Commit 2fd77fff4b44 ("PM / suspend: make sync() on suspend-to-RAM build-time
optional") added an option to skip sync() on suspend entry to avoid heavy
overhead on platforms with frequent suspends.
Years later, commit 261e224d6a5c ("pm/sleep: Add PM_USERSPACE_AUTOSLEEP
Kconfig") added a dedicated config for indicating that the kernel is subject to
frequent suspends.
While SUSPEND_SKIP_SYNC is also available as a knob that the userspace can
configure, it makes sense to enable this by default if PM_USERSPACE_AUTOSLEEP
is selected already.
Signed-off-by: Juhyung Park <qkrwngud...@gmail.com>
---
kernel/power/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 60a1d3051cc7..5725df6c573b 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -23,6 +23,7 @@ config SUSPEND_SKIP_SYNC
bool "Skip kernel's sys_sync() on suspend to RAM/standby"
depends on SUSPEND
depends on EXPERT
+ default PM_USERSPACE_AUTOSLEEP
help
Skip the kernel sys_sync() before freezing user processes.
Some systems prefer not to pay this cost on every invocation
--
2.37.2
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