Messages in this thread | | | Date | Sat, 15 Sep 2012 11:26:23 +0200 | From | Sasha Levin <> | Subject | Re: [PATCH 6/7] mm: add CONFIG_DEBUG_VM_RB build option |
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On 09/15/2012 02:00 AM, Michel Lespinasse wrote: > All right. Hugh managed to reproduce the issue on his suse laptop, and > I came up with a fix. > > The problem was that in mremap, the new vma's vm_{start,end,pgoff} > fields need to be updated before calling anon_vma_clone() so that the > new vma will be properly indexed. > > Patch attached. I expect this should also explain Jiri's reported > failure involving splitting THP pages during mremap(), even though we > did not manage to reproduce that one.
Initially I've stumbled on it by running trinity inside a KVM tools guest. fwiw, the guest is pretty custom and isn't based on suse.
I re-ran tests with patch applied and looks like it fixed the issue, I haven't seen the warnings even though it runs for quite a while now.
Thanks, Sasha
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