From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phillip Susi Subject: Re: Tracking actual disk write sources instead of flush thread Date: Wed, 16 Apr 2014 15:27:52 -0400 Message-ID: <534ED9B8.9090605@ubuntu.com> References: <534DE477.5080904@ubuntu.com> <20140416140147.GA15429@linux.intel.com> <534E9E9D.5030600@ubuntu.com> <4C30833E5CDF444D84D942543DF65BDA625F51A9@G4W3303.americas.hpqcorp.net> <534EC964.6080702@ubuntu.com> <4C30833E5CDF444D84D942543DF65BDA625F5246@G4W3303.americas.hpqcorp.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "linux-fsdevel@vger.kernel.org" To: "Zuckerman, Boris" , Matthew Wilcox Return-path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120]:46505 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932070AbaDPT1y (ORCPT ); Wed, 16 Apr 2014 15:27:54 -0400 In-Reply-To: <4C30833E5CDF444D84D942543DF65BDA625F5246@G4W3303.americas.hpqcorp.net> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 4/16/2014 2:28 PM, Zuckerman, Boris wrote: > [bz:] In such case I'd rather have lighter implementation of > caching layer, than ability to track disk IOs per process. IOs per > process can be tracked by other tools... What other tools? I can envision blktrace being extended to hook into the mm layer to track the real source of writes, but without any overhead when the trace is not running. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTTtm3AAoJEI5FoCIzSKrwPPkIAJKnDv4uJfBAufqRlQbRPmcM T3F6Dapzs2XSiMaBCaMeZQx4Zp7wxn79IM76GQeNUekHrV74kFqwLF7ezLpAviEm IBdnhWv3uJXS6uX40os0DOqlRj5H49EhPzbLN6f5z4ARds06Zc+Z9flauCadZyce j/1tinzm0cNYUxAIL9L+m1x7kj8Qzpq5LYyOEw7M8AL93xMGPJLgt4xWUP0JwP3l cgiZKGD6H/ySDAFhckynCjmLdaDDNMOg8uWhyDNk8VQQnWuAzEwK3QgpfnLNSfkJ vo1lvqMp86doRHc7pBoqY6cCU/iIrmXiMGMjVCXExkVFK4GrBHYlqlsBHnY5qys= =mtN2 -----END PGP SIGNATURE-----