linux-kernel - Re: [PATCH v4 1/9] mm/ksm: add ksm_get

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Date: Thu, 11 Apr 2024 14:08:03 +0800
From: Alex Shi <seakeel@...il.com>
To: David Hildenbrand <david@...hat.com>, alexs@...nel.org,
 Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Cc: Izik Eidus <izik.eidus@...ellosystems.com>,
 Matthew Wilcox <willy@...radead.org>, Andrea Arcangeli
 <aarcange@...hat.com>, Hugh Dickins <hughd@...gle.com>,
 Chris Wright <chrisw@...s-sol.org>
Subject: Re: [PATCH v4 1/9] mm/ksm: add ksm_get_folio



On 4/10/24 4:34 PM, David Hildenbrand wrote:
> On 09.04.24 11:28, alexs@...nel.org wrote:
>> From: "Alex Shi (tencent)" <alexs@...nel.org>
>>
>> The ksm only contains single pages, so we could add a new func
>> ksm_get_folio for get_ksm_page to use folio instead of pages to save a
>> couple of compound_head calls.
>>
>> After all caller replaced, get_ksm_page will be removed.
>>
>> Signed-off-by: Alex Shi (tencent) <alexs@...nel.org>
>> To: Andrew Morton <akpm@...ux-foundation.org>
>> Cc: Izik Eidus <izik.eidus@...ellosystems.com>
>> Cc: Matthew Wilcox <willy@...radead.org>
>> Cc: Andrea Arcangeli <aarcange@...hat.com>
>> Cc: Hugh Dickins <hughd@...gle.com>
>> Cc: Chris Wright <chrisw@...s-sol.org>
>> Reviewed-by: David Hildenbrand <david@...hat.com>
>> ---
>>   mm/ksm.c | 40 ++++++++++++++++++++++++----------------
>>   1 file changed, 24 insertions(+), 16 deletions(-)
>>
>> diff --git a/mm/ksm.c b/mm/ksm.c
>> index 8c001819cf10..ac080235b002 100644
>> --- a/mm/ksm.c
>> +++ b/mm/ksm.c
>> @@ -915,10 +915,10 @@ enum get_ksm_page_flags {
>>    * a page to put something that might look like our key in page->mapping.
>>    * is on its way to being freed; but it is an anomaly to bear in mind.
>>    */
>> -static struct page *get_ksm_page(struct ksm_stable_node *stable_node,
>> +static struct folio *ksm_get_folio(struct ksm_stable_node *stable_node,
> 
> Just realized that you should adjust the function name in the comment above this function in this patch.
> 

Right, will resend with your suggestion.