PoC: passive serialization
Poul-Henning Kamp
phk at phk.freebsd.dk
Mon Jun 23 06:08:48 UTC 2014
In message <53A7A2D6.30905 at freebsd.org>, Julian Elischer writes:
>On 6/22/14, 7:18 AM, Mindaugas Rasiukevicius wrote:
>>
>> Just a note on passive serialization in NetBSD: there is a lot of space for
>> optimisations, simplifications or improvements to that code, but it was a
>> deliberate choice to avoid them. The goal was to carefully implement the
>> logic described in the expired patent (or at least attempt to be as close as
>> our interpretation skills allow us to be). Any deviation from that logic
>> increases the risk of falling under some other technique, primarily RCU,
>> covered by other patent.
>>
>hopefully the recent ruling on software patents may make the whole
>thing moot given enough impetus.
Probably not in this case.
This bite from page 3 seems like the gate through which RCU and similar
patents will go:
"They do not, for example, purport to improve the functioning
of the computer itself"
But read for yourself:
http://www.supremecourt.gov/opinions/13pdf/13-298_7lh8.pdf
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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