Re: dd hangs when reading large partitions

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On Sat, Jan 19, 2019 at 08:47:13PM +0100, Marc Gonzalez wrote:
> On 19/01/2019 10:56, Christoph Hellwig wrote:
> 
> > On Jan 18, 2019 at 10:48:15AM -0700, Jens Axboe wrote:
> >
> >> It's UFS that totally buggy, if you look at its queuecommand, it does:
> >>
> >>         if (!down_read_trylock(&hba->clk_scaling_lock))                         
> >>                 return SCSI_MLQUEUE_HOST_BUSY;
> >>
> >> UFS either needs to get fixed up, or we'll want a way to do something like
> >> the below.
> > 
> > I think the right answer is to just revert the offending patch instead
> > of papering over it in the SCSI code.
> 
> [ Adjusting recipients list ]
> 
> Full thread, for new recipients:
> https://www.spinics.net/lists/linux-fsdevel/msg138601.html
> 
> Christoph, do you mean a3cd5ec55f6c7 ?

Yes.



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