From: Thomas Gleixner <tglx@linutronix.de> Date: Thu, 25 Aug 2022 18:41:29 +0200 Subject: [PATCH 6/8] mm/compaction: Get rid of RT ifdeffery Move the RT dependency for the initial value of sysctl_compact_unevictable_allowed into Kconfig. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Nick Terrell <terrelln@fb.com> Cc: linux-mm@kvack.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220825164131.402717-7-bigeasy@linutronix.de --- mm/Kconfig | 6 ++++++ mm/compaction.c | 6 +----- 2 files changed, 7 insertions(+), 5 deletions(-) --- a/mm/Kconfig +++ b/mm/Kconfig @@ -579,6 +579,12 @@ config COMPACTION it and then we would be really interested to hear about that at linux-mm@kvack.org. +config COMPACT_UNEVICTABLE_DEFAULT + int + depends on COMPACTION + default 0 if PREEMPT_RT + default 1 + # # support for free page reporting config PAGE_REPORTING --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1727,11 +1727,7 @@ typedef enum { * Allow userspace to control policy on scanning the unevictable LRU for * compactable pages. */ -#ifdef CONFIG_PREEMPT_RT -int sysctl_compact_unevictable_allowed __read_mostly = 0; -#else -int sysctl_compact_unevictable_allowed __read_mostly = 1; -#endif +int sysctl_compact_unevictable_allowed __read_mostly = CONFIG_COMPACT_UNEVICTABLE_DEFAULT; static inline void update_fast_start_pfn(struct compact_control *cc, unsigned long pfn)