Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6

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On 02/07/19 20:01:13, Ming Lei wrote:
> On Tue, Jul 02, 2019 at 12:46:45PM +0200, Andrea Vai wrote:
> > Hi,
> >   I have a problem writing data to a USB pendrive, and it seems
> > kernel-related. With the help of Greg an Alan (thanks) and some
> > bisect, I found out the offending commit being
> > 
> > commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6
> > 
> >  [...]    
> >     
> 
> One possible reason may be related with too small 'nr_requests', could
> you apply the following command and see if any difference can be made?
> 
> echo 32 > /sys/block/sdN/queue/nr_requests

I applied it (echo 32 > /sys/block/sdf/queue/nr_requests), ran the test again, and still failed. I assumed I didn't have to build the kernel again, did I? (sorry but I am not skilled)

Many thanks,
Andrea




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