On 08/05/2015 01:01 PM, Christoph Lameter wrote: > On Wed, 5 Aug 2015, Peter Zijlstra wrote: > >> On Wed, Aug 05, 2015 at 11:32:31AM -0500, Christoph Lameter wrote: >>> On Wed, 5 Aug 2015, Peter Zijlstra wrote: >>> >>>> I'll go have a look; but the obvious question is, what's the last known >>>> good kernel? >>> 4.0.9 according to the original report. >> Weird, there have been no changes to this area in v4.0..v4.1. > Rerunning this with "slub_debug" may reveal additional info. Maybe there > is some data corrupting going on. > OK, tried that (with no parameters though. Should I try some?). That got me a crash with a blank screen and no panic report. The thing is clearly touchy: small changes in memory positions make a difference. That's probably why I didn't get a panic message until 4.1.4: the gods have to all be looking in the right direction. One thing I did notice on the original report, though: > [ OK ] Deactivated swap /dev/dm-1. > [ OK ] Stopped ACPI event daemon. > [ OK ] Stopped LSB: Starts the GNUnet server at boot time.. > [ OK ] Stopped LSB: start Samba SMB/CIFS daemon (smbd). > [ OK ] Stopped LSB: start Samba daemons for the AD DC. > Stopping CUPS Scheduler... > Stopping LSB: start Samba NetBIOS nameserver (nmbd)... > [ OK ] Stopped CUPS Scheduler. > [ OK ] Stopped (null). > ------------[ cut here ]------------ Note the "Stopped (null)" before the "cut here" line. I wonder whether that has anything to do with the problem, or is it a red herring? .....Ron -- Ron Murray <rjmx@xxxxxxxx> PGP Fingerprint: 0ED0 C1D1 615C FCCE 7424 9B27 31D8 AED5 AF6D 0D4A -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href