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[Bug 1188010] Re: [Feature] Accelerated CRC-T10DIF checksum for the SCSI layer

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Tim Gardner <tim.gardner@xxxxxxxxxxxxx>
Date: Tue, 24 Sep 2013 02:55:21 -0000
Reply-to: Bug 1188010 <1188010@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: linux (Ubuntu Saucy)
       Status: Triaged => In Progress

** Changed in: linux (Ubuntu Saucy)
     Assignee: (unassigned) => Tim Gardner (timg-tpi)

** Changed in: linux (Ubuntu Saucy)
       Status: In Progress => Fix Committed

** Information type changed from Private to Public

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https://bugs.launchpad.net/bugs/1188010

Title:
  [Feature] Accelerated CRC-T10DIF checksum for the SCSI layer

Status in intel:
  New
Status in “linux” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Saucy:
  Fix Committed

Bug description:
  The current CRC-T10DIF checksum is computed using a table lookup. By using PCLMULQDQ and SSE instructions available in Sandy
  Bridge and later CPUs, the checksum computation speed can be sped up by 8x and more, improving the throughput for Solid State Drive and also new NVM express products.

  Upstream schedule: kernel 3.12

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