Zack's Kernel News

m68k Revitalized Under git

Geert Uytterhoeven announced a new git repository for the m68k Linux port, replacing a defunct CVS repository. He also posted a patch to add a make install compilation target for the m68k build and posted several other m68k updates as well.

MSI HOWTO Rewrite

Matthew Wilcox has rewritten the MSI HOWTO, the first major rewrite since 2004. MSI (or Message Signaled Interrupts) provide PCI devices with an alternative to traditional interrupts that require the existence of a hardware pin on the device. MSI lets the device trigger an interrupt simply by writing data to a specific memory address. Randy Dunlap and Sitsofe Wheeler offered some feedback on the prose, and Matthew updated the doc because of it. Grant Gundler and Michael Ellerman had more technical feedback, which they discussed with Matthew. Ultimately it looks as though this is a welcome rewrite, with all in favor.

Controlling Tracepoints

Steven Rostedt has posted a patch to ftrace, providing a simple interface for users to enable and disable any tracepoint that already exists in the kernel. The new /debug/tracing/available_events file lists all tracepoints available for tracking, whereas the /debug/tracing/set_event can be modified to list the events you want to enable or disable.

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