Re: dd hangs when reading large partitions

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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.

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Full thread, for new recipients:
https://www.spinics.net/lists/linux-fsdevel/msg138601.html

Christoph, do you mean a3cd5ec55f6c7 ?

Regards.



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