linux-kernel - Re: AW: AW: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6

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Message-ID: <d12d516dea813f8c603b6fcd43afb3aeec1957f5.camel@unipv.it>
Date:   Thu, 28 Nov 2019 12:40:11 +0100
From:   Andrea Vai <andrea.vai@...pv.it>
To:     "Schmid, Carsten" <Carsten_Schmid@...tor.com>,
        Finn Thain <fthain@...egraphics.com.au>
Cc:     Ming Lei <ming.lei@...hat.com>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Alan Stern <stern@...land.harvard.edu>,
        Jens Axboe <axboe@...nel.dk>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        USB list <linux-usb@...r.kernel.org>,
        SCSI development list <linux-scsi@...r.kernel.org>,
        Himanshu Madhani <himanshu.madhani@...ium.com>,
        Hannes Reinecke <hare@...e.com>,
        Omar Sandoval <osandov@...com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Hans Holmberg <Hans.Holmberg@....com>,
        Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: AW: AW: Slow I/O on USB media after commit
 f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6

Il giorno gio, 28/11/2019 alle 08.12 +0000, Schmid, Carsten ha
scritto:
> 
> [...]
> 
> I assume the only thing that you change between the benchmarks
> is the kernel (and the modules, of course), right, Andrea?
> 

It's my production machine, so apart from the changes involved in a
"normal use of a PC" I can say that there are no changes I am aware of
(apart from the kernel, and other changes you told me to do, such as
changing the IO scheduler, etc)... but please remember I am not an
expert, so feel free to ask me what other kind of changes I can tell
you about.

Thanks,
Andrea