LDAP account on the OSX LDAP server, but was unable to login since that account is disabled. The solution
was to filter out the root account from the LDAP reply using the pam_filter directive in /etc/ldap.conf. Jay was also kind enough
to document his setup for others that are trying to accomplish a
similar task.
side note: Jay briefly showed me his OSX/Linux integration... looks pretty cool. Particularly the LDAP directory and automount of OSX exported volumes for users. OSX seems to make certain things really easy.
fixing X for GeodeLX
Recently I have been doign a bit of contract work for Symbio Technologies. They have had me do various little projects part time. Most recently I got a chance to work on X.org video drivers for the Geode family.
Here is the progress...
kvm nfs hang
I ran into a strange NFS + KVM issue. Every so often under heavy NFS load my KVM client would hang retrying the nfs server. On the console the client was showing:
nfs: server host not responding, still trying
I found this bug post which does not seem to have been resolved in 2.6.24.
Using the kvm flag -net nic,model=rtl8139 fixed the problem for me.
Linux Kernel Walkthroughs
I will be kicking off a new series of talks at OCLUG later this month. The idea is not mine, but a copy of a similar series ran by Silicon Valley Linux Users Group. Kudos to them!
Here is the info on the first Kernel Walkthrough: Source Tree Layout. I will start off by covering the tree structure and talk a bit about the components, before handing control of the talk over to the audience and let them drive the types of things they would like to explore.
We are being hosted by the TheCodeFactory, which is a very cool concept. From the website:
"TheCodeFactory is a collaborative work space located in downtown Ottawa at 246 Queen Street, between Bank and Kent, above the Green Papaya Restaurant. TheCodeFactory is a clubhouse or water cooler for the Start-up community in Ottawa."
In short they are a place where startups can meet and collaborate way before they have any office space of their own. Ottawa being such a hotspot for startups, this is clearly a good idea.
is my usb device connected to a fast port?
I started a transfer last night to copy a 700M file to my USB key. It's still going. I figured that it might have been OHCI vs EHCI issue. I had to remind myself how to check.
