lkml.org 
[lkml]   [2018]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: 答复: Re: [PATCH v2] scsi: Introduce sd ev printk ratelimited to throttlefrequent printk
From
Date


On 2018/4/2 13:29, Sergey Senozhatsky wrote:
> On (04/02/18 13:14), wen.yang99@zte.com.cn wrote:
>>
>> > It's true that this print for the same device is useless. But it's
>> > useful for different devices. Is it possible to limit the print only
>> > for the same device?
>>
>> In our scene, it's just for the same device (q->queuedata), Thanks.
>
> Yes, what Jason meant was that rate limit struct is shared by different call
> sites - including scsi_request_fn() from different devices.
>
> If device1->scsi_request_fn()->sdev_printk_ratelimited() causes printk rate
> limit, then messages from device2->scsi_request_fn()->sdev_printk_ratelimited()
> may be lost entirely, unless you have enough of them.
>
> -ss
>

Yes, that's exactly what I mean.

Thanks,

Jason

> .
>

\
 
 \ /
  Last update: 2018-04-02 08:08    [W:0.615 / U:0.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site