linux-kernel - Re: [PATCH] dax, pmem: add support for msync

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Message-ID: <55E7217B.2090803@linux.intel.com>
Date:	Wed, 2 Sep 2015 09:19:07 -0700
From:	Dave Hansen <dave.hansen@...ux.intel.com>
To:	Boaz Harrosh <boaz@...xistor.com>,
	Dave Chinner <david@...morbit.com>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...l.org>,
	"H. Peter Anvin" <hpa@...or.com>, Hugh Dickins <hughd@...gle.com>,
	Ingo Molnar <mingo@...hat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	linux-nvdimm@...ts.01.org, Matthew Wilcox <willy@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org
Subject: Re: [PATCH] dax, pmem: add support for msync

On 09/02/2015 09:00 AM, Boaz Harrosh wrote:
>> > We are going to have 2-socket systems with 6TB of persistent memory in
>> > them.  I think it's important to design this mechanism so that it scales
>> > to memory sizes like that and supports large mmap()s.
>> > 
>> > I'm not sure the application you've seen thus far are very
>> > representative of what we want to design for.
>> > 
> We have a patch pending to introduce a new mmap flag that pmem aware
> applications can set to eliminate any kind of flushing. MMAP_PMEM_AWARE.

Great!  Do you have a link so that I can review it and compare it to
Ross's approach?

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