Linked by diegocg on Mon 1st Oct 2012 16:52 UTC
Linux Linux kernel 3.6 has been released. There are new features in Btrfs: subvolume quotas, quota groups and snapshot diffs (aka "send/receive"). It also includes support for suspending to disk and memory at the same time, a TCP "Fast Open" mode, a "TCP small queues" feature to fight bufferbloat; support for safe swapping over NFS/NBD, support for the PCIe D3cold power state; and VFIO, which allows safe access from guest drivers to bare-metal host devices. Many small features and new drivers and fixes are also available. Here's the full list of changes
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RE: Comment by diegocg
by Fergy on Mon 1st Oct 2012 20:03 UTC in reply to "Comment by diegocg"
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One of the most interesting changes, from a "philosophical" point of view, is VFIO, because it allows to create safe and fast user-space drivers. So people who likes microkernels don't even need to write a OS from scratch to do experiments.

Does that mean you can write drivers that don't need to be compiled for each kernel?

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RE[2]: Comment by diegocg
by Lennie on Mon 1st Oct 2012 22:09 in reply to "RE: Comment by diegocg"
Lennie Member since:

I'm not sure yet, I've seen people ask the same thing in an other forum, but no1 answered.

I believe it is meant for virtualization. To allow a virtual machine fast/direct access to a certain piece of hardware (like a dedicated networking chip).

First of all you'd need hardware which supports isolation userspace processes to a certain piece of I/O memory (DMA).

Here is the documentation by the author:

I wonder if it could be used for something like Netmap:

Edited 2012-10-01 22:28 UTC

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