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Submission + - SPAM: Performance comparison between Linux in-kernel SMB server and Samba.

Jeremy Allison - Sam writes: "ksmbd" is a new Linux kernel module which implements an SMB server. It's aimed at being low overhead, low footprint, performant fileserver covering many basic use-cases.

ksmbd claims performance improvements on a wide range of benchmarks: the graphs on this page show a doubling of performance on some tests.

Clearly, those number are impressive, but at the same time recent improvements in Samba's IO performance put this into perspective: by leveraging the new "io_uring" Linux API Samba is able to provide roughly 10x the throughput compared to ksmbd.

[spam URL stripped]...

Link to Original Source

Comment Re:More links.. (Score 1) 65

Have you actually *read* the GPLv2 ? I'm assuming not based on your statement. The GPLv2 text is here:

https://www.gnu.org/licenses/o...

Please note the following statement copied *DIRECTLY FROM THE TEXT ABOVE*:

"The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable."

Please note the last sentence containing the words: "plus the scripts used to control compilation and installation of the executable."

Thanks for your reading comprehension.

Comment More links.. (Score 5, Informative) 65

I didn't have these handy when I posted this originally.

PDF of the full legal complaint. It's really nicely written (IMHO) and IANAL of course :-).

https://sfconservancy.org/docs...

Press kit:

https://shoestring.agency/wp-c...

Really nice non-technical write up from sjvn (yeah I know /. is a technical crowd, but it's nice to be able to have something to use to explain to non-technical friends):

https://www.zdnet.com/article/...

Submission + - Software Freedom Conservancy files GPL lawsuit against Visio (sfconservancy.org)

Jeremy Allison - Sam writes: Software Freedom Conservancy announced today it has filed a lawsuit against Vizio Inc. for what it calls repeated failures to fulfill even the basic requirements of the General Public License (GPL).

The lawsuit alleges that Vizio’s TV products, built on its SmartCast system, contain software that Vizio unfairly appropriated from a community of developers who intended consumers to have very specific rights to modify, improve, share, and reinstall modified versions of the software.

Comment Re:Not on ARM (Score 4, Interesting) 47

> The ARM reference design offers a guarantee that such side channels don't exist.

Nonsense. All modern CPUs have speculative execution side channels by nature. The only way to protect against these attacks is to change how we write software to insert speculation barriers in security-critical code paths.

The difference is that Intel doesn't just have speculative execution side channels, they had a pile of critical *security domain crossing* speculative execution side channels. All CPUs can leak data in speculation from your process into the side channel (which might be monitored by another process), but Intel has a pile of bugs which can leak data from *a completely different, innocent process*, or even the kernel (meltdown), or a VM hypervisor (L1TF). Those aren't inherent in CPU design, those are a result of what is clearly a major culture issue inside Intel.

> Spectre and Meltdown bed to differ.

Spectre and Meltdown are not covert channel issues. Spectre is a collection of speculative execution *side channel* issues, and Meltdown is a privilege domain crossing speculative execution *side channel* (the only one that hit other CPUs as well as Intel IIRC; other than Meltdown I think Intel has a monopoly on goofs this bad, e.g. L1TF). Covert channels are not the same thing as side channels, as they require cooperation from both sides.

Submission + - SPAM: Samba clarification around GPL and VFS modules.

Jeremy Allison - Sam writes: People who follow Samba development may
have noticed the following commit that
just went into the Samba repo:

[spam URL stripped]...

For people who don't read git (I'm assuming
that's everyone :-) it's a clarification
around GPL license boundaries and Samba
VFS modules we've been discussing within
the Team for a long while now.

Here's the text of the new file so people
can understand what we're doing here.

Hopefully this will make it much clearer
to OEMs and vendors using Samba where their
GPL requirements begin and end when extending
Samba to work with their own unique filesystem
technology.

Cheers,

Jeremy.

----------------------------------------------------
A clarification of the GNU GPL License boundary within the Samba
Virtual File System (VFS) layer.

Samba is licensed under the GNU GPL. All code committed to the Samba
project or creating a derived work must be either licensed under the
GNU GPL or a compatible license.

Samba has several plug-in interfaces where external code may be called
from Samba GNU GPL licensed code. The most important of these is the
Samba VFS layer.

Samba VFS modules are intimately connected by header files and API
definitions to the part of the Samba code that provides file services,
and as such, code that implements a plug-in Samba VFS module must be
licensed under the GNU GPL or a compatible license.

However, Samba VFS modules may themselves call third-party external
libraries that are not part of the Samba project and are externally
developed and maintained.

As long as these third-party external libraries do not use any of the
Samba internal structure, APIs or interface definitions created by the
Samba project that are licensed under the GNU GPL then it is the view
of the Samba Team that such third-party external libraries called from
Samba VFS modules are not part of the Samba code and cannot be
considered a derived work of Samba for the purposes of GNU GPL
licensing. Thus such libraries are not required to be under the GNU
GPL or a GNU GPL compatible license.
----------------------------------------------------

Link to Original Source

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