group.of.nepali.translators team mailing list archive

Thread
Date

[Bug 1682215] Re: [Hyper-V] mkfs regression in kernel 4.4+

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>
Date: Wed, 12 Apr 2017 19:30:23 -0000
Reply-to: Bug 1682215 <1682215@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
       Status: Incomplete => Triaged

** Changed in: linux (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: linux (Ubuntu Yakkety)
       Status: New => Triaged

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Yakkety)
   Importance: Undecided => High

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1682215

Title:
  [Hyper-V] mkfs regression in kernel 4.4+

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Related bug:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1657539

  This issue was fixed in Zesty, but also impacts the Xenial and Yakkety
  kernels. Can you please pull this patch back to Xenial+?

  https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-
  block.git/commit/?h=for-4.11/block&id=729204ef49ec00b788ce23deb9eb922a5769f55d

  author
  Ming Lei <ming.lei@xxxxxxxxxxxxx>
  2016-12-17 10:49:09 (GMT)
  committer
  Jens Axboe <axboe@xxxxxx>
  2017-01-12 03:47:08 (GMT)
  commit
  729204ef49ec00b788ce23deb9eb922a5769f55d (patch)
  tree
  ab5cc3c0aa17fa8b988ed7dfefe888000fac0be3
  parent
  1661f2e21c8bbf922dcb76faf2126a33ffe4cddb (diff)
  block: relax check on sg gap
  If the last bvec of the 1st bio and the 1st bvec of the next
  bio are physically contigious, and the latter can be merged
  to last segment of the 1st bio, we should think they don't
  violate sg gap(or virt boundary) limit.

  Both Vitaly and Dexuan reported lots of unmergeable small bios
  are observed when running mkfs on Hyper-V virtual storage, and
  performance becomes quite low. This patch fixes that performance
  issue.

  The same issue should exist on NVMe, since it sets virt boundary too.

  Reported-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
  Reported-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
  Tested-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
  Cc: Keith Busch <keith.busch@xxxxxxxxx>
  Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxxxxx>
  Signed-off-by: Jens Axboe <axboe@xxxxxx>

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682215/+subscriptions