diff for duplicates of <BY2PR21MB003653755FD85FCE2C49393ECBD20@BY2PR21MB0036.namprd21.prod.outlook.com>

diff --git a/a/1.txt b/N1/1.txt
index 827861b..88eaf62 100644
--- a/a/1.txt
+++ b/N1/1.txt
@@ -1,27 +1,34 @@
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\ No newline at end of file
+From: Jeff Layton [mailto:jlayton@poochiereds.net]
+> On Thu, 2017-06-29 at 10:11 -0700, Darrick J. Wong wrote:
+> > On Thu, Jun 29, 2017 at 09:19:48AM -0400, jlayton@kernel.org wrote:
+> > > +Handling errors during writeback
+> > > +--------------------------------
+> > > +Most applications that utilize the pagecache will periodically call
+> > > +fsync to ensure that data written has made it to the backing store.
+> >
+> > /me wonders if this sentence ought to be worded more strongly, e.g.
+> >
+> > "Applications that utilize the pagecache must call a data
+> > synchronization syscall such as fsync, fdatasync, or msync to ensure
+> > that data written has made it to the backing store."
+> 
+> Well...only if they care about the data. There are some that don't. :)
+
+Also, applications don't "utilize the pagecache"; filesystems use the pagecache.
+Applications may or may not use cached I/O.  How about this:
+
+Applications which care about data integrity and use cached I/O will
+periodically call fsync(), msync() or fdatasync() to ensure that their
+data is durable.
+
+> What should we do about sync_file_range here? It doesn't currently call
+> any filesystem operations directly, so we don't have a good way to make
+> it selectively use errseq_t handling there.
+> 
+> I could resurrect the FS_* flag for that, though I don't really like
+> that. Should I just go ahead and convert it over to use errseq_t under
+> the theory that most callers will eventually want that anyway?
+
+I think so.
+
+ÿôèº{.nÇ+‰·Ÿ®‰†+%ŠËÿ±éÝ¶\x17¥Šwÿº{.nÇ+‰·¥Š{±ý»k~ÏâžØ^n‡r¡ö¦zË\x1aëh™¨èÚ&£ûàz¿äz¹Þ—ú+€Ê+zf£¢·hšˆ§~††Ûiÿÿïêÿ‘êçz_è®\x0fæj:+v‰¨þ)ß£øm
\ No newline at end of file
diff --git a/a/content_digest b/N1/content_digest
index a0c709c..4a5de30 100644
--- a/a/content_digest
+++ b/N1/content_digest
@@ -54,33 +54,40 @@
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+  "From: Jeff Layton [mailto:jlayton\@poochiereds.net]\n",
+  "> On Thu, 2017-06-29 at 10:11 -0700, Darrick J. Wong wrote:\n",
+  "> > On Thu, Jun 29, 2017 at 09:19:48AM -0400, jlayton\@kernel.org wrote:\n",
+  "> > > +Handling errors during writeback\n",
+  "> > > +--------------------------------\n",
+  "> > > +Most applications that utilize the pagecache will periodically call\n",
+  "> > > +fsync to ensure that data written has made it to the backing store.\n",
+  "> >\n",
+  "> > /me wonders if this sentence ought to be worded more strongly, e.g.\n",
+  "> >\n",
+  "> > \"Applications that utilize the pagecache must call a data\n",
+  "> > synchronization syscall such as fsync, fdatasync, or msync to ensure\n",
+  "> > that data written has made it to the backing store.\"\n",
+  "> \n",
+  "> Well...only if they care about the data. There are some that don't. :)\n",
+  "\n",
+  "Also, applications don't \"utilize the pagecache\"; filesystems use the pagecache.\n",
+  "Applications may or may not use cached I/O.  How about this:\n",
+  "\n",
+  "Applications which care about data integrity and use cached I/O will\n",
+  "periodically call fsync(), msync() or fdatasync() to ensure that their\n",
+  "data is durable.\n",
+  "\n",
+  "> What should we do about sync_file_range here? It doesn't currently call\n",
+  "> any filesystem operations directly, so we don't have a good way to make\n",
+  "> it selectively use errseq_t handling there.\n",
+  "> \n",
+  "> I could resurrect the FS_* flag for that, though I don't really like\n",
+  "> that. Should I just go ahead and convert it over to use errseq_t under\n",
+  "> the theory that most callers will eventually want that anyway?\n",
+  "\n",
+  "I think so.\n",
+  "\n",
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