From nobody Wed Sep 20 21:16:30 2023 X-Original-To: doc@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4RrWYV231Cz4vBC8 for ; Wed, 20 Sep 2023 21:16:30 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4RrWYV0gHWz4Q98 for ; Wed, 20 Sep 2023 21:16:30 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1695244590; a=rsa-sha256; cv=none; b=meCU+a5yp1zR22V51KcitGWgwv7Pnww+cPaN2T1dK8BZtQs9k5oXS/2dYhM2tjiqY/kP1d RobyX4bd8B/7gkXl/tR/7RvW5ALeuDtXTOQwLErTfmlPiIWt3sMd+8Ck0tTDBCK86ptVqs iSG2ooNOYwi+XduURWiM/FtEZmzMBKgo1CI+uOhUPFXFlWd5bY8lIWsBWTny/uHQnF5vX/ T/BxSuHZPcXyxHbI8tRaBTghczTgNbWSJ05kaQvKM8g/SYPh3j10SgKcQtFAG1NBtK3+7z inTa9okF2SLARmCAUI8FSqWw/XMr+yMcvWc3xMqluPDBdDH0y+9U32NGh5WaEw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1695244590; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0EbgWhpFi5XD6vDGWPzErOAjz0G6eKUZDN91mHI42pI=; b=WUPCA5ZGalim/hoRv05xQePk0pC3npxAnV5xW0T0X/70dfzrLVBezFwpv43WM8XrFXrTbn 5gxOQdZPH3pQ5p14Nh+eeFqbqyHDkdQ8h+lV8EAjtc4hgbURlDSVaaNEgNqxCdUzcxFdYI 1A1brcAEwbfWDEGkfwQJ9xItx44N5LnCSMBAHGJGIzEszvprTgbhfOumEDwHPqU3k9KHnN fSRmgvHaR58BmmQnMUDjEFZZaXiZyPI2G4gIPx3632CKw8KG5OHMshB5E3LSIA/HtJEayG GIaTlfUCLnGvuKk4PdbHsy8XeltVucSGH9kCOBXIEzLeCLlla4zNbNFkUtjhkQ== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4RrWYT6tQBz1B6j for ; Wed, 20 Sep 2023 21:16:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 38KLGTPs018834 for ; Wed, 20 Sep 2023 21:16:29 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 38KLGTQL018833 for doc@FreeBSD.org; Wed, 20 Sep 2023 21:16:29 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: doc@FreeBSD.org Subject: [Bug 273962] copy_file_range does not work on shared memory objects Date: Wed, 20 Sep 2023 21:16:30 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Documentation X-Bugzilla-Component: Manual Pages X-Bugzilla-Version: Latest X-Bugzilla-Keywords: needs-patch X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: rmacklem@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Documentation project List-Archive: https://lists.freebsd.org/archives/freebsd-doc List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-doc@freebsd.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273962 --- Comment #5 from Rick Macklem --- I looked and doing the fallback will require some messing about. shm_read() and shm_write() do range locking however copy_file_ramge() needs to do range locking on both fds before copying. I think variants of shm_read() and shm_write() would need to be created without the range locking so that kern_copy_file_range() can call those. kern_copy_file_range() will also need to use rangelock_rlock(), rangelock_tryrlock() and rangelock_wlock() etc for this case. --=20 You are receiving this mail because: You are on the CC list for the bug.=