kernel-packages team mailing list archive

["dave.muysson" <dave.muysson@xxxxxxxxx>]

Dan,

  I haven’t tried to directly reproduce the bug, but I have a few ideas.
If I can free up some time I’ll see if I can reproduce it.


Dave Muysson | Cloud Architect
dave.muysson@xxxxxxxxx <mailto:dave.muysson@xxxxxxxxx> |​ (613) 562-2525 x 510 <tel:6135622525,510> |​ 360pi.com <http://360pi.com/>


> On Oct 13, 2015, at 9:20 AM, Dan Streetman <dan.streetman@xxxxxxxxxxxxx> wrote:
> 
> Hi Dave,
> 
> are you able to reproduce the bug?  The trace by itself isn't terribly helpful, all it really says is the pageblock spans zones, which means move_freepages_block() logic for detecting that failed for some reason.  I have a debug kernel ppa here:
> pad.lv/ppa/ddstreet/lp1497428
> 
> that includes additional debug if the problem happens (it also should
> prevent the BUG()).  If you can use that kernel to trigger this and send
> the resulting debug output it would help very much :-)
> 
> when the problem reproduces, in the system log you should see:
> page_zone(start_page) !=page_zone(end_page)
> 
> and more debug following that.  It should not trigger BUG() though, so
> you may need to check the logs periodically.
> 
> Thanks!
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1497428
> 
> Title:
>  kernel BUG at /build/buildd/linux-3.13.0/mm/page_alloc.c:968
> 
> Status in linux package in Ubuntu:
>  In Progress
> Status in linux source package in Trusty:
>  In Progress
> 
> Bug description:
>  The kernel triggers a BUG when it finds it is in move_freepages() but
>  the start and end pfns for the move are in different zones.
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1497428/+subscriptions

-- 
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/1497428

Title:
  kernel BUG at /build/buildd/linux-3.13.0/mm/page_alloc.c:968

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress

Bug description:
  The kernel triggers a BUG when it finds it is in move_freepages() but
  the start and end pfns for the move are in different zones.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1497428/+subscriptions