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Received: from willy by casper.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1t4B2q-00000004nqv-0r6r; Fri, 25 Oct 2024 03:31:24 +0000 Date: Fri, 25 Oct 2024 04:31:23 +0100 From: Matthew Wilcox To: Baolin Wang Cc: akpm@linux-foundation.org, hughd@google.com, david@redhat.com, wangkefeng.wang@huawei.com, shy828301@gmail.com, dhowells@redhat.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: shmem: fallback to page size splice if large folio has poisoned subpages Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 99CAE80002 X-Stat-Signature: f3tjn1qche9ooun36chckd5t8i111idu X-Rspam-User: X-HE-Tag: 1729827056-382309 X-HE-Meta: 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 Mr4IdJZm MF1GuOVYddCYKzitPinIOQTPmQsJQ4NCWlfwp5rqMAGbfaxw4GSgdEdkPhpoNQGTOePwLdmQEyAB+BWt2x5IInmjiuVoDJ8GnikK5R5f1Biik7QwNUNa5hiwTSC80Lef42RRoFVHrU/oZNwbvS9YX796ynXqNYtWb3bcfta7u20VcpZPNiN+i9ShiMXBNfDGzC+4xqXcD754I7bMwPCV4mOFsyLUPqVBAONDg X-Bogosity: Ham, tests=bogofilter, spamicity=0.000021, 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 Fri, Oct 25, 2024 at 11:26:39AM +0800, Baolin Wang wrote: > The tmpfs has already supported the PMD-sized large folios, and splice() > can not read any subpages if the large folio has a poisoned subpage, > which is not good as we discussed in previous mail[1]. folios do not have subpages. folios have pages. do not use the term "subpage" anywhere. ever.