From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: To: Paolo Valente , References: From: Bart Van Assche Message-ID: <8adc094c-bf02-ecc3-67ac-7ffac3ef2491@sandisk.com> Date: Wed, 21 Sep 2016 07:30:10 -0700 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Cc: b.zolnierkie@samsung.com, Jens Axboe , hare@suse.de, Tejun Heo , osandov@osandov.com, hch@lst.de Subject: Re: [Ksummit-discuss] [TECH TOPIC] Addressing long-standing high-latency problems related to I/O List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 09/16/16 00:55, Paolo Valente wrote: > Linux systems suffers from long-standing high-latency problems, at > system and application level, related to I/O. Hello Paolo, Are you aware of Jens' throttled background buffered writeback work? If not, can you repeat your measurements against a kernel on which these patches have been applied? See also http://www.spinics.net/lists/linux-fsdevel/msg101391.html. Thanks, Bart.