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Thu, 25 Jun 2026 02:03:07 -0700 (PDT) Received: from localhost ([212.73.77.104]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-49265975147sm55948915e9.5.2026.06.25.02.03.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 25 Jun 2026 02:03:06 -0700 (PDT) From: Askar Safin To: val@packett.cool Cc: akpm@linux-foundation.org, axboe@kernel.dk, brauner@kernel.org, david@kernel.org, dhowells@redhat.com, fuse-devel@lists.linux.dev, hch@infradead.org, jack@suse.cz, joannelkoong@gmail.com, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, miklos@szeredi.hu, netdev@vger.kernel.org, patches@lists.linux.dev, pfalcato@suse.de, rostedt@goodmis.org, safinaskar@gmail.com, torvalds@linux-foundation.org, viro@zeniv.linux.org.uk, willy@infradead.org Subject: Re: [PATCH 0/3] vmsplice: make vmsplice a trivial wrapper for preadv2/pwritev2 Date: Thu, 25 Jun 2026 12:03:01 +0300 Message-ID: <20260625090303.3796964-1-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <83f05c55-efba-4bf5-abfe-d2ab0819e904@packett.cool> References: <83f05c55-efba-4bf5-abfe-d2ab0819e904@packett.cool> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: 3e6k43776est38gndecgar97dxa6i61n X-Rspamd-Queue-Id: 4C5A5100002 X-Rspamd-Server: rspam06 X-HE-Tag: 1782378190-704432 X-HE-Meta: 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 Y0pJz5Hl 7s4lQvww1MkEjLiGWFwuA0Pf2d4XmHZtbaSQnG1mL927reVwKEjGD0P70HAClVoo45s/kRhCzDcoYyJme9Q3nnnC9nLzJENZUabJEaNVkMBj+x1lND5QfBdafG8f8uj7f9V3tKRwJ6ERO+0RxtYnJoDTV6dzan4oQDzIty9BubOPi/MxNs5MuLzxnoCJC5J3uKge9RIfGUVQmQprecjKxtb5PRnpDElzIXmhrL4o+M60Mh5OLhMy/rjCi43wfjqk7yvtYulUp0rVHuQI0qXmXxN8RvuvsK8LtG5f6WLHr9fHTWFwdSj0J23wdmhzgL4zm670g0NOMTYsMxXJWEJ+Z1DM35OkDN4rA1yQd1lycIPWKqUltGjSPeeEFRfVXmhGDnfcN0gmRNtXSrIu87Kxbgg3LUbD2Ptc5cbSl9v5qkChO+0hP8Y0kRbKVIiFHJKcUnDfWst6duRq8TGlzly6SYF8rcA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Val Packett : > speaking of fuse_dev_splice……_write actually, this series has broken > xdg-document-portal! > > https://github.com/flatpak/xdg-desktop-portal/issues/2026 > > Specifically what happens is that the EINVAL is returned due to oh.len > != nbytes: > > fuse_dev_do_write: oh.len 16400 != nbytes 15526 > > (where 16400 == 16384 (read len) + 16, 15526 == 15510 (file len) + 16) > > After reverting the series, there is no error because oh.len > becomes 15526 too. Please, test v2 version of my fixes: https://lore.kernel.org/lkml/20260625083409.3769242-1-safinaskar@gmail.com/ . This should fix this bug. -- Askar Safin