On Mon, Dec 2, 2024 at 2:01 AM Dmitry Dolgov <9erthali...@gmail.com> wrote: > > One side note, I think it would be great to properly cite the white > paper the patch is referring to. Besides paying some respect to the > authors, it will also make it easier to actually find it. After a quick > search I found only some references to [1], but this link doesn't seem > to be available anymore.
I found an archive: https://web.archive.org/web/20220802143127/https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/crc-iscsi-polynomial-crc32-instruction-paper.pdf One thing I noticed is this part: "The basic concepts in this paper are derived from and explained in detail in the patents and pending applications [4][5][6]." ... [4] Determining a Message Residue, Gopal et al. United States Patent 7,886,214 [5] Determining a Message Residue Gueron et al. United States Patent Application 20090019342 [6] Determining a Message Residue Gopal et al. United States Patent Application 20090158132 Searching for the first one gives https://patents.google.com/patent/US20090019342 which says "Status Expired - Fee Related 2029-09-03 Adjusted expiration" On the other hand, looking at Linux kernel sources, it seems a patch using this technique was contributed by Intel over a decade ago: https://github.com/torvalds/linux/blob/master/arch/x86/crypto/crc32c-pcl-intel-asm_64.S So one more thing to ask our friends at Intel. -- John Naylor Amazon Web Services
