From owner-freebsd-fs@freebsd.org Wed Nov 15 08:30:18 2017 Return-Path: Delivered-To: freebsd-fs@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 518B2DD51F1 for ; Wed, 15 Nov 2017 08:30:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3FB4B2D1F for ; Wed, 15 Nov 2017 08:30:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id vAF8UIUf032851 for ; Wed, 15 Nov 2017 08:30:18 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-fs@FreeBSD.org Subject: [Bug 222929] ZFS ARC stats have wrong count Date: Wed, 15 Nov 2017 08:30:18 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: naito.yuichiro@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-fs@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 MIME-Version: 1.0 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Nov 2017 08:30:18 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222929 --- Comment #8 from naito.yuichiro@gmail.com --- (In reply to Allan Jude from comment #7) Thank you very much to your investigation. My ruby script doesn't read disks actually. I thought this means all metadata is cached. I saw no problem with performance. > Anyway, I am investigating a quick fixes to account for the cache hit=20 > correctly, instead of as a cache miss. I hope your fix. > I am also looking to see if it would be relatively simple to optimize the= case > and return the data more directly in arc_read() instead of creating a zio= and > going the currently more complicated path. This path mostly exists becaus= e it makes > it possible for other functions to not need to know about the embedded bl= ock=20 > pointer feature. I don't know about zfs source codes. But if you need to test your patch in my environment, please ask me. I will test in new boot environment on my PC. I learned the feature in your session in BSDtw! --=20 You are receiving this mail because: You are the assignee for the bug.=