From: Dave Hansen <[email protected]>
I have a little microbenchmark that sits and does write() in a loop.
The number one kernel function in the profiles is __srcu_read_lock()
from fsnotify(). I decided to turn off INOTIFY in order to see what
the potential from optimizing this path would be. I ended up with
a system at the rescue console as systemd complained that dependencies
were not met mounting some non-root filesystems:
systemd: inotify_init1() failed: Function not implemented
systemd: Dependency failed for Mark the need to relabel after reboot.
systemd: Triggering OnFailure= dependencies of local-fs.target.
systemd: inotify_init1() failed: Function not implemented
systemd: Dependency failed for /gcc.
It looks like CONFIG_INOTIFY is now a critical part of any system
that wants to both use systemd and boot. Let's make it depend
on CONFIG_EMBEDDED.
Signed-off-by: Dave Hansen <[email protected]>
Cc: John McCutchan <[email protected]>
Cc: Robert Love <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: [email protected]
---
b/fs/notify/inotify/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/notify/inotify/Kconfig~make-inotify-harder-to-turn-off
fs/notify/inotify/Kconfig
--- a/fs/notify/inotify/Kconfig~make-inotify-harder-to-turn-off 2015-06-19
10:54:06.528721072 -0700
+++ b/fs/notify/inotify/Kconfig 2015-06-19 10:55:16.426892530 -0700
@@ -1,5 +1,5 @@
config INOTIFY_USER
- bool "Inotify support for userspace"
+ bool "Inotify support for userspace" if EMBEDDED
select ANON_INODES
select FSNOTIFY
default y
_
--
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