lkml.org 
[lkml]   [2020]   [Apr]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [f2fs-dev] [PATCH] f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA
From
Date
On 2020/4/7 10:59, Jaegeuk Kim wrote:
> On 04/07, Chao Yu wrote:
>> On 2020/4/4 0:12, Jaegeuk Kim wrote:
>>> This patch introduces a way to attach REQ_META/FUA explicitly
>>> to all the data writes given temperature.
>>>
>>> -> attach REQ_FUA to Hot Data writes
>>>
>>> -> attach REQ_FUA to Hot|Warm Data writes
>>>
>>> -> attach REQ_FUA to Hot|Warm|Cold Data writes
>>>
>>> -> attach REQ_FUA to Hot|Warm|Cold Data writes as well as
>>> REQ_META to Hot Data writes
>>
>> Out of curiosity, what scenario it is used for?
>
> It's testing purpose to compare the bandwidths per different IO flags.

Thanks for the hint. :)

As nobarrier was set in Android, so REQ_PREFLUSH will not be considered in
this sysfs interface?

Thanks,

>
>>
>> Thanks,
> .
>

\
 
 \ /
  Last update: 2020-04-07 05:41    [W:0.059 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site