Re: [f2fs-dev] [PATCH] f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA

[Jaegeuk Kim]

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,