linux-kernel - Re: [PATCH v2 6/6] dax: add tracepoints to dax_pmd_insert

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Date:   Thu, 1 Dec 2016 11:11:06 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Ingo Molnar <mingo@...hat.com>, Jan Kara <jack@...e.cz>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-nvdimm@...ts.01.org
Subject: Re: [PATCH v2 6/6] dax: add tracepoints to dax_pmd_insert_mapping()

On Thu, 1 Dec 2016 08:44:32 -0700
Ross Zwisler <ross.zwisler@...ux.intel.com> wrote:


> Actually I think it may be ideal to stick it as the 2nd entry after 'dev'.
> dev_t is:
> 
> typedef __u32 __kernel_dev_t;
> typedef __kernel_dev_t		dev_t;
> 
> So those two 32 bit values should combine into a single 64 bit space.

Yeah that should work too.

-- Steve

> 
> Thanks for the help, I obviously wasn't considering packing when ordering the
> elements.