linux-kernel - Re: [PATCH 1/2] mm: khugepaged: convert set_huge

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <70785e68-5152-459f-b241-fa5abc3b88ae@redhat.com>
Date: Wed, 7 May 2025 23:19:23 +0200
From: David Hildenbrand <david@...hat.com>
To: Matthew Wilcox <willy@...radead.org>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc: akpm@...ux-foundation.org, hannes@...xchg.org,
 lorenzo.stoakes@...cle.com, Liam.Howlett@...cle.com, npache@...hat.com,
 ryan.roberts@....com, dev.jain@....com, ziy@...dia.com, vbabka@...e.cz,
 rppt@...nel.org, surenb@...gle.com, mhocko@...e.com, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mm: khugepaged: convert set_huge_pmd() to take a
 folio

On 07.05.25 14:04, Matthew Wilcox wrote:
> On Wed, May 07, 2025 at 05:26:12PM +0800, Baolin Wang wrote:
>> @@ -1476,13 +1476,13 @@ static int set_huge_pmd(struct vm_area_struct *vma, unsigned long addr,
>>   		.pmd = pmdp,
>>   	};
>>   
>> -	VM_BUG_ON(!PageTransHuge(hpage));
>> +	VM_BUG_ON(!folio_test_large(folio));
> 
> I don't think this is aterribly useful assertion to keep in a static
> function with one caller, do you?
> 

I'll not that -- whatever we do here -- we can (finally) get rid of 
PageTransHuge.

-- 
Cheers,

David / dhildenb