From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <53B71D24.606@kernel.dk> Date: Fri, 04 Jul 2014 15:31:16 -0600 From: Jens Axboe MIME-Version: 1.0 Subject: Re: lots of closes causing lots of invalidates while running References: <94D0CD8314A33A4D9D801C0FE68B402958B83482@G9W0745.americas.hpqcorp.net> <53B71A50.603@kernel.dk> <94D0CD8314A33A4D9D801C0FE68B402958B86823@G9W0745.americas.hpqcorp.net> In-Reply-To: <94D0CD8314A33A4D9D801C0FE68B402958B86823@G9W0745.americas.hpqcorp.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: "Elliott, Robert (Server Storage)" , "fio@vger.kernel.org" Cc: "dgilbert@interlog.com" List-ID: On 2014-07-04 15:26, Elliott, Robert (Server Storage) wrote: > > >> -----Original Message----- >> From: Jens Axboe [mailto:axboe@kernel.dk] >> Sent: Friday, 04 July, 2014 4:19 PM >> To: Elliott, Robert (Server Storage); fio@vger.kernel.org >> Cc: dgilbert@interlog.com >> Subject: Re: lots of closes causing lots of invalidates while running >> >> How big are the devices? Should only open/close once per reading it, but >> if it's scsi_debug and they are small, then that might explain it. If >> that's not the case, it's definitely a but and we'll need to look into it. >> > > My original test was with 128 MiB. > Same result with 1 GiB. > Goes away with 2 GiB and 4 GiB. The behavior should be the same, just a change in frequency. -- Jens Axboe