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Date: Tue, 18 Jun 2013 19:20:37 -1000
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Subject: Re: [PATCH] mm: fix up a spurious page fault whenever it happens
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Stanislav Meduna <stano@meduna.org>
Cc: Rik van Riel <riel@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Steven Rostedt <rostedt@goodmis.org>,
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        Hai Huang <hhuang@redhat.com>
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On Tue, Jun 18, 2013 at 9:13 AM, Stanislav Meduna <stano@meduna.org> wrote:
>
> No crash in 2 days running with preempt none...

Is this UP?

There's the fast_tlb race that Peter fixed in commit 29eb77825cc7
("arch, mm: Remove tlb_fast_mode()"). I'm not seeing how it would
cause infinite TLB faults, but it definitely causes potentially
incoherent TLB contents. And afaik it only happens with
CONFIG_PREEMPT, and on UP systems. Which sounds like it might match
your setup...

                Linus