linux-kernel - Re: [RFC PATCH 1/5] mm: memory: extend finish

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Date: Tue, 23 Apr 2024 16:39:51 +0800
From: Lance Yang <ioworker0@...il.com>
To: baolin.wang@...ux.alibaba.com
Cc: 21cnbao@...il.com,
	akpm@...ux-foundation.org,
	david@...hat.com,
	hughd@...gle.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	ryan.roberts@....com,
	shy828301@...il.com,
	wangkefeng.wang@...wei.com,
	willy@...radead.org,
	ying.huang@...el.com,
	ziy@...dia.com
Subject: Re: [RFC PATCH 1/5] mm: memory: extend finish_fault() to support large folio

Hey Baolin,

[...]
@@ -4727,9 +4725,11 @@ vm_fault_t finish_fault(struct vm_fault *vmf)
[...]

The mm counters have been moved from updating out of set_pte_range(), so we
we may need to rebase against Kefeng's patch[1].

+	int type = is_cow ? MM_ANONPAGES : mm_counter_file(folio);
	set_pte_range(vmf, folio, &folio->page, nr_pages, addr);
+	add_mm_counter(vma->vm_mm, type, nr_pages);
[...]

[1] https://lore.kernel.org/all/20240412064751.119015-1-wangkefeng.wang@huawei.com/T/#me2827c26ff453c0fa86f2af9f68f245978b08774

Thanks,
Lance