From: Matthew Wilcox <willy@infradead.org>
To: Barry Song <21cnbao@gmail.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
ying.huang@intel.com, baolin.wang@linux.alibaba.com,
chrisl@kernel.org, david@redhat.com, hannes@cmpxchg.org,
hughd@google.com, kaleshsingh@google.com, kasong@tencent.com,
linux-kernel@vger.kernel.org, mhocko@suse.com,
minchan@kernel.org, nphamcs@gmail.com, ryan.roberts@arm.com,
senozhatsky@chromium.org, shakeel.butt@linux.dev,
shy828301@gmail.com, surenb@google.com, v-songbaohua@oppo.com,
xiang@kernel.org, yosryahmed@google.com,
Chuanhua Han <hanchuanhua@oppo.com>
Subject: Re: [PATCH v5 3/4] mm: support large folios swapin as a whole for zRAM-like swapfile
Date: Mon, 29 Jul 2024 04:51:07 +0100 [thread overview]
Message-ID: <ZqcRqxGaJsAwZD3C@casper.infradead.org> (raw)
In-Reply-To: <20240726094618.401593-4-21cnbao@gmail.com>
On Fri, Jul 26, 2024 at 09:46:17PM +1200, Barry Song wrote:
> - folio = vma_alloc_folio(GFP_HIGHUSER_MOVABLE, 0,
> - vma, vmf->address, false);
> + folio = alloc_swap_folio(vmf);
> page = &folio->page;
This is no longer correct. You need to set 'page' to the precise page
that is being faulted rather than the first page of the folio. It was
fine before because it always allocated a single-page folio, but now it
must use folio_page() or folio_file_page() (whichever has the correct
semantics for you).
Also you need to fix your test suite to notice this bug. I suggest
doing that first so that you know whether you've got the calculation
correct.
next prev parent reply other threads:[~2024-07-29 3:51 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-26 9:46 [PATCH v5 0/4] mm: support mTHP swap-in for zRAM-like swapfile Barry Song
2024-07-26 9:46 ` [PATCH v5 1/4] mm: swap: introduce swapcache_prepare_nr and swapcache_clear_nr for large folios swap-in Barry Song
2024-07-30 3:00 ` Baolin Wang
2024-07-30 3:11 ` Matthew Wilcox
2024-07-30 3:15 ` Barry Song
2024-07-26 9:46 ` [PATCH v5 2/4] mm: Introduce mem_cgroup_swapin_uncharge_swap_nr() helper " Barry Song
2024-07-26 16:30 ` Yosry Ahmed
2024-07-29 2:02 ` Barry Song
2024-07-29 3:43 ` Matthew Wilcox
2024-07-29 4:52 ` Barry Song
2024-07-26 9:46 ` [PATCH v5 3/4] mm: support large folios swapin as a whole for zRAM-like swapfile Barry Song
2024-07-29 3:51 ` Matthew Wilcox [this message]
2024-07-29 4:41 ` Barry Song
[not found] ` <CAGsJ_4wxUZAysyg3cCVnHhOFt5SbyAMUfq3tJcX-Wb6D4BiBhA@mail.gmail.com>
2024-07-29 12:49 ` Matthew Wilcox
2024-07-29 13:11 ` Barry Song
2024-07-29 15:13 ` Matthew Wilcox
2024-07-29 20:03 ` Barry Song
2024-07-29 21:56 ` Barry Song
2024-07-30 8:12 ` Ryan Roberts
2024-07-29 6:36 ` Chuanhua Han
2024-07-29 12:55 ` Matthew Wilcox
2024-07-29 13:18 ` Barry Song
2024-07-29 13:32 ` Chuanhua Han
2024-07-29 14:16 ` Dan Carpenter
2024-07-26 9:46 ` [PATCH v5 4/4] mm: Introduce per-thpsize swapin control policy Barry Song
2024-07-27 5:58 ` kernel test robot
2024-07-29 1:37 ` Barry Song
2024-07-29 3:52 ` Matthew Wilcox
2024-07-29 4:49 ` Barry Song
2024-07-29 16:11 ` Christoph Hellwig
2024-07-29 20:11 ` Barry Song
2024-07-30 16:30 ` Christoph Hellwig
2024-07-30 19:28 ` Nhat Pham
2024-07-30 21:06 ` Barry Song
2024-07-31 18:35 ` Nhat Pham
2024-08-01 3:00 ` Sergey Senozhatsky
2024-08-01 20:55 ` Chris Li
2024-08-12 8:27 ` Christoph Hellwig
2024-08-12 8:44 ` Barry Song
2024-07-30 2:27 ` Chuanhua Han
2024-07-30 8:36 ` Ryan Roberts
2024-07-30 8:47 ` David Hildenbrand
2024-08-05 6:10 ` Huang, Ying
2024-08-02 12:20 ` [PATCH v6 0/2] mm: Ignite large folios swap-in support Barry Song
2024-08-02 12:20 ` [PATCH v6 1/2] mm: add nr argument in mem_cgroup_swapin_uncharge_swap() helper to support large folios Barry Song
2024-08-02 17:29 ` Chris Li
2024-08-02 12:20 ` [PATCH v6 2/2] mm: support large folios swap-in for zRAM-like devices Barry Song
2024-08-03 19:08 ` Andrew Morton
2024-08-12 8:26 ` Christoph Hellwig
2024-08-12 8:53 ` Barry Song
2024-08-12 11:38 ` Christoph Hellwig
2024-08-15 9:47 ` Kairui Song
2024-08-15 13:27 ` Kefeng Wang
2024-08-15 23:06 ` Barry Song
2024-08-16 16:50 ` Kairui Song
2024-08-16 20:34 ` Andrew Morton
2024-08-27 3:41 ` Chuanhua Han
2024-08-16 21:16 ` Matthew Wilcox
2024-08-16 21:39 ` Barry Song
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