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Sun, 15 Feb 2026 01:25:49 -0800 (PST) MIME-Version: 1.0 References: <20260206121151.dea3633d1f0ded7bbf49c22e@linux-foundation.org> <8b4bdcfa-ce3f-4e23-839f-31367df7c18f@gmx.de> In-Reply-To: <8b4bdcfa-ce3f-4e23-839f-31367df7c18f@gmx.de> From: Kairui Song Date: Sun, 15 Feb 2026 17:25:11 +0800 X-Gm-Features: AaiRm52t5gquqt84X14WY-wF0yKI0XXs6jWRQ7jmM7SjrRn7-M-rG_mwyISNzuM Message-ID: Subject: Re: [Bug 221055] New: Hibernate image write 10x slower since commit 0ff67f990bd4 ("mm, swap: remove swap slot cache") To: Carsten Grohmann Cc: Andrew Morton , bugzilla-daemon@kernel.org, Baoquan He , Nhat Pham , Yosry Ahmed , linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 19683180006 X-Stat-Signature: qhm83cmgja69yrd417m7fqxhqzagsens X-Rspam-User: X-HE-Tag: 1771147550-585078 X-HE-Meta: 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 tQwy9lPJ 8Q0RReTWITQ/FT6KMbPVBodtZha+6TOeDraiss3QP8EsQP0XYQKPycR2Dz2otcI45wAT9tWMj/bcnPFoen7cGNaz5G91nB/LBDNyW+PJq0khB7x/SQ2VBJIrHFgk98PyzeggYZzhw2zUTNNJCx86ToTjLoGiwP5q6phb0l/4ZJDLCjbKgypUGeEIeHfaxF21rRx+UVekhxkYjeVIAKg72pQFtKDGcJMuatpePKN8NSetkgLnAx2gln7TeQh8hp7gd0XIW+cN6WS3fHxN3H7w8w0BTM/IKfJ2M7rTQZYI5Ri0KWnORsn38nGbyPfA6ICnzKbbdxBiYtdQWtJRU+PToEdH8/+p/GMxWjmC/oe71ppGH0DZ0fg54tLNMvaL6zuuQhWanh2XMIBPIbVigXluV13iZVvfOBZqrAyYHZTn5Uw4bYfOSyeOCH9FdOKAHGcniurCH X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sun, Feb 15, 2026 at 4:56=E2=80=AFPM Carsten Grohmann wrote: > > 12.02.2026 21:37:04 Carsten Grohmann : > > > 12.02.2026 20:01:48 Kairui Song : > > > >> And can anyone help verify this fix? I'll also try some other SSD > >> later > >> maybe that's only reproducible with SSD that have very poor 4K > >> performance. > > I'll try out your patch over the weekend. > > I tested your patch with the current HEAD from git.kernel.org. The first > run is with your patch, the second without: > > Date: 2026-02-15 08:29:33 > Commit: 770aaedb461a (Merge tag 'bootconfig-v7.0' of > git://git.kernel.or) > Kernel: 6.19.0-20260214-153617-09922-g770aaedb461a-dirty > Duration: 35 Sekunden > Result: good > ---------------------------------------- > Date: 2026-02-15 09:01:25 > Commit: 770aaedb461a (Merge tag 'bootconfig-v7.0' of > git://git.kernel.or) > Kernel: 6.19.0-20260215-083120-09922-g770aaedb461a > Duration: 324 Sekunden > Result: bad > > With your patch, hibernation is fast again. It solves the problem I > reported. > > Thank you very much for taking care of my annoying problem. Thank you very much for the testing! I'll post the fix with your tested-by.