Re: dynamically allocating chunks from shared memory

From: Markus Wanner <markus(at)bluegap(dot)ch>
To: Greg Smith <greg(at)2ndquadrant(dot)com>
Cc: Alvaro Herrera <alvherre(at)commandprompt(dot)com>, PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: dynamically allocating chunks from shared memory
Date: 2010-07-22 15:01:47
Message-ID: 4C485D5B.2020405@bluegap.ch
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Greg,

On 07/22/2010 03:59 PM, Greg Smith wrote:
> There's a fairly good mapping of what techniques are patented and which
> were only mentioned in research in the Sun dynamic memory patent at
> http://www.freepatentsonline.com/7328316.html ; that mentions an earlier
> paper by the author of the technique Markus is using, but this was from
> before that one was written. It looks like Sun has a large portion of
> the patent portfolio in this area, which is particularly troublesome now.

Thanks for the pointer, very helpful.

Anybody ever checked jemalloc, or any other OSS allocator out there
against these patents?

Remembering similar patent-discussions, it might be better to not bother
too much and just go with something widely used, based on the assumption
that such a thing is going to enjoy broad support in case of an attack
from a patent troll.

What do you think? What'd be your favorite allocator?

Regards

Markus Wanner

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