[PATCH 0/7] enable PT_RECLAIM on all 64-bit architectures

[David Hildenbrand (Red Hat)]

On 14.11.25 12:11, Qi Zheng wrote:
> From: Qi Zheng <zhengqi.arch at bytedance.com>
> 
> Hi all,
> 
> This series aims to enable PT_RECLAIM on all 64-bit architectures.
> 
> On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of empty PTE
> page table pages (such as 100GB+). To resolve this problem, we need to enable
> PT_RECLAIM, which depends on MMU_GATHER_RCU_TABLE_FREE.
> 

Makes sense!

> Therefore, this series first enables MMU_GATHER_RCU_TABLE_FREE on all 64-bit
> architectures, and finally makes PT_RECLAIM depend on MMU_GATHER_RCU_TABLE_FREE
> && 64BIT. This way, PT_RECLAIM can be enabled by default on all 64-bit
> architectures.

Could we then even go ahead and stop making PT_RECLAIM user-selectable?

-- 
Cheers

David