On Fri, Dec 18, 2015 at 10:50 AM, Mandeep Sandhu
<mandeepsandhu....@gmail.com> wrote:
> You've removed the strictatime option altogether. So how does that
> satisfy people who _do_ want it?
...actually it looks like I was an idiot and got my diff backwards when
I pulled it out of git :P
Here's the correct version.
diff --git a/fs/Kconfig b/fs/Kconfig
index 6ce72d8..4b917eb 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -4,6 +4,17 @@
menu "File systems"
+config DEFAULT_STRICTATIME
+ bool "Use strictatime by default"
+ default n
+ help
+ Use strictatime as a default mount option.
+
+ Strictatime preserves ancient historic behavior of keeping the
atime field always up to date.
+ However, it was changed in 2007 to relatime to reduce I/O load on
block devices.
+
+ If unsure, say N.
+
# Use unaligned word dcache accesses
config DCACHE_WORD_ACCESS
bool
diff --git a/fs/namespace.c b/fs/namespace.c
index 0570729..48e7c15 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2680,9 +2680,15 @@ long do_mount(const char *dev_name, const char
__user *dir_name,
if (retval)
goto dput_out;
- /* Default to relatime unless overriden */
+#ifdef CONFIG_DEFAULT_STRICTATIME
+ /* Default to strictatime unless overridden */
+ if (flags & MS_RELATIME)
+ mnt_flags |= MNT_RELATIME;
+#else
+ /* Default to relatime unless overridden */
if (!(flags & MS_NOATIME))
mnt_flags |= MNT_RELATIME;
+#endif
/* Separate the per-mountpoint flags */
if (flags & MS_NOSUID)
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