From: David Hildenbrand <david@redhat.com>
To: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <axboe@kernel.dk>,
io-uring@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 9/9] mm: Free up a word in the first tail page
Date: Tue, 15 Aug 2023 09:59:08 +0200 [thread overview]
Message-ID: <86579ba0-057e-37bd-e2ec-bd705026daa5@redhat.com> (raw)
In-Reply-To: <20230815032645.1393700-10-willy@infradead.org>
On 15.08.23 05:26, Matthew Wilcox (Oracle) wrote:
> Store the folio order in the low byte of the flags word in the first
> tail page. This frees up the word that was being used to store the
> order and dtor bytes previously.
>
Is there still a free flag in page[1] after this change? I need one, at
least for a prototype I'm working on. (could fallback to page[2], though
eventually, though)
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2023-08-15 8:00 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-15 3:26 [PATCH 0/9] Remove _folio_dtor and _folio_order Matthew Wilcox (Oracle)
2023-08-15 3:26 ` [PATCH 1/9] io_uring: Stop calling free_compound_page() Matthew Wilcox (Oracle)
2023-08-15 7:33 ` David Hildenbrand
2023-08-15 15:00 ` Jens Axboe
2023-08-15 15:36 ` Matthew Wilcox
2023-08-15 3:26 ` [PATCH 2/9] mm: Call the hugetlb destructor directly Matthew Wilcox (Oracle)
2023-08-15 7:36 ` David Hildenbrand
2023-08-15 3:26 ` [PATCH 3/9] mm: Call free_transhuge_folio() directly from destroy_large_folio() Matthew Wilcox (Oracle)
2023-08-15 6:13 ` kernel test robot
2023-08-15 7:40 ` David Hildenbrand
2023-08-15 14:06 ` Matthew Wilcox
2023-08-15 8:09 ` kernel test robot
2023-08-15 3:26 ` [PATCH 4/9] mm: Make free_compound_page() static Matthew Wilcox (Oracle)
2023-08-15 7:47 ` David Hildenbrand
2023-08-15 7:48 ` David Hildenbrand
2023-08-15 3:26 ` [PATCH 5/9] mm: Remove free_compound_page() Matthew Wilcox (Oracle)
2023-08-15 7:48 ` David Hildenbrand
2023-08-15 3:26 ` [PATCH 6/9] mm: Remove HUGETLB_PAGE_DTOR Matthew Wilcox (Oracle)
2023-08-15 7:50 ` David Hildenbrand
2023-08-15 3:26 ` [PATCH 7/9] mm: Add deferred_list page flag Matthew Wilcox (Oracle)
2023-08-15 7:54 ` David Hildenbrand
2023-08-15 15:32 ` Matthew Wilcox
2023-08-15 16:40 ` David Hildenbrand
2023-08-15 17:06 ` Matthew Wilcox
2023-08-15 17:27 ` David Hildenbrand
2023-08-15 19:58 ` Matthew Wilcox
2023-08-16 3:14 ` Matthew Wilcox
2023-08-16 10:12 ` David Hildenbrand
2023-08-16 12:05 ` Matthew Wilcox
2023-08-16 12:34 ` David Hildenbrand
2023-08-16 9:55 ` David Hildenbrand
2023-08-15 3:26 ` [PATCH 8/9] mm: Rearrange page flags Matthew Wilcox (Oracle)
2023-08-15 4:30 ` Yosry Ahmed
2023-08-15 19:24 ` Peter Xu
2023-08-15 20:07 ` Matthew Wilcox
2023-08-15 22:31 ` Yosry Ahmed
2023-08-15 23:01 ` Matthew Wilcox
2023-08-15 23:33 ` Yosry Ahmed
2023-08-15 3:26 ` [PATCH 9/9] mm: Free up a word in the first tail page Matthew Wilcox (Oracle)
2023-08-15 7:59 ` David Hildenbrand [this message]
2023-08-15 11:39 ` Matthew Wilcox
2023-08-15 19:21 ` Peter Xu
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