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Date: Thu, 9 Mar 2017 23:48:20 +0100 From: Borislav Petkov <bp@...e.de> To: Daniel Borkmann <daniel@...earbox.net> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Kees Cook <keescook@...omium.org>, Laura Abbott <labbott@...hat.com>, Ingo Molnar <mingo@...nel.org>, Peter Anvin <hpa@...or.com>, Fengguang Wu <fengguang.wu@...el.com>, Network Development <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, LKP <lkp@...org>, ast@...com, the arch/x86 maintainers <x86@...nel.org>, "David S. Miller" <davem@...emloft.net> Subject: Re: [net/bpf] 3051bf36c2 BUG: unable to handle kernel paging request at 0000a7cf On Thu, Mar 09, 2017 at 11:11:17PM +0100, Daniel Borkmann wrote: > Yeah, I just tried that out and it had no effect unfortunately, the > static_cpu_has() was still 1. Right, just as I thought. I guess we could return to doing boot_cpu_has() in __flush_tlb_all() then. I mean, the timing-sensitivity argument is meh - killing global TLB entries a bit faster doesn't bring me a whole lot when I have to go and walk pagetable and reestablish them, which is the real price to pay anyway. Thanks. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --
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