linux-kernel - Re: reeze while write on external usb 3.0 hard disk [Bug 204095]

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Message-ID: <20190826173833.GA4166@lazy.lzy>
Date:   Mon, 26 Aug 2019 19:38:33 +0200
From:   Piergiorgio Sartor <piergiorgio.sartor@...go.de>
To:     Piergiorgio Sartor <piergiorgio.sartor@...go.de>
Cc:     Christoph Hellwig <hch@....de>,
        Alan Stern <stern@...land.harvard.edu>,
        Jens Axboe <axboe@...nel.dk>,
        USB list <linux-usb@...r.kernel.org>,
        linux-block@...r.kernel.org,
        Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: reeze while write on external usb 3.0 hard disk [Bug 204095]

On Tue, Aug 20, 2019 at 06:37:22PM +0200, Piergiorgio Sartor wrote:
> On Tue, Aug 20, 2019 at 09:23:26AM +0200, Christoph Hellwig wrote:
> > On Mon, Aug 19, 2019 at 10:14:25AM -0400, Alan Stern wrote:
> > > Let's bring this to the attention of some more people.
> > > 
> > > It looks like the bug that was supposed to be fixed by commit
> > > d74ffae8b8dd ("usb-storage: Add a limitation for
> > > blk_queue_max_hw_sectors()"), which is part of 5.2.5, but apparently
> > > the bug still occurs.
> > 
> > Piergiorgio,
> > 
> > can you dump the content of max_hw_sectors_kb file for your USB storage
> > device and send that to this thread?
> 
> Hi all,
> 
> for both kernels, 5.1.20 (working) and 5.2.8 (not working),
> the content of /sys/dev/x:y/queue/max_hw_sectors_kb is 512
> for USB storage devices (2.0 and 3.0).
> 
> This is for the PC showing the issue.
> 
> In an other PC, which does not show the issus at the moment,
> the values are 120, for USB2.0, and 256, for USB3.0.

Hi again,

any news on this?

Is there anything I can do to help?

Should I report this somewhere else too?

Currently this is quite a huge problem for me,
since the only working external storage is an
old 1394 HDD...

Thanks,

bye,

-- 

piergiorgio