[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-08 Thread Christopher M. Penalver
Pavol Domin, in order to maximize the probability of upstream addressing this issue as fast as possible, you would want to fully commit bisect from kernel 3.19 to 4.2 in order to identify the last good kernel commit, followed immediately by the first bad one. Could you please do this at your conven

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-08 Thread Christopher M. Penalver
** Tags added: latest-bios-2102 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1531951 Title: A severe performance degradation while syncing md raid after the upgrade to 15.10 Status

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-08 Thread Joseph Salisbury
If we don't receive any feedback from upstream, we can perform a kernel bisect to identify the commit that introduced the regression. ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged -- You received this bug notification because you are a member of Kernel Packages, which is subs

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-08 Thread Joseph Salisbury
This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug. Please follow the instructions on th

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-07 Thread Pavol Domin
Tested with the mainline kernel: the bug is reproducible also in 4.4.0-040400rc8-generic. ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is su

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-07 Thread Joseph Salisbury
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.4 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix th

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-07 Thread Joseph Salisbury
If the mainline kernel does not exhibit the bug, we can perform a reverse bisect to find the fix. If the bug does still exist in mainline, we can perform a regular bisect to identify the commit that introduced this regression. ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete

[Kernel-packages] [Bug 1531951] Re: A severe performance degradation while syncing md raid after the upgrade to 15.10

2016-01-07 Thread Alberto Salvia Novella
** Changed in: linux (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1531951 Title: A severe performance degradation while syncing md raid after