Date: Thu, 7 May 2015 13:40:21 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        David Hildenbrand <dahi@linux.vnet.ibm.com>,
        linux-kernel@vger.kernel.org, mingo@redhat.com, yang.shi@windriver.com,
        bigeasy@linutronix.de, benh@kernel.crashing.org, paulus@samba.org,
        heiko.carstens@de.ibm.com, schwidefsky@de.ibm.com, mst@redhat.com,
        tglx@linutronix.de, David.Laight@ACULAB.COM, hughd@google.com,
        hocko@suse.cz, ralf@linux-mips.org, herbert@gondor.apana.org.au,
        linux@arm.linux.org.uk, airlied@linux.ie, daniel.vetter@intel.com,
        linux-mm@kvack.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH RFC 00/15] decouple pagefault_disable() from
 preempt_disable()
Message-ID: <20150507114021.GH23123@twins.programming.kicks-ass.net>
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On Thu, May 07, 2015 at 01:08:28PM +0200, Ingo Molnar wrote:
> Yes, but I'm wondering what I'm missing: is there any deep reason for 
> making pagefaults-disabled sections non-atomic?

This all comes from -rt, where we had significant latencies due to these
things.
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