From: Vlastimil Babka <vbabka@suse.cz>
To: Michal Hocko <mhocko@kernel.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org
Subject: Re: [PATCH] mm: make sure isolate_lru_page() is never called for tail page
Date: Tue, 22 Dec 2015 16:57:51 +0100 [thread overview]
Message-ID: <567972FF.4090408@suse.cz> (raw)
In-Reply-To: <20151216144749.GB23092@dhcp22.suse.cz>
On 12/16/2015 03:47 PM, Michal Hocko wrote:
> On Wed 16-12-15 16:29:30, Kirill A. Shutemov wrote:
>> The VM_BUG_ON_PAGE() would catch such cases if any still exists.
>
> Thanks, this better than a silent breakage.
>
>> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
>
> Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
>
>> ---
>> mm/vmscan.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/mm/vmscan.c b/mm/vmscan.c
>> index 964390906167..05dd182f04fd 100644
>> --- a/mm/vmscan.c
>> +++ b/mm/vmscan.c
>> @@ -1436,6 +1436,7 @@ int isolate_lru_page(struct page *page)
>> int ret = -EBUSY;
>>
>> VM_BUG_ON_PAGE(!page_count(page), page);
>> + VM_BUG_ON_PAGE(PageTail(page), page);
>>
>> if (PageLRU(page)) {
>> struct zone *zone = page_zone(page);
>> --
>> 2.6.2
>
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prev parent reply other threads:[~2015-12-22 15:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-16 14:29 Kirill A. Shutemov
2015-12-16 14:47 ` Michal Hocko
2015-12-22 15:57 ` Vlastimil Babka [this message]
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