On 04/09, Chao Yu wrote: > On 2020/4/9 10:20, Jaegeuk Kim wrote: > > 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. :) > > I doubt it may has diff on non-ufs/emmc device? just guess.
I don't have any data on emmc, so maybe. Which case do we send REQ_PREFLUSH? > > Thanks, > > > > >> > >> Thanks, > >> > >>> > >>>> > >>>> Thanks, > >>> . > >>> > > . > > _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
