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From: Oscar Salvador <osalvador@suse.de>
To: Muchun Song <songmuchun@bytedance.com>
Cc: corbet@lwn.net, mike.kravetz@oracle.com, tglx@linutronix.de,
	mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
	dave.hansen@linux.intel.com, luto@kernel.org,
	peterz@infradead.org, viro@zeniv.linux.org.uk,
	akpm@linux-foundation.org, paulmck@kernel.org,
	pawan.kumar.gupta@linux.intel.com, rdunlap@infradead.org,
	oneukum@suse.com, anshuman.khandual@arm.com, jroedel@suse.de,
	almasrymina@google.com, rientjes@google.com, willy@infradead.org,
	mhocko@suse.com, song.bao.hua@hisilicon.com, david@redhat.com,
	naoya.horiguchi@nec.com, joao.m.martins@oracle.com,
	duanxiongchun@bytedance.com, fam.zheng@bytedance.com,
	zhengqi.arch@bytedance.com, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v23 5/9] mm: hugetlb: defer freeing of HugeTLB pages
Date: Mon, 10 May 2021 12:23:12 +0200	[thread overview]
Message-ID: <20210510102312.GC22664@linux> (raw)
In-Reply-To: <20210510030027.56044-6-songmuchun@bytedance.com>

On Mon, May 10, 2021 at 11:00:23AM +0800, Muchun Song wrote:
> In the subsequent patch, we should allocate the vmemmap pages when
> freeing a HugeTLB page. But update_and_free_page() can be called
> under any context, so we cannot use GFP_KERNEL to allocate vmemmap
> pages. However, we can defer the actual freeing in a kworker to
> prevent from using GFP_ATOMIC to allocate the vmemmap pages.
> 
> The __update_and_free_page() is where the call to allocate vmemmmap
> pages will be inserted.
> 
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>

Reviewed-by: Oscar Salvador <osalvador@suse.de>


-- 
Oscar Salvador
SUSE L3

  reply	other threads:[~2021-05-10 10:23 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-10  3:00 [PATCH v23 0/9] Free some vmemmap pages of HugeTLB page Muchun Song
2021-05-10  3:00 ` [PATCH v23 1/9] mm: memory_hotplug: factor out bootmem core functions to bootmem_info.c Muchun Song
2021-05-10  3:00 ` [PATCH v23 2/9] mm: hugetlb: introduce a new config HUGETLB_PAGE_FREE_VMEMMAP Muchun Song
2021-05-10  3:00 ` [PATCH v23 3/9] mm: hugetlb: gather discrete indexes of tail page Muchun Song
2021-05-10  3:00 ` [PATCH v23 4/9] mm: hugetlb: free the vmemmap pages associated with each HugeTLB page Muchun Song
2021-05-10  3:00 ` [PATCH v23 5/9] mm: hugetlb: defer freeing of HugeTLB pages Muchun Song
2021-05-10 10:23   ` Oscar Salvador [this message]
2021-05-10  3:00 ` [PATCH v23 6/9] mm: hugetlb: alloc the vmemmap pages associated with each HugeTLB page Muchun Song
2021-05-10 10:45   ` Oscar Salvador
2021-05-10 12:19     ` [External] " Muchun Song
2021-05-11  1:10       ` Mike Kravetz
2021-05-11  8:07       ` Oscar Salvador
2021-05-10  3:00 ` [PATCH v23 7/9] mm: hugetlb: add a kernel parameter hugetlb_free_vmemmap Muchun Song
2021-05-10  3:00 ` [PATCH v23 8/9] mm: memory_hotplug: disable memmap_on_memory when hugetlb_free_vmemmap enabled Muchun Song
2021-05-10 10:08   ` Oscar Salvador
2021-05-10 10:33     ` [External] " Muchun Song
2021-05-10  3:00 ` [PATCH v23 9/9] mm: hugetlb: introduce nr_free_vmemmap_pages in the struct hstate Muchun Song
2021-06-25 17:21 ` [PATCH v23 0/9] Free some vmemmap pages of HugeTLB page Wali, Rohit

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