tiomap-dev team mailing list archive

[Ming Lei <633227@xxxxxxxxxxxxxxxxxx>]

kernel : 2.6.38-rc4 + patch-v2.6.38-rc4-next-20110208.bz2 + fix_timer_lockdep_warning.patch(this attachment file)
config : see config.tar.gz of last attachment log.tar.gz


** Patch added: "fix_timer_lockdep_warning.patch"
   https://bugs.launchpad.net/ubuntu/+source/linux-ti-omap4/+bug/633227/+attachment/1851607/+files/fix_timer_lockdep_warning.patch

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https://bugs.launchpad.net/bugs/633227

Title:
  instabilities with highmem activated

Status in “linux-ti-omap4” package in Ubuntu:
  Confirmed
Status in “linux-ti-omap4” source package in Maverick:
  Fix Released
Status in “linux-ti-omap4” source package in Natty:
  Confirmed

Bug description:
  Seen on Maverick: 2.6.35-903.9
  HW: pandaboard ES2.0

  Using following kernel memory allocation (in bootargs):
  mem=460M@0x80000000 mem=512M@0xA0000000

  Instabilities have been observed in 2 different ways:

  1) The following memtester test:
  sudo memtester -p 0xb0000000 120
  Fails in few seconds with a "illegal instruction” error.
  Then various behaviors can be seen:  the UI can freeze, shell commands be unavailable. The systems works well again after a reboot.

  2) By doing a native build of a kernel package (with file-system on SD card, and kernel sources on an NFS mount):
  After 15mins to 1h30, a "compiler error: bus error" triggers and the build stops (and the platform hangs).

  
  This issue cannot be reproduced if using mem=460M@0x80000000 mem=256M@0xA000000.
  This issue cannot be reproduced with highmen deactivated from the kernel config.
  This issue can be reproduced with 'nosmp' in kernel command line.