Messages in this thread | | | From | Xin Hao <> | Subject | [RFC PATCH V4 0/1] mm: add last level page table numa info to /proc/pid/numa_pgtable | Date | Mon, 1 Aug 2022 20:17:26 +0800 |
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In many data center servers, the shared memory architectures is Non-Uniform Memory Access (NUMA), remote numa node data access often brings a high latency problem, but what we are easy to ignore is that the page table remote numa access, It can also leads to a performance degradation.
So there add a new interface in /proc, This will help developers to get more info about performance issues if they are caused by cross-NUMA.
V4 -> V3 1, Add some detects and spinlock when operating PMD page as Baolin Wang advised.
V2 -> V3 1, Fix compile warning bug.
V1 -> V2 1, As Matthew Wilcox advise, Simplify the code. 2, Do some codes format fix.
V3: https://lore.kernel.org/linux-mm/20220801032704.64356-1-xhao@linux.alibaba.com/ V2: https://lore.kernel.org/linux-mm/20220731155223.60238-1-xhao@linux.alibaba.com/ V1: https://lore.kernel.org/linux-mm/YuVqdcY8Ibib2LJa@casper.infradead.org/T/
Xin Hao (1): mm: add last level page table numa info to /proc/pid/numa_pgtable
fs/proc/base.c | 2 ++ fs/proc/internal.h | 1 + fs/proc/task_mmu.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+)
-- 2.31.0
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