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Subject: Re: Use higher-order pages in vmalloc
To: Andy Lutomirski <luto@kernel.org>, Michal Hocko <mhocko@kernel.org>
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Cc: Matthew Wilcox <willy@infradead.org>,
        Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
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From: Dave Hansen <dave.hansen@intel.com>
Message-ID: <ab926942-92a2-de72-68a0-c250e72739f9@intel.com>
Date: Thu, 22 Feb 2018 11:19:10 -0800
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On 02/22/2018 11:01 AM, Andy Lutomirski wrote:
> On x86, if you shoot down the PTE for the current stack, you're dead.

*If* we were to go do this insanity for vmalloc()'d memory, we could
probably limit it to kswapd, and also make sure that kernel threads
don't get vmalloc()'d stacks or that we mark them in a way to say we
never muck with them.