lkml.org 
[lkml]   [2020]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [f2fs-dev] [PATCH] f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA
On 04/07, Chao Yu wrote:
> 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?

I don't see any diff on performance, so not interesting. :)

>
> Thanks,
>
> >
> >>
> >> Thanks,
> > .
> >

\
 
 \ /
  Last update: 2020-04-09 04:20    [W:0.026 / U:1.540 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site