Re: [PATCH] mm: fix up a spurious page fault whenever it happens
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: 2013-06-19 05:20:40
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On Tue, Jun 18, 2013 at 9:13 AM, Stanislav Meduna [off-list ref] 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