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[193.206.67.163]) by smtp.gmail.com with ESMTPSA id h200sm1489232wme.11.2019.06.07.00.59.37 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 07 Jun 2019 00:59:37 -0700 (PDT) Message-ID: <4495ecd507b621746e3e661f52a900ffdcb9a469.camel@unipv.it> Subject: Re: Slow I/O on USB media From: Andrea Vai To: Greg KH Cc: linux-usb@vger.kernel.org, stern@rowland.harvard.edu Date: Fri, 07 Jun 2019 09:59:36 +0200 In-Reply-To: <20190606144757.GA12356@kroah.com> References: <2a9e1be71a2c6c940dac904752fdd34129745444.camel@unipv.it> <20190530132522.GA21005@kroah.com> <86676f40a8c1aa44bf5799eac6019183d6d33336.camel@unipv.it> <20190604054300.GE1588@kroah.com> <9b013238be4e3c63e33181a954d1ecc3287d22e4.camel@unipv.it> <20190605145525.GA28819@kroah.com> <0c2adde7154b0a6c8b2ad7fc5258916731b78775.camel@unipv.it> <463fb315f901783543c3bd5284523912c3c31080.camel@unipv.it> <20190605173902.GE27700@kroah.com> <20190606144757.GA12356@kroah.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.30.5 (3.30.5-1.fc29) 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 gio, 06/06/2019 alle 16.47 +0200, Greg KH ha scritto: > > > [...] > > As Alan said, 4.20 is older than 4.20.13. Thank you Greg, and thank you Alan for your explanations. > > But, is the kernel.org version of 4.20.13 really "good" here? > > I would start with Linus's tree and stay away from the stable trees > for now. ok, so hope I have understood correctly and started a new bisect from git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git , built it, tested it (5.2.0-rc3+) and marked as "bad", > As you end up with odd "leafs" that can confuse 'git bisect' > and everyone else. > > So start with 4.20.0. and I hope have understood correctly and did wget https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/snapshot/linux-4.20.tar.gz and built it and tested it, > Test that. If it is "good", then great! ...and ok is good :-), so issued git bisect good v4.20 ...and I am going on there. So far: $ git bisect log git bisect start # good: [8fe28cb58bcb235034b64cbbb7550a8a43fd88be] Linux 4.20 git bisect good 8fe28cb58bcb235034b64cbbb7550a8a43fd88be # bad: [01047631df813f6247185547c3778c80af088a20] Merge tag 'xfs-5.2-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux git bisect bad 01047631df813f6247185547c3778c80af088a20 # bad: [bcd49c3dd172c38e14faf151adca63c8db4c9557] Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad bcd49c3dd172c38e14faf151adca63c8db4c9557 # bad: [fcf010449ebe1db0cb68b2c6410972a782f2bd14] Merge tag 'kgdb-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux git bisect bad fcf010449ebe1db0cb68b2c6410972a782f2bd14 Please correct if I am missing something, or doing something different from what you meant. Thank you! Andrea