[RFC 3/3] sched: depend on 64BIT_ATOMIC_ACCESS to determine if to use min_vruntime_copy
From: peterz@infradead.org (Peter Zijlstra)
Date: 2017-08-24 08:49:44
Also in:
linux-arch, lkml
On Thu, Aug 24, 2017 at 02:42:57PM +0900, Hoeun Ryu wrote:
+#ifndef CONFIG_64BIT_ATOMIC_ALIGNED_ACCESS u64 min_vruntime; -#ifndef CONFIG_64BIT +#else + u64 min_vruntime __attribute__((aligned(sizeof(u64)))); +#endif
That's stupid, just make sure your platform defines u64 as naturally aligned when you have this 64BIT_ATOMIC foo. Also, please try and dig out more 32bit archs that can use this and make sure to include performance numbers to justify this extra cruft.