Re: Perfromance drop on SCSI hard disk

[Jens Axboe]

On 2011-05-19 10:26, Alex,Shi wrote:
> 
>> I will queue up the combined patch, it looks fine from here as well.
>>
> 
> When I have some time to study Jens and shaohua's patch today. I find a
> simpler way to resolved the re-enter issue on starved_list. Following
> Jens' idea, we can just put the starved_list device into kblockd if it
> come from __scsi_queue_insert(). 
> It can resolve the re-enter issue and recover performance totally, and
> need not a work_struct in every scsi_device. The logic/code also looks a
> bit simpler. 
> What's your opinion of this? 

Isn't this _identical_ to my original patch, with the added async run of
the queue passed in (which is important, an oversight)?

-- 
Jens Axboe

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/