From: Zi Yan <ziy@nvidia.com>
To: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Matthew Wilcox <willy@infradead.org>,
linux-mm@kvack.org, Shuah Khan <shuah@kernel.org>,
Yang Shi <shy828301@gmail.com>, Miaohe Lin <linmiaohe@huawei.com>,
Hugh Dickins <hughd@google.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: Re: [RFC PATCH 1/5] mm: memcg: make memcg huge page split support any order split.
Date: Mon, 21 Mar 2022 15:07:46 -0400 [thread overview]
Message-ID: <0001CABA-9436-4EFF-9C7F-F67300D09DA1@nvidia.com> (raw)
In-Reply-To: <YjjKh2NoWGcq28Oo@carbon.dhcp.thefacebook.com>
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On 21 Mar 2022, at 14:57, Roman Gushchin wrote:
> On Mon, Mar 21, 2022 at 10:21:24AM -0400, Zi Yan wrote:
>> From: Zi Yan <ziy@nvidia.com>
>>
>> It sets memcg information for the pages after the split. A new parameter
>> new_order is added to tell the new page order, always 0 for now. It
>> prepares for upcoming changes to support split huge page to any lower
>> order.
>>
>> Signed-off-by: Zi Yan <ziy@nvidia.com>
>> ---
>> include/linux/memcontrol.h | 2 +-
>> mm/huge_memory.c | 2 +-
>> mm/memcontrol.c | 10 +++++-----
>> mm/page_alloc.c | 2 +-
>> 4 files changed, 8 insertions(+), 8 deletions(-)
>>
>> diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
>> index 89b14729d59f..e71189454bf0 100644
>> --- a/include/linux/memcontrol.h
>> +++ b/include/linux/memcontrol.h
>> @@ -1116,7 +1116,7 @@ static inline void memcg_memory_event_mm(struct mm_struct *mm,
>> rcu_read_unlock();
>> }
>>
>> -void split_page_memcg(struct page *head, unsigned int nr);
>> +void split_page_memcg(struct page *head, unsigned int nr, unsigned int new_order);
>
> It looks a bit inconsistent, can't we switch to use either nr or order for both
> arguments? The latter is preferable.
Yes. Will change it to new_nr to be consistent.
>
> Other than that, the patch looks good to me.
Thank you for the review.
--
Best Regards,
Yan, Zi
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next prev parent reply other threads:[~2022-03-21 19:07 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-21 14:21 [RFC PATCH 0/5] Split a huge page to any lower order pages Zi Yan
2022-03-21 14:21 ` [RFC PATCH 1/5] mm: memcg: make memcg huge page split support any order split Zi Yan
2022-03-21 18:57 ` Roman Gushchin
2022-03-21 19:07 ` Zi Yan [this message]
2022-03-21 19:54 ` Matthew Wilcox
2022-03-21 20:26 ` Zi Yan
2022-03-21 14:21 ` [RFC PATCH 2/5] mm: page_owner: add support for splitting to any order in split page_owner Zi Yan
2022-03-21 19:02 ` Roman Gushchin
2022-03-21 19:08 ` Zi Yan
2022-03-21 14:21 ` [RFC PATCH 3/5] mm: thp: split huge page to any lower order pages Zi Yan
2022-03-21 22:18 ` Roman Gushchin
2022-03-22 14:21 ` Zi Yan
2022-03-22 3:21 ` Miaohe Lin
2022-03-22 14:30 ` Zi Yan
2022-03-23 2:31 ` Miaohe Lin
2022-03-23 22:10 ` Zi Yan
2022-03-24 2:02 ` Miaohe Lin
2022-03-22 20:57 ` Yang Shi
2022-03-21 14:21 ` [RFC PATCH 4/5] mm: truncate: split huge page cache page to a non-zero order if possible Zi Yan
2022-03-21 22:32 ` Roman Gushchin
2022-03-22 14:19 ` Zi Yan
2022-03-23 6:40 ` [mm] 2757cee2d6: UBSAN:shift-out-of-bounds_in_include/linux/log2.h kernel test robot
2022-03-21 14:21 ` [RFC PATCH 5/5] mm: huge_memory: enable debugfs to split huge pages to any order Zi Yan
2022-03-21 22:23 ` Roman Gushchin
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