kernel-packages team mailing list archive

[Dan Streetman <dan.streetman@xxxxxxxxxxxxx>]

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 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