From: Vlastimil Babka <vbabka@suse.cz>
To: Matthew Wilcox <willy@infradead.org>, linux-mm@kvack.org
Cc: Matthew Wilcox <mawilcox@microsoft.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>
Subject: Re: [PATCH v3 06/14] mm: Move _refcount out of struct page union
Date: Thu, 19 Apr 2018 13:37:00 +0200 [thread overview]
Message-ID: <1e1f20b2-f9a9-c9f3-96d7-b2846fb05f52@suse.cz> (raw)
In-Reply-To: <20180418184912.2851-7-willy@infradead.org>
On 04/18/2018 08:49 PM, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@microsoft.com>
>
> Keeping the refcount in the union only encourages people to put
> something else in the union which will overlap with _refcount and
> eventually explode messily. pahole reports no fields change location.
>
> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
next prev parent reply other threads:[~2018-04-19 11:37 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-18 18:48 [PATCH v3 00/14] Rearrange struct page Matthew Wilcox
2018-04-18 18:48 ` [PATCH v3 01/14] s390: Use _refcount for pgtables Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 02/14] mm: Split page_type out from _mapcount Matthew Wilcox
2018-04-19 9:04 ` Vlastimil Babka
2018-04-19 11:16 ` Matthew Wilcox
2018-04-20 15:17 ` Christopher Lameter
2018-04-20 20:43 ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 03/14] mm: Mark pages in use for page tables Matthew Wilcox
2018-04-19 9:30 ` Vlastimil Babka
2018-04-18 18:49 ` [PATCH v3 04/14] mm: Switch s_mem and slab_cache in struct page Matthew Wilcox
2018-04-19 11:06 ` Vlastimil Babka
2018-04-19 11:19 ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 05/14] mm: Move 'private' union within " Matthew Wilcox
2018-04-19 11:31 ` Vlastimil Babka
2018-04-20 15:25 ` Christopher Lameter
2018-04-20 20:27 ` Matthew Wilcox
2018-04-30 9:38 ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 06/14] mm: Move _refcount out of struct page union Matthew Wilcox
2018-04-19 11:37 ` Vlastimil Babka [this message]
2018-04-30 9:40 ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 07/14] slub: Remove page->counters Matthew Wilcox
2018-04-19 13:42 ` Vlastimil Babka
2018-04-19 14:23 ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 08/14] mm: Combine first three unions in struct page Matthew Wilcox
2018-04-19 13:46 ` Vlastimil Babka
2018-04-19 14:08 ` Matthew Wilcox
2018-04-30 9:42 ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 09/14] mm: Use page->deferred_list Matthew Wilcox
2018-04-19 13:23 ` Vlastimil Babka
2018-04-30 9:43 ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 10/14] mm: Move lru union within struct page Matthew Wilcox
2018-04-19 13:56 ` Vlastimil Babka
2018-04-30 9:44 ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 11/14] mm: Combine first two unions in " Matthew Wilcox
2018-04-19 14:03 ` Vlastimil Babka
2018-04-30 9:47 ` Kirill A. Shutemov
2018-04-30 12:42 ` Matthew Wilcox
2018-04-30 13:12 ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 12/14] mm: Improve struct page documentation Matthew Wilcox
2018-04-18 23:32 ` Randy Dunlap
2018-04-18 23:43 ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 13/14] slab,slub: Remove rcu_head size checks Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 14/14] slub: Remove kmem_cache->reserved Matthew Wilcox
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