OASIS Virtual I/O Device (VIRTIO) TC

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[OASIS Issue Tracker] (VIRTIO-144) VIRTIO_BLK_F_CONFIG_WCE removed from block devices spec

  • 1.  [OASIS Issue Tracker] (VIRTIO-144) VIRTIO_BLK_F_CONFIG_WCE removed from block devices spec

    Posted 07-01-2015 22:40
    Paolo Bonzini created VIRTIO-144: ------------------------------------ Summary: VIRTIO_BLK_F_CONFIG_WCE removed from block devices spec Key: VIRTIO-144 URL: https://issues.oasis-open.org/browse/VIRTIO-144 Project: OASIS Virtual I/O Device (VIRTIO) TC Issue Type: Bug Affects Versions: virtio 1.0 cs02 Reporter: Paolo Bonzini Priority: Critical VIRTIO_BLK_F_CONFIG_WCE is important in order to achieve good performance (up to 2x, though more realistically +30-40%) in latency-bound workloads. However, it was removed by mistake together with VIRTIO_BLK_F_FLUSH. The lack of this feature means that virtio 1.0 cs02 does not achieve parity with 0.9. -- This message was sent by Atlassian JIRA (v6.2.2#6258)


  • 2.  Re: [virtio] [OASIS Issue Tracker] (VIRTIO-144) VIRTIO_BLK_F_CONFIG_WCE removed from block devices spec

    Posted 07-02-2015 07:08
    On Wed, Jul 01, 2015 at 10:40:21PM +0000, OASIS Issues Tracker wrote: > Paolo Bonzini created VIRTIO-144: > ------------------------------------ > > Summary: VIRTIO_BLK_F_CONFIG_WCE removed from block devices spec > Key: VIRTIO-144 > URL: https://issues.oasis-open.org/browse/VIRTIO-144 > Project: OASIS Virtual I/O Device (VIRTIO) TC > Issue Type: Bug > Affects Versions: virtio 1.0 cs02 > Reporter: Paolo Bonzini > Priority: Critical > > > VIRTIO_BLK_F_CONFIG_WCE is important in order to achieve good performance (up to 2x, though more realistically +30-40%) in latency-bound workloads. However, it was removed by mistake together with VIRTIO_BLK_F_FLUSH. > > The lack of this feature means that virtio 1.0 cs02 does not achieve parity with 0.9. > > > > -- > This message was sent by Atlassian JIRA > (v6.2.2#6258) Some notes on using jira: it's ok to create any amount of new issues but they need to be open before we'll vote on them. Before that point, you need to - set environment to list the reporter. - set proposal to a quick summary of the change + link to mailing list posting. - set fixed-in to version which should include the fix in your opinion - make issue open > --------------------------------------------------------------------- > To unsubscribe from this mail list, you must leave the OASIS TC that > generates this mail. Follow this link to all your TCs in OASIS at: > https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php