linux-kernel - Re: [kernel-hardening] rowhammer protection [was Re: Getting interrupt every million cache misses]

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Message-ID: <571c5ef8-ccce-0b7a-b506-c69a024276a0@gruss.cc>
Date:   Sat, 29 Oct 2016 23:07:59 +0200
From:   Daniel Gruss <daniel@...ss.cc>
To:     Pavel Machek <pavel@....cz>
Cc:     "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        Mark Rutland <mark.rutland@....com>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        kernel list <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: [kernel-hardening] rowhammer protection [was Re: Getting
 interrupt every million cache misses]

On 29.10.2016 23:05, Pavel Machek wrote:
> So far I did bzip2 and kernel compilation. I believe I can prevent
> flips in rowhammer-test with bzip2 going from 4 seconds to 5
> seconds... let me see.

can you prevent bitflips in this one? 
https://github.com/IAIK/rowhammerjs/tree/master/native

> Ok, let me try that. Problem is that the machine I'm testing on takes
> 20 minutes to produce bit flip...

will be lots faster with my code above ;)