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Message-ID: <320b315b9c87543d4fb919ecbdf841596c8fbcea.camel@unipv.it>
Date: Fri, 29 Nov 2019 15:41:01 +0100
From: Andrea Vai <andrea.vai@...pv.it>
To: Ming Lei <ming.lei@...hat.com>
Cc: "Schmid, Carsten" <Carsten_Schmid@...tor.com>,
Finn Thain <fthain@...egraphics.com.au>,
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: Slow I/O on USB media after commit
f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6
Il giorno ven, 29/11/2019 alle 10.35 +0800, Ming Lei ha scritto:
> On Fri, Nov 29, 2019 at 08:57:34AM +0800, Ming Lei wrote:
>
> > [...]
>
> > Andrea, can you collect the following log when running the test
> > on current new(bad) kernel?
> >
> > /usr/share/bcc/tools/stackcount -K blk_mq_make_request
>
> Instead, please run the following trace, given insert may be
> called from other paths, such as flush plug:
>
> /usr/share/bcc/tools/stackcount -K t:block:block_rq_insert
Attached, for new (patched) bad kernel.
Produced by: start the trace script (with the pendrive already
plugged), wait some seconds, run the test (1 trial, 1 GB), wait for
the test to finish, stop the trace.
The copy took ~1700 seconds.
Thanks,
Andrea
Download attachment "log_ming_20191129_150609.zip" of type "application/zip" (2996 bytes)
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