On 09/11/2014 06:38 PM, Sasha Levin wrote: > On 09/11/2014 12:28 PM, Mel Gorman wrote: >> > Agreed. If 3.17-rc4 looks stable with the VM_BUG_ON then it would be >> > really nice if you could bisect 3.17-rc4 to linux-next carrying the >> > VM_BUG_ON(!(val & _PAGE_PRESENT)) check at each bisection point. I'm not >> > 100% sure if I'm seeing the same corruption as you or some other issue and >> > do not want to conflate numerous different problems into one. I know this >> > is a pain in the ass but if 3.17-rc4 looks stable then a bisection might >> > be faster overall than my constant head scratching :( > The good news are that 3.17-rc4 seems to be stable. I'll start the bisection, > which I suspect would take several days. I'll update when I run into something. I might need a bit of a help here. The bisection is going sideways because I can't reliably reproduce the issue. We don't know what's causing this issue, but we know what the symptoms are. Is there a VM_BUG_ON we could add somewhere so that it would be more likely to trigger? Thanks, Sasha -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>