From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 217B7C432C0 for ; Mon, 25 Nov 2019 18:51:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF9D720748 for ; Mon, 25 Nov 2019 18:51:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=unipv-it.20150623.gappssmtp.com header.i=@unipv-it.20150623.gappssmtp.com header.b="0q6Imda0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727282AbfKYSvh (ORCPT ); Mon, 25 Nov 2019 13:51:37 -0500 Received: from mail-wr1-f43.google.com ([209.85.221.43]:34170 "EHLO mail-wr1-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725946AbfKYSvh (ORCPT ); Mon, 25 Nov 2019 13:51:37 -0500 Received: by mail-wr1-f43.google.com with SMTP id t2so19468175wrr.1 for ; Mon, 25 Nov 2019 10:51:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=unipv-it.20150623.gappssmtp.com; s=20150623; h=message-id:subject:from:to:cc:date:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=DXGmbfWdvrXuzWAE8BTOxQjhRPkzvMn2ZsCmjYzmHWg=; b=0q6Imda0TKBHEocYjyoSHIc0I6FRCKxOhTi8Zqg1IED3XejYap3FokRHDhuJkUBpnb atX5/nUhOZTRxVZIP1RBj3prnNo01hrBVS6/9h0boB3cdpGd00MMjbQCuLPjWH8ghS/2 +I7CIIR5VYVN05/X8cDCLajhxNC8mZOygCIivvDQACae+/BoQ05kpCrwiwRZmeC5COsV u3w3eepWApVFgdKhrR/eoGIvXNDkiie9xbIQ4X6qU9KSVkFQTwpT0TxkZpG/mWyAVeh0 G5GBxo08sw/78ZQXGSuYqCLvOF57i1C8rYVF88v7Ey+S8sdCcCta/JyT+Ls4CRFyzMfh uBjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=DXGmbfWdvrXuzWAE8BTOxQjhRPkzvMn2ZsCmjYzmHWg=; b=P/7mmQoZ1+DaSnvYbeb+yaBAfvabfZhw2I4TlZ4sh6vtQhLvo3EaLxpjQa43JQWuH2 8Jyj/AWdzDJ2EpD2cl0CAUFkJyNDntW3QQEncNSfM9Oo4lEw+rZIFSbwzKKpf3/DZbRJ jKQgM10RzEl5CuT1SvPtseCBIrdA3e98MwB0vU2x9PEaCPVjMgbxz5FpcD2TkqT6NxOe 9GHpBLRwxuIhJ7p2jJFu/nhcxOVgmbWwjy+5jD+Soq6/FM73dsxuTvsoKLxMAg9ifiEg kVDDl264ZxUG/9WVZwgqn0fHFMFE4o7tKc8z2WKKEdyWtl1hi9L9E9uJGVe5bKqH1bh+ pmgA== X-Gm-Message-State: APjAAAVM4n2+Gu2aSu2F/sNjZ8fXHc4hrroXx7cl2swLnHrfeQkJiL4i /X5DasQAOwLOGu/4AWJE22fXuQ== X-Google-Smtp-Source: APXvYqxhi6d9VcJssE3tE++11y8WGzYUwhsoFvGeh2gwaSz6FwkiZLQXnVXysYm4T3TJTd+4v1/gyQ== X-Received: by 2002:adf:e94e:: with SMTP id m14mr34093476wrn.233.1574707895385; Mon, 25 Nov 2019 10:51:35 -0800 (PST) Received: from angus.unipv.it (angus.unipv.it. [193.206.67.163]) by smtp.gmail.com with ESMTPSA id b186sm197328wmb.21.2019.11.25.10.51.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Nov 2019 10:51:34 -0800 (PST) Message-ID: <0876e232feace900735ac90d27136288b54dafe1.camel@unipv.it> Subject: Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 From: Andrea Vai To: Ming Lei Cc: Damien Le Moal , Alan Stern , Jens Axboe , Johannes Thumshirn , USB list , SCSI development list , Himanshu Madhani , Hannes Reinecke , Omar Sandoval , "Martin K. Petersen" , Greg KH , Hans Holmberg , Kernel development list Date: Mon, 25 Nov 2019 19:51:33 +0100 In-Reply-To: <20191125151535.GA8044@ming.t460p> References: <20191109222828.GA30568@ming.t460p> <20191123072726.GC25356@ming.t460p> <20191125035437.GA3806@ming.t460p> <20191125102928.GA20489@ming.t460p> <20191125151535.GA8044@ming.t460p> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.32.4 (3.32.4-1.fc30) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Il giorno lun, 25/11/2019 alle 23.15 +0800, Ming Lei ha scritto: > On Mon, Nov 25, 2019 at 03:58:34PM +0100, Andrea Vai wrote: > > [...] > > > What to try next? > > 1) cat /sys/kernel/debug/block/$DISK/hctx0/flags result: alloc_policy=FIFO SHOULD_MERGE|2 > > > 2) echo 128 > /sys/block/$DISK/queue/nr_requests and run your copy > 1GB > test again. done, and still fails. What to try next? Thanks, Andrea