On Fri, 2011-05-06 at 16:44 +0100, Mel Gorman wrote: > Colin and James: Did you happen to switch from SLAB to SLUB between > 2.6.37 and 2.6.38? My own tests were against SLAB which might be why I > didn't see the problem. Am restarting the tests with SLUB. Aargh ... I'm an idiot. I should have thought of SLUB immediately ... it's been causing oopses since debian switched to it. So I recompiled the 2.6.38.4 stable kernel with SLAB instead of SLUB and the problem goes away ... at least from three untar runs on a loaded box ... of course it could manifest a few ms after I send this email ... There are material differences, as well: SLAB isn't taking my system down to very low memory on the untar ... it's keeping about 0.5Gb listed as free. SLUB took that to under 100kb, so it could just be that SLAB isn't wandering as close to the cliff edge? James -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>