Messages in this thread | | | Date | Fri, 21 Nov 2014 12:08:05 -0500 | From | Steven Rostedt <> | Subject | Re: frequent lockups in 3.18rc4 |
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On Fri, Nov 21, 2014 at 08:48:58AM -0800, Linus Torvalds wrote: > > (The 64-bit mode also has a "WARN_ON_ONCE(in_nmi())", which I guess is > good - but it's good because the 64-bit version is written the way it > is).
Actually, in_nmi() is now safe for vmalloc faults. In fact, it handles the clobbering of the cr2 register just fine. I wrote tests to test this, and submitted patches to get rid of that warn on. But that never went through.
https://lkml.org/lkml/2013/10/15/894
-- Steve
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