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[Oliver Grawert <ogra@xxxxxxxxxx>]

** Also affects: linux-ti-omap4 (Ubuntu Natty)
   Importance: High
       Status: Confirmed

-- 
instabilities with highmem activated
https://bugs.launchpad.net/bugs/633227
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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.