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Date: Tue, 12 Jun 2018 20:26:46 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Wanpeng Li <kernellwp@...il.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Thomas Richter <tmricht@...ux.ibm.com>, Kees Cook <keescook@...omium.org> Cc: Paolo Bonzini <pbonzini@...hat.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Radim Krčmář <rkrcmar@...hat.com>, KVM list <kvm@...r.kernel.org> Subject: Re: [GIT PULL] KVM changes for 4.18 merge window On Tue, Jun 12, 2018 at 8:00 PM Linus Torvalds <torvalds@...ux-foundation.org> wrote: > > Yeah, the biusection seems to actually be diving into Greg's device pulls. > > Odd. I'm not seeing why that would break kvm, but maybe there's > something in the device core layer that really messed it up. > > I'll continue to bisect to see. Ok, so commit 95cde3c59966 ("debugfs: inode: debugfs_create_dir uses mode permission from parent") breaks lkvm, and I think qemu-kvm too. The commit looks like the RightThing(tm) to do, but we do not break existing work-flows, no matter how much we'd like to. So it gets reverted. Greg, Thomas, perhaps some alternative model? I'm not sure exactly what kvm needs from debugfs. Linus
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