From owner-freebsd-hackers@freebsd.org Thu Apr 7 17:45:47 2016 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2E50AB06009 for ; Thu, 7 Apr 2016 17:45:47 +0000 (UTC) (envelope-from vrwmiller@gmail.com) Received: from mail-oi0-x22b.google.com (mail-oi0-x22b.google.com [IPv6:2607:f8b0:4003:c06::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EB63F1AEA for ; Thu, 7 Apr 2016 17:45:46 +0000 (UTC) (envelope-from vrwmiller@gmail.com) Received: by mail-oi0-x22b.google.com with SMTP id s79so108202985oie.1 for ; Thu, 07 Apr 2016 10:45:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:date:message-id:subject:from:to; bh=KYGKPGqruvmbZzObj3od5iMtLTWifEd/MJPUAx/zNVU=; b=SYvXTtOxGpaOMFKlkmANpPUBqoZ+FRr/F1rVK0y6D/1UO6IHOnEZ/psZdcJalSB1l3 7TNDb2ePdb3tYtsYt69YPOoco/I6lJ9mErwvhK/+ynCEWtzp2nxCKuf8r/sRdgMVbaVf nH71ZfDZnufUdQGBmuvPmLF1DVIB22ARM+c7uDrZDZGSjUbNV4mSzJJFhRSXwOS29EZm 08nmQUG0dbaAKL+B6MNXiq2sGKbH5tZrN443LIE2SbiaTkeMyxzJTSydLce7eKQgTXIM kTFYpjJPcQOTMX9gIX53fq0hMZPg+Gr9YPhEb6Rbw1R07Yl30piuhWfNXl/Xg08JcE8d mcXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:date:message-id:subject:from :to; bh=KYGKPGqruvmbZzObj3od5iMtLTWifEd/MJPUAx/zNVU=; b=O7GczQ0BlOKyqlh0FMn8aG6NWYyNALl6avO06DWYmY0DjwX6sYEfFRekGZk1CVC4iy yP1VHxahqwr1CkdyoOnENztjYm6aOfZe1Hht82vwxpwZ6kKtwkjS1did9BEhLdtpveGI 9juClkl4ArIRydAHGnQayEnNaWxa2kNbZnTjtao3CuYI7K7nzgv7Rr5EBPEkJXBxFLhX vR++IFjevAcP3IzUuCSZkItIG1x7VVXB9FzlK2pLKmrJpQe0WN5qf3ssEaBZvIPMhHJx RSxQ3g3/m8PI+TAtjpos0T32IBV7G1jeZv2g/MX1II+dAOu+/2hKL1JzgjbMSzpxUe7K Ratw== X-Gm-Message-State: AD7BkJLc+1s1RvWd2iKECwZMicK0svWoVX3+F5+L5JO7mrAfWviUzX+QVmPGir2CbjxRMAJEnq8Dy00vLIEy5A== MIME-Version: 1.0 X-Received: by 10.157.39.193 with SMTP id c59mr2367919otb.111.1460051146313; Thu, 07 Apr 2016 10:45:46 -0700 (PDT) Sender: vrwmiller@gmail.com Received: by 10.202.198.18 with HTTP; Thu, 7 Apr 2016 10:45:46 -0700 (PDT) Date: Thu, 7 Apr 2016 13:45:46 -0400 X-Google-Sender-Auth: 2O1ZsU8Eo7gKSaHhc44UEK1DFIY Message-ID: Subject: AIO in 10.0-RELEASE From: Rick Miller To: freebsd-hackers@freebsd.org X-Mailman-Approved-At: Thu, 07 Apr 2016 18:00:46 +0000 Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.21 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Apr 2016 17:45:47 -0000 Please reply directly as I am not currently subscribed to this particular mailing list... A user has been implementing AIO features in an application on FreeBSD 10.0-RELEASE. They assert that, despite aio(4) stating that it is enabled either statically (with VFS_AIO in the kernel config) or dynamically (kldload), in their development environment there was no requirement for either of these methods of enabling AIO. My google-foo is failing me when it comes to FreeBSD's AIO. This question defies logic, but is it possible that AIO works by default in earlier versions of 10.0 and not in more recent version of 10.0 without any local system changes? It is understood that AIO has recently been enabled by default in FreeBSD 10.3 and -CURRENT. This particular scenario is applicable to 10.0. -- Take care Rick Miller