From owner-cvs-all Tue Oct 16 9:38:42 2001 Delivered-To: cvs-all@freebsd.org Received: from flood.ping.uio.no (flood.ping.uio.no [129.240.78.31]) by hub.freebsd.org (Postfix) with ESMTP id B67AF37B405; Tue, 16 Oct 2001 09:38:36 -0700 (PDT) Received: by flood.ping.uio.no (Postfix, from userid 2602) id BCCB714C2E; Tue, 16 Oct 2001 18:38:33 +0200 (CEST) X-URL: http://www.ofug.org/~des/ X-Disclaimer: The views expressed in this message do not necessarily coincide with those of any organisation or company with which I am or have been affiliated. To: Matthew Dillon Cc: Bruce Evans , , Subject: Re: cvs commit: src/sys/vm vnode_pager.c References: <200110161629.f9GGTju31481@apollo.backplane.com> From: Dag-Erling Smorgrav Date: 16 Oct 2001 18:38:33 +0200 In-Reply-To: <200110161629.f9GGTju31481@apollo.backplane.com> Message-ID: Lines: 14 User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matthew Dillon writes: > ffs_sync() in -current is doing a lot of mutex operations > in the loop. If you have various -current mutex debugging > options turned on, even the default ones I think, this could > be responsible for the latency you are experiencing. Each > scan loop is doing four mutex ops. So, what changed in the witness code to make it so slow (or in the FFS code to make it perform so many mutex operations) around late June / early July? DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message