Software Patents examples - Tasks: task #222, Withdrawl of Open Source NDS...
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task #222: Withdrawl of Open Source NDS Project/NTFS/M2FS forLinux
Submitter: | Hugo Gayosso <hgayosso> | ||
Submitted: | - | ||
Category: | Patent Database | Should Start On: | Wed 06 Jun 2001 04:00:00 AM UTC |
Should be Finished on: | Sun 10 Jun 2001 04:00:00 AM UTC | Priority: | 5 - Normal |
Status: | None | Privacy: | Public |
Percent Complete: | Any | Assigned to: | rubini |
Open/Closed: | Open | Effort: | 0.00 |
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From: Richard Stallman <rms@gnu.org>
Subject: Patent covering sendfile
To: -email is unavailable-
Date: Wed, 10 Jan 2001 17:39:29 -0700 (MST)
Reply-to: -email is unavailable-
> I know little about it. I believe that Microsoft have a patent on the idea
> behind the sendfile() system call - sending a large amount of data from a
> file without continuous context switches to userspace for read() then
> write().
>
> Can you point me at someone who knows more about this?
Not really, but the patent in question is:
http://www.delphion.com/details?pn=US05845280__
I looked at the patent and it really does cover the sendfile
system call.
It seems unlikely that nobody did this before 1995. I suspect that
similar ideas can be found in the past. But I don't remember
one specifically.