linux-kernel - Re: [PATCH v3 4/5] dax: add tracepoints to dax_pmd_load

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Date:   Thu, 1 Dec 2016 11:56:08 -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 v3 4/5] dax: add tracepoints to dax_pmd_load_hole()

On Thu,  1 Dec 2016 09:37:50 -0700
Ross Zwisler <ross.zwisler@...ux.intel.com> wrote:

> Add tracepoints to dax_pmd_load_hole(), following the same logging
> conventions as the tracepoints in dax_iomap_pmd_fault().
> 
> Here is an example PMD fault showing the new tracepoints:
> 
> read_big-1478  [004] ....   238.242188: xfs_filemap_pmd_fault: dev 259:0
> ino 0x1003
> 
> read_big-1478  [004] ....   238.242191: dax_pmd_fault: dev 259:0 ino 0x1003
> shared ALLOW_RETRY|KILLABLE|USER address 0x10400000 vm_start 0x10200000
> vm_end 0x10600000 pgoff 0x200 max_pgoff 0x1400
> 
> read_big-1478  [004] ....   238.242390: dax_pmd_load_hole: dev 259:0 ino
> 0x1003 shared address 0x10400000 zero_page ffffea0002c20000 radix_entry
> 0x1e
> 
> read_big-1478  [004] ....   238.242392: dax_pmd_fault_done: dev 259:0 ino
> 0x1003 shared ALLOW_RETRY|KILLABLE|USER address 0x10400000 vm_start
> 0x10200000 vm_end 0x10600000 pgoff 0x200 max_pgoff 0x1400 NOPAGE
> 
> Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Reviewed-by: Jan Kara <jack@...e.cz>
> ---

Acked-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve