linux-kernel - Re: [PATCH 1/2] mm/zsmalloc: don't hold locks of all pages when free

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Date: Wed, 28 Feb 2024 14:49:10 +0800
From: Chengming Zhou <chengming.zhou@...ux.dev>
To: Sergey Senozhatsky <senozhatsky@...omium.org>
Cc: yosryahmed@...gle.com, hannes@...xchg.org, nphamcs@...il.com,
 Andrew Morton <akpm@...ux-foundation.org>, Minchan Kim <minchan@...nel.org>,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 1/2] mm/zsmalloc: don't hold locks of all pages when
 free_zspage()

On 2024/2/28 14:14, Sergey Senozhatsky wrote:
> On (24/02/27 03:02), Chengming Zhou wrote:
>> @@ -834,13 +841,12 @@ static void __free_zspage(struct zs_pool *pool, struct size_class *class,
>>  		VM_BUG_ON_PAGE(!PageLocked(page), page);
>>  		next = get_next_page(page);
>>  		reset_page(page);
> 
> reset_page()->__ClearPageMovable()->PageMovable() expects page to be
> locked.

This seems to make the patch doesn't work anymore... will think about it.

Thanks!

> 
>> -		unlock_page(page);
>>  		dec_zone_page_state(page, NR_ZSPAGES);
>>  		put_page(page);
>>  		page = next;
>>  	} while (page != NULL);